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	<title>背景アニメーション &#8211; ケケンタの独学ITブログ</title>
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	<description>プログラミングやWeb制作の情報を発信</description>
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	<title>背景アニメーション &#8211; ケケンタの独学ITブログ</title>
	<link>https://kekenta-it-blog.com</link>
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		<title>【コピペOK】背景アニメーション｜5種類【Web制作】</title>
		<link>https://kekenta-it-blog.com/background-animation-guide-particle-effects/</link>
					<comments>https://kekenta-it-blog.com/background-animation-guide-particle-effects/#respond</comments>
		
		<dc:creator><![CDATA[ケケンタ]]></dc:creator>
		<pubDate>Sun, 13 Jul 2025 10:42:43 +0000</pubDate>
				<category><![CDATA[アニメーション]]></category>
		<category><![CDATA[CSS]]></category>
		<category><![CDATA[HTML]]></category>
		<category><![CDATA[Javascript]]></category>
		<category><![CDATA[Web制作]]></category>
		<category><![CDATA[パーティクル]]></category>
		<category><![CDATA[背景アニメーション]]></category>
		<guid isPermaLink="false">https://kekenta-it-blog.com/?p=15296</guid>

					<description><![CDATA[<p><img src="https://kekenta-it-blog.com/wp-content/uploads/2025/07/eye-catch__background-animation-guide-particle-effects__15296-1024x576.jpg" class="webfeedsFeaturedVisual" /></p>今回はこのようなお悩みをお持ちの方へ向けて Web制作において人気の高いアニメーション効果パーティクル効果 をご紹介します。 5種類のパーティクル効果を完全網羅した実装なので、いままさに「背景アニメーションを実装しないと [&#8230;]]]></description>
										<content:encoded><![CDATA[<p><img src="https://kekenta-it-blog.com/wp-content/uploads/2025/07/eye-catch__background-animation-guide-particle-effects__15296-1024x576.jpg" class="webfeedsFeaturedVisual" /></p><div class="swell-block-balloon"><div class="c-balloon -bln-left" data-col="gray"><div class="c-balloon__icon -circle"><img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="https://kekenta-it-blog.com/wp-content/uploads/2023/07/困った顔-150x150.jpg" alt="" class="lazyload c-balloon__iconImg" width="80px" height="80px"><noscript><img decoding="async" src="https://kekenta-it-blog.com/wp-content/uploads/2023/07/困った顔-150x150.jpg" alt="" class="c-balloon__iconImg" width="80px" height="80px"></noscript><span class="c-balloon__iconName">ケケンタ</span></div><div class="c-balloon__body -speaking -border-on"><div class="c-balloon__text">
<p>背景に美しい粒子アニメーションを実装したい……</p>
<span class="c-balloon__shapes"><span class="c-balloon__before"></span><span class="c-balloon__after"></span></span></div></div></div></div>

<div class="swell-block-balloon"><div class="c-balloon -bln-left" data-col="gray"><div class="c-balloon__icon -circle"><img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="https://kekenta-it-blog.com/wp-content/uploads/2023/07/困った顔-150x150.jpg" alt="" class="lazyload c-balloon__iconImg" width="80px" height="80px"><noscript><img decoding="async" src="https://kekenta-it-blog.com/wp-content/uploads/2023/07/困った顔-150x150.jpg" alt="" class="c-balloon__iconImg" width="80px" height="80px"></noscript><span class="c-balloon__iconName">ケケンタ</span></div><div class="c-balloon__body -speaking -border-on"><div class="c-balloon__text">
<p>ランディングページをより魅力的にしたい……</p>
<span class="c-balloon__shapes"><span class="c-balloon__before"></span><span class="c-balloon__after"></span></span></div></div></div></div>


<p class="wp-block-paragraph">今回はこのようなお悩みをお持ちの方へ向けて</p>



<p class="has-text-align-center is-style-big_kakko_box wp-block-paragraph">Web制作において人気の高いアニメーション効果<br><strong><span class="swl-marker mark_yellow">パーティクル効果</span></strong></p>



<p class="wp-block-paragraph">をご紹介します。</p>



<p class="wp-block-paragraph"><strong>5種類のパーティクル効果</strong>を完全網羅した実装なので、いままさに「背景アニメーションを実装しないといけない！」という方は丸っとコピペしてどうぞご活用ください！</p>



<div class="swell-block-capbox cap_box"><div class="cap_box_ttl"><span><span style="--the-icon-svg: url(data:image/svg+xml;base64,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)" data-icon="LsLightbulb" data-id="0" aria-hidden="true" class="swl-inline-icon"> </span> <strong>この記事で紹介するパーティクル効果</strong></span></div><div class="cap_box_content">
<ul class="wp-block-list is-style-num_circle -list-under-dashed">
<li>基本的なパーティクル（シンプルで高パフォーマンス）</li>



<li>マウス追従パーティクル（インタラクティブな体験）</li>



<li>星空パーティクル（ロマンチックな雰囲気）</li>



<li>爆発パーティクル（インパクト大の演出）</li>



<li>浮遊パーティクル（自然な動き）</li>
</ul>
</div></div>


<div class="swell-block-balloon"><div class="c-balloon -bln-left" data-col="gray"><div class="c-balloon__icon -circle"><img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="https://kekenta-it-blog.com/wp-content/uploads/2023/07/キリッ-150x150.jpg" alt="" class="lazyload c-balloon__iconImg" width="80px" height="80px"><noscript><img decoding="async" src="https://kekenta-it-blog.com/wp-content/uploads/2023/07/キリッ-150x150.jpg" alt="" class="c-balloon__iconImg" width="80px" height="80px"></noscript><span class="c-balloon__iconName">ケケンタ</span></div><div class="c-balloon__body -speaking -border-on"><div class="c-balloon__text">
<p>特に<strong>ランディングページの背景</strong>や<strong>ポートフォリオサイトの装飾</strong>には、パーティクル効果が非常に効果的です。この記事のコードをご活用いただきWeb制作の効率化に繋がれば何よりです。</p>
<span class="c-balloon__shapes"><span class="c-balloon__before"></span><span class="c-balloon__after"></span></span></div></div></div></div>


<p class="wp-block-paragraph">なお、今回ご紹介するアニメーションは<strong>Canvas API</strong>を使用した実装なので、高性能で美しいアニメーションが実現できます。</p>



<p class="is-style-balloon_box wp-block-paragraph"><span data-icon="LsBookmark" data-id="0" style="--the-icon-svg: url(data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjFlbSIgd2lkdGg9IjFlbSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiBhcmlhLWhpZGRlbj0idHJ1ZSIgdmlld0JveD0iMCAwIDQ4IDQ4Ij48cGF0aCBkPSJNMTAgM2gyOGMxLjEgMCAyIC45IDIgMnYzOS42YzAgLjktMS4xIDEuMy0xLjcuN0wyNCAzMSA5LjcgNDUuM2MtLjYuNi0xLjcuMi0xLjctLjdWNWMwLTEuMS45LTIgMi0yeiI+PC9wYXRoPjwvc3ZnPg==)" aria-hidden="true" class="swl-inline-icon"> </span> <strong>あわせて読みたい</strong></p>


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				<span class="c-blogLink__text">【コピペOK】フェードイン系アニメーション｜6種類【Web制作】</span>
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<hr class="wp-block-separator has-alpha-channel-opacity"/>



<h2 class="wp-block-heading">パーティクル効果とは</h2>



<p class="wp-block-paragraph">パーティクル効果は、<strong>小さな粒子が画面上で動くアニメーション効果</strong>です。背景装飾やインタラクティブな演出として使用され、ページの視覚的な魅力を大幅に向上させます。</p>



<h3 class="wp-block-heading">効果的な使用場面</h3>



<p class="is-style-balloon_box u-mb-ctrl u-mb-10 wp-block-paragraph"><span data-icon="LsCircle" data-id="0" style="--the-icon-svg: url(data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjFlbSIgd2lkdGg9IjFlbSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiBhcmlhLWhpZGRlbj0idHJ1ZSIgdmlld0JveD0iMCAwIDQ4IDQ4Ij48cGF0aCBkPSJNMjQgNDYuNUMxMS42IDQ2LjUgMS41IDM2LjQgMS41IDI0UzExLjYgMS41IDI0IDEuNSA0Ni41IDExLjYgNDYuNSAyNCAzNi40IDQ2LjUgMjQgNDYuNXptMC00MEMxNC40IDYuNSA2LjUgMTQuNCA2LjUgMjRTMTQuNCA0MS41IDI0IDQxLjUgNDEuNSAzMy42IDQxLjUgMjQgMzMuNiA2LjUgMjQgNi41eiI+PC9wYXRoPjwvc3ZnPg==)" aria-hidden="true" class="swl-inline-icon"> </span><strong>適している場面</strong></p>



<div class="wp-block-group has-border -border01"><div class="wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained">
<ul class="wp-block-list is-style-good_list">
<li>ランディングページの背景</li>



<li>ポートフォリオサイトの装飾</li>



<li>ゲームの演出効果</li>



<li>イベントページの演出</li>



<li>プレゼンテーションの背景</li>
</ul>
</div></div>



<p class="is-style-balloon_box u-mb-ctrl u-mb-10 wp-block-paragraph"><span data-icon="LsX" data-id="0" style="--the-icon-svg: url(data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjFlbSIgd2lkdGg9IjFlbSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiBhcmlhLWhpZGRlbj0idHJ1ZSIgdmlld0JveD0iMCAwIDQ4IDQ4Ij48cGF0aCBkPSJNMjcuNSAyNCA0My40IDguMWMuNC0uNC40LTEgMC0xLjRsLTIuMS0yLjFjLS40LS40LTEtLjQtMS40IDBMMjQgMjAuNSA4LjEgNC42Yy0uNC0uNC0xLS40LTEuNCAwTDQuNiA2LjdjLS40LjQtLjQgMSAwIDEuNEwyMC41IDI0IDQuNiAzOS45Yy0uNC40LS40IDEgMCAxLjRsMi4xIDIuMWMuNC40IDEgLjQgMS40IDBMMjQgMjcuNWwxNS45IDE1LjljLjQuNCAxIC40IDEuNCAwbDIuMS0yLjFjLjQtLjQuNC0xIDAtMS40TDI3LjUgMjR6Ij48L3BhdGg+PC9zdmc+)" aria-hidden="true" class="swl-inline-icon"> </span> <strong>避けるべき場面</strong></p>



<div class="wp-block-group has-border -border01"><div class="wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained">
<ul class="wp-block-list is-style-bad_list">
<li>テキストが読みにくくなる場面</li>



<li>重要な情報の表示部分</li>



<li>モバイルデバイスでの重い処理</li>



<li>アクセシビリティを重視する場面</li>
</ul>
</div></div>



<hr class="wp-block-separator has-alpha-channel-opacity"/>



<h2 class="wp-block-heading">実装方法の比較</h2>



<figure class="wp-block-table is-thead-centered is-all-centered--va"><table class="has-fixed-layout"><thead><tr><th>パーティクル効果</th><th>難易度</th><th>視覚的インパクト</th><th>パフォーマンス</th><th>ブラウザ対応</th></tr></thead><tbody><tr><th>基本的な<br>パーティクル</th><td>⭐⭐</td><td>⭐⭐⭐</td><td>⭐⭐⭐⭐⭐</td><td>⭐⭐⭐⭐⭐</td></tr><tr><th>マウス追従<br>パーティクル</th><td>⭐⭐⭐</td><td>⭐⭐⭐⭐</td><td>⭐⭐⭐⭐</td><td>⭐⭐⭐⭐⭐</td></tr><tr><th>星空パーティクル</th><td>⭐⭐⭐</td><td>⭐⭐⭐⭐⭐</td><td>⭐⭐⭐</td><td>⭐⭐⭐⭐</td></tr><tr><th>爆発パーティクル</th><td>⭐⭐⭐⭐</td><td>⭐⭐⭐⭐⭐</td><td>⭐⭐</td><td>⭐⭐⭐⭐</td></tr><tr><th>浮遊パーティクル</th><td>⭐⭐⭐</td><td>⭐⭐⭐⭐</td><td>⭐⭐⭐</td><td>⭐⭐⭐⭐</td></tr></tbody></table></figure>


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<h2 class="wp-block-heading">基本的なパーティクル</h2>



<h3 class="wp-block-heading">① デモ</h3>



<p class="codepen" data-height="391" data-default-tab="html,result" data-slug-hash="GgpgdyK" data-pen-title="基本的なパーティクル" data-user="lgshifbg-the-looper" style="height: 391px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;">
  <span>See the Pen <a href="https://codepen.io/lgshifbg-the-looper/pen/GgpgdyK">
  基本的なパーティクル</a> by ケケンタ (<a href="https://codepen.io/lgshifbg-the-looper">@lgshifbg-the-looper</a>)
  on <a href="https://codepen.io">CodePen</a>.</span>
</p>
<script async src="https://public.codepenassets.com/embed/index.js"></script>



<div class="swell-block-capbox cap_box"><div class="cap_box_ttl"><span><span style="--the-icon-svg: url(data:image/svg+xml;base64,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)" data-icon="LsLightbulb" data-id="0" aria-hidden="true" class="swl-inline-icon"> </span> <strong>このパーティクルの特徴</strong></span></div><div class="cap_box_content">
<ul class="wp-block-list is-style-check_list -list-under-dashed">
<li>シンプルで分かりやすい実装</li>



<li>高いパフォーマンス</li>



<li>すべてのブラウザで対応</li>
</ul>
</div></div>



<h3 class="wp-block-heading">② HTML</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-html" data-lang="HTML"><code>&lt;canvas id=&quot;particleCanvas&quot;&gt;&lt;/canvas&gt;
&lt;div class=&quot;content&quot;&gt;
    &lt;h1&gt;パーティクル効果&lt;/h1&gt;
    &lt;p&gt;美しい粒子アニメーション&lt;/p&gt;
&lt;/div&gt;</code></pre></div>



<p class="is-style-big_icon_point wp-block-paragraph">Canvas要素を背景に配置し、その上にコンテンツを重ねる構造です。</p>



<h3 class="wp-block-heading">③ CSS</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-css" data-lang="CSS"><code>body {
    margin: 0;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

canvas {
    display: block;
}

.content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 10;
}</code></pre></div>



<h3 class="wp-block-heading">④ JavaScript</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-js" data-lang="JavaScript"><code>class Particle {
    constructor(canvas, options = {}) {
        this.canvas = canvas;
        this.ctx = canvas.getContext(&#39;2d&#39;);
        this.particles = [];
        this.options = {
            particleCount: options.particleCount || 100,
            particleSize: options.particleSize || 2,
            particleColor: options.particleColor || &#39;#ffffff&#39;,
            particleSpeed: options.particleSpeed || 1,
            ...options
        };

        this.init();
    }

    init() {
        this.resize();
        this.createParticles();
        this.animate();

        window.addEventListener(&#39;resize&#39;, () =&gt; this.resize());
    }

    resize() {
        this.canvas.width = window.innerWidth;
        this.canvas.height = window.innerHeight;
    }

    createParticles() {
        for (let i = 0; i &lt; this.options.particleCount; i++) {
            this.particles.push({
                x: Math.random() * this.canvas.width,
                y: Math.random() * this.canvas.height,
                vx: (Math.random() - 0.5) * this.options.particleSpeed,
                vy: (Math.random() - 0.5) * this.options.particleSpeed,
                size: Math.random() * this.options.particleSize + 1
            });
        }
    }

    animate() {
        this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);

        this.particles.forEach(particle =&gt; {
            // 粒子の移動
            particle.x += particle.vx;
            particle.y += particle.vy;

            // 画面端での跳ね返り
            if (particle.x &lt; 0 || particle.x &gt; this.canvas.width) {
                particle.vx *= -1;
            }
            if (particle.y &lt; 0 || particle.y &gt; this.canvas.height) {
                particle.vy *= -1;
            }

            // 粒子の描画
            this.ctx.beginPath();
            this.ctx.arc(particle.x, particle.y, particle.size, 0, Math.PI * 2);
            this.ctx.fillStyle = this.options.particleColor;
            this.ctx.fill();
        });

        requestAnimationFrame(() =&gt; this.animate());
    }
}

// 初期化
document.addEventListener(&#39;DOMContentLoaded&#39;, () =&gt; {
    const canvas = document.getElementById(&#39;particleCanvas&#39;);
    new Particle(canvas, {
        particleCount: 100,
        particleSize: 2,
        particleColor: &#39;#ffffff&#39;,
        particleSpeed: 1
    });
});</code></pre></div>



<h3 class="wp-block-heading">⑤ カスタマイズ例</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-css" data-lang="CSS"><code>// カラフルなパーティクル
new Particle(canvas, {
    particleCount: 150,
    particleSize: 3,
    particleColor: &#39;#ff6b6b&#39;,
    particleSpeed: 2
});

// 大きなパーティクル
new Particle(canvas, {
    particleCount: 50,
    particleSize: 5,
    particleColor: &#39;#4ecdc4&#39;,
    particleSpeed: 0.5
});

// 高速パーティクル
new Particle(canvas, {
    particleCount: 200,
    particleSize: 1,
    particleColor: &#39;#45b7d1&#39;,
    particleSpeed: 3
});</code></pre></div>


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<h2 class="wp-block-heading">マウス追従パーティクル</h2>



<h3 class="wp-block-heading">① デモ</h3>



<p class="codepen" data-height="300" data-default-tab="html,result" data-slug-hash="OPyPZzV" data-pen-title="マウス追従パーティクル" data-user="lgshifbg-the-looper" style="height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;">
  <span>See the Pen <a href="https://codepen.io/lgshifbg-the-looper/pen/OPyPZzV">
  マウス追従パーティクル</a> by ケケンタ (<a href="https://codepen.io/lgshifbg-the-looper">@lgshifbg-the-looper</a>)
  on <a href="https://codepen.io">CodePen</a>.</span>
</p>
<script async src="https://public.codepenassets.com/embed/index.js"></script>



<div class="swell-block-capbox cap_box"><div class="cap_box_ttl"><span><span style="--the-icon-svg: url(data:image/svg+xml;base64,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)" data-icon="LsLightbulb" data-id="0" aria-hidden="true" class="swl-inline-icon"> </span> <strong>このパーティクルの特徴</strong></span></div><div class="cap_box_content">
<ul class="wp-block-list is-style-check_list -list-under-dashed">
<li>マウスカーソルを追従</li>



<li>インタラクティブな体験</li>



<li>ユーザーの動きに反応</li>
</ul>
</div></div>



<h3 class="wp-block-heading">② HTML</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-html" data-lang="HTML"><code>&lt;canvas id=&quot;particleCanvas&quot;&gt;&lt;/canvas&gt;
&lt;div class=&quot;content&quot;&gt;
    &lt;h1&gt;マウス追従パーティクル&lt;/h1&gt;
    &lt;p&gt;マウスを動かしてパーティクルを追従させてみてください&lt;/p&gt;
&lt;/div&gt;</code></pre></div>



<h3 class="wp-block-heading">③ CSS</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-css" data-lang="CSS"><code>body {
    margin: 0;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

canvas {
    display: block;
}

.content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 10;
}</code></pre></div>



<h3 class="wp-block-heading">④ JavaScript</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-js" data-lang="JavaScript"><code>class MouseParticle {
    constructor(canvas, options = {}) {
        this.canvas = canvas;
        this.ctx = canvas.getContext(&#39;2d&#39;);
        this.particles = [];
        this.mouse = { x: 0, y: 0 };
        this.options = {
            particleCount: options.particleCount || 50,
            particleSize: options.particleSize || 3,
            particleColor: options.particleColor || &#39;#ffffff&#39;,
            particleSpeed: options.particleSpeed || 0.1,
            ...options
        };

        this.init();
    }

    init() {
        this.resize();
        this.createParticles();
        this.animate();

        window.addEventListener(&#39;resize&#39;, () =&gt; this.resize());
        this.canvas.addEventListener(&#39;mousemove&#39;, (e) =&gt; {
            this.mouse.x = e.clientX;
            this.mouse.y = e.clientY;
        });
    }

    resize() {
        this.canvas.width = window.innerWidth;
        this.canvas.height = window.innerHeight;
    }

    createParticles() {
        for (let i = 0; i &lt; this.options.particleCount; i++) {
            this.particles.push({
                x: Math.random() * this.canvas.width,
                y: Math.random() * this.canvas.height,
                size: Math.random() * this.options.particleSize + 1
            });
        }
    }

    animate() {
        this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);

        this.particles.forEach(particle =&gt; {
            // マウスへの追従
            const dx = this.mouse.x - particle.x;
            const dy = this.mouse.y - particle.y;

            particle.x += dx * this.options.particleSpeed;
            particle.y += dy * this.options.particleSpeed;

            // 粒子の描画
            this.ctx.beginPath();
            this.ctx.arc(particle.x, particle.y, particle.size, 0, Math.PI * 2);
            this.ctx.fillStyle = this.options.particleColor;
            this.ctx.fill();
        });

        requestAnimationFrame(() =&gt; this.animate());
    }
}

// 初期化
document.addEventListener(&#39;DOMContentLoaded&#39;, () =&gt; {
    const canvas = document.getElementById(&#39;particleCanvas&#39;);
    new MouseParticle(canvas, {
        particleCount: 50,
        particleSize: 3,
        particleColor: &#39;#ff6b6b&#39;,
        particleSpeed: 0.1
    });
});</code></pre></div>


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<h2 class="wp-block-heading">星空パーティクル</h2>



<h3 class="wp-block-heading">① デモ</h3>



<p class="codepen" data-height="300" data-default-tab="html,result" data-slug-hash="wBKBjyG" data-pen-title="星空パーティクル" data-user="lgshifbg-the-looper" style="height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;">
  <span>See the Pen <a href="https://codepen.io/lgshifbg-the-looper/pen/wBKBjyG">
  星空パーティクル</a> by ケケンタ (<a href="https://codepen.io/lgshifbg-the-looper">@lgshifbg-the-looper</a>)
  on <a href="https://codepen.io">CodePen</a>.</span>
</p>
<script async src="https://public.codepenassets.com/embed/index.js"></script>



<div class="swell-block-capbox cap_box"><div class="cap_box_ttl"><span><span style="--the-icon-svg: url(data:image/svg+xml;base64,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)" data-icon="LsLightbulb" data-id="0" aria-hidden="true" class="swl-inline-icon"> </span> <strong>このパーティクルの特徴</strong></span></div><div class="cap_box_content">
<ul class="wp-block-list is-style-check_list -list-under-dashed">
<li>星空のような美しい演出</li>



<li>点滅効果付き</li>



<li>ロマンチックな雰囲気</li>
</ul>
</div></div>



<h3 class="wp-block-heading">② HTML</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-html" data-lang="HTML"><code>&lt;canvas id=&quot;particleCanvas&quot;&gt;&lt;/canvas&gt;
&lt;div class=&quot;content&quot;&gt;
    &lt;h1&gt;星空パーティクル&lt;/h1&gt;
    &lt;p&gt;美しい星空のような演出&lt;/p&gt;
&lt;/div&gt;</code></pre></div>



<h3 class="wp-block-heading">③ CSS</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-css" data-lang="CSS"><code>body {
    margin: 0;
    overflow: hidden;
    background: linear-gradient(135deg, #0c0c0c 0%, #1a1a2e 50%, #16213e 100%);
}

canvas {
    display: block;
}

.content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 10;
}</code></pre></div>



<h3 class="wp-block-heading">④ JavaScript</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-js" data-lang="JavaScript"><code>class StarParticle {
    constructor(canvas, options = {}) {
        this.canvas = canvas;
        this.ctx = canvas.getContext(&#39;2d&#39;);
        this.particles = [];
        this.options = {
            particleCount: options.particleCount || 200,
            particleSize: options.particleSize || 1,
            particleColor: options.particleColor || &#39;#ffffff&#39;,
            twinkleSpeed: options.twinkleSpeed || 0.02,
            ...options
        };

        this.init();
    }

    init() {
        this.resize();
        this.createParticles();
        this.animate();

        window.addEventListener(&#39;resize&#39;, () =&gt; this.resize());
    }

    resize() {
        this.canvas.width = window.innerWidth;
        this.canvas.height = window.innerHeight;
    }

    createParticles() {
        for (let i = 0; i &lt; this.options.particleCount; i++) {
            this.particles.push({
                x: Math.random() * this.canvas.width,
                y: Math.random() * this.canvas.height,
                size: Math.random() * this.options.particleSize + 0.5,
                opacity: Math.random(),
                twinkleDirection: Math.random() &gt; 0.5 ? 1 : -1
            });
        }
    }

    animate() {
        this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);

        this.particles.forEach(particle =&gt; {
            // 点滅効果
            particle.opacity += this.options.twinkleSpeed * particle.twinkleDirection;

            if (particle.opacity &gt; 1) {
                particle.opacity = 1;
                particle.twinkleDirection = -1;
            } else if (particle.opacity &lt; 0.1) {
                particle.opacity = 0.1;
                particle.twinkleDirection = 1;
            }

            // 粒子の描画
            this.ctx.beginPath();
            this.ctx.arc(particle.x, particle.y, particle.size, 0, Math.PI * 2);
            this.ctx.fillStyle = `rgba(255, 255, 255, ${particle.opacity})`;
            this.ctx.fill();
        });

        requestAnimationFrame(() =&gt; this.animate());
    }
}

// 初期化
document.addEventListener(&#39;DOMContentLoaded&#39;, () =&gt; {
    const canvas = document.getElementById(&#39;particleCanvas&#39;);
    new StarParticle(canvas, {
        particleCount: 200,
        particleSize: 1,
        particleColor: &#39;#ffffff&#39;,
        twinkleSpeed: 0.02
    });
});</code></pre></div>


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<h2 class="wp-block-heading">爆発パーティクル</h2>



<h3 class="wp-block-heading">① デモ</h3>



<p class="codepen" data-height="300" data-default-tab="html,result" data-slug-hash="ZYbYora" data-pen-title="爆発パーティクル" data-user="lgshifbg-the-looper" style="height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;">
  <span>See the Pen <a href="https://codepen.io/lgshifbg-the-looper/pen/ZYbYora">
  爆発パーティクル</a> by ケケンタ (<a href="https://codepen.io/lgshifbg-the-looper">@lgshifbg-the-looper</a>)
  on <a href="https://codepen.io">CodePen</a>.</span>
</p>
<script async src="https://public.codepenassets.com/embed/index.js"></script>



<div class="swell-block-capbox cap_box"><div class="cap_box_ttl"><span><span style="--the-icon-svg: url(data:image/svg+xml;base64,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)" data-icon="LsLightbulb" data-id="0" aria-hidden="true" class="swl-inline-icon"> </span> <strong>このパーティクルの特徴</strong></span></div><div class="cap_box_content">
<ul class="wp-block-list is-style-check_list -list-under-dashed">
<li>クリック時に爆発効果</li>



<li>インパクト大の演出</li>



<li>ゲーム的な要素</li>
</ul>
</div></div>



<h3 class="wp-block-heading">② HTML</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-html" data-lang="HTML"><code>&lt;canvas id=&quot;particleCanvas&quot;&gt;&lt;/canvas&gt;
&lt;div class=&quot;content&quot;&gt;
    &lt;h1&gt;爆発パーティクル&lt;/h1&gt;
    &lt;p&gt;画面をクリックして爆発効果を体験してください&lt;/p&gt;
&lt;/div&gt;</code></pre></div>



<h3 class="wp-block-heading">③ CSS</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-css" data-lang="CSS"><code>body {
    margin: 0;
    overflow: hidden;
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
}

canvas {
    display: block;
}

.content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 10;
}</code></pre></div>



<h3 class="wp-block-heading">④ JavaScript</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-js" data-lang="JavaScript"><code>class ExplosionParticle {
    constructor(canvas, options = {}) {
        this.canvas = canvas;
        this.ctx = canvas.getContext(&#39;2d&#39;);
        this.particles = [];
        this.explosions = [];
        this.options = {
            particleCount: options.particleCount || 30,
            particleSize: options.particleSize || 3,
            particleColor: options.particleColor || &#39;#ff6b6b&#39;,
            explosionSpeed: options.explosionSpeed || 5,
            ...options
        };

        this.init();
    }

    init() {
        this.resize();
        this.animate();

        window.addEventListener(&#39;resize&#39;, () =&gt; this.resize());
        this.canvas.addEventListener(&#39;click&#39;, (e) =&gt; {
            this.createExplosion(e.clientX, e.clientY);
        });
    }

    resize() {
        this.canvas.width = window.innerWidth;
        this.canvas.height = window.innerHeight;
    }

    createExplosion(x, y) {
        const particles = [];
        for (let i = 0; i &lt; this.options.particleCount; i++) {
            const angle = (Math.PI * 2 * i) / this.options.particleCount;
            const velocity = Math.random() * this.options.explosionSpeed + 2;

            particles.push({
                x: x,
                y: y,
                vx: Math.cos(angle) * velocity,
                vy: Math.sin(angle) * velocity,
                size: Math.random() * this.options.particleSize + 1,
                life: 1,
                decay: Math.random() * 0.02 + 0.01
            });
        }

        this.explosions.push(particles);
    }

    animate() {
        this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);

        // 爆発パーティクルの更新
        this.explosions.forEach((explosion, explosionIndex) =&gt; {
            explosion.forEach((particle, particleIndex) =&gt; {
                // 重力効果
                particle.vy += 0.1;

                // 位置更新
                particle.x += particle.vx;
                particle.y += particle.vy;

                // 寿命減少
                particle.life -= particle.decay;

                // 粒子の描画
                if (particle.life &gt; 0) {
                    this.ctx.beginPath();
                    this.ctx.arc(particle.x, particle.y, particle.size, 0, Math.PI * 2);
                    this.ctx.fillStyle = `rgba(255, 107, 107, ${particle.life})`;
                    this.ctx.fill();
                }
            });

            // 寿命が尽きた爆発を削除
            if (explosion.every(particle =&gt; particle.life &lt;= 0)) {
                this.explosions.splice(explosionIndex, 1);
            }
        });

        requestAnimationFrame(() =&gt; this.animate());
    }
}

// 初期化
document.addEventListener(&#39;DOMContentLoaded&#39;, () =&gt; {
    const canvas = document.getElementById(&#39;particleCanvas&#39;);
    new ExplosionParticle(canvas, {
        particleCount: 30,
        particleSize: 3,
        particleColor: &#39;#ff6b6b&#39;,
        explosionSpeed: 5
    });
});</code></pre></div>


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<h2 class="wp-block-heading">浮遊パーティクル</h2>



<h3 class="wp-block-heading">① デモ</h3>



<p class="codepen" data-height="300" data-default-tab="html,result" data-slug-hash="LEpEmQM" data-pen-title="浮遊パーティクル" data-user="lgshifbg-the-looper" style="height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;">
  <span>See the Pen <a href="https://codepen.io/lgshifbg-the-looper/pen/LEpEmQM">
  浮遊パーティクル</a> by ケケンタ (<a href="https://codepen.io/lgshifbg-the-looper">@lgshifbg-the-looper</a>)
  on <a href="https://codepen.io">CodePen</a>.</span>
</p>
<script async src="https://public.codepenassets.com/embed/index.js"></script>



<div class="swell-block-capbox cap_box"><div class="cap_box_ttl"><span><span style="--the-icon-svg: url(data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjFlbSIgd2lkdGg9IjFlbSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiBhcmlhLWhpZGRlbj0idHJ1ZSIgdmlld0JveD0iMCAwIDQ4IDQ4Ij48cGF0aCBkPSJNMzIgNDYuNUgxNmMtMS4xIDAtMi0uOS0yLTJzLjktMiAyLTJoMTZjMS4xIDAgMiAuOSAyIDJzLS45IDItMiAyek00MS43IDE1LjlDNDEuMyAxMyA0MCAxMC4zIDM4LjIgOCAzNC41IDMuMiAyOSAuOCAyMy4xIDEgMTQgMS40IDYuNSA4LjkgNiAxOGMtLjMgNiAyLjQgMTEuNyA3LjIgMTUuNC41LjQuOC45LjggMS41djEuNmMwIDIuMiAxLjggNCA0IDRoMTJjMi4yIDAgNC0xLjggNC00VjM1YzAtLjYuMy0xLjIuOS0xLjcgNS4zLTQgOC0xMC42IDYuOC0xNy40em0tNy4xIDEuN2gtLjNjLS43IDAtMS4zLS41LTEuNS0xLjItLjctMy4yLTMuMi01LjctNi40LTYuMy0uOC0uMS0xLjQtLjktMS4yLTEuN3MuOS0xLjQgMS43LTEuMmM0LjQuOCA4IDQuMiA4LjkgOC42LjEuOC0uNCAxLjYtMS4yIDEuOHoiPjwvcGF0aD48L3N2Zz4=)" data-icon="LsLightbulb" data-id="0" aria-hidden="true" class="swl-inline-icon"> </span> <strong>このパーティクルの特徴</strong></span></div><div class="cap_box_content">
<ul class="wp-block-list is-style-check_list -list-under-dashed">
<li>自然な浮遊運動</li>



<li>波のような動き</li>



<li>リラックス効果</li>
</ul>
</div></div>



<h3 class="wp-block-heading">② HTML</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-html" data-lang="HTML"><code>&lt;canvas id=&quot;particleCanvas&quot;&gt;&lt;/canvas&gt;
&lt;div class=&quot;content&quot;&gt;
    &lt;h1&gt;浮遊パーティクル&lt;/h1&gt;
    &lt;p&gt;自然な浮遊運動を体験してください&lt;/p&gt;
&lt;/div&gt;</code></pre></div>



<h3 class="wp-block-heading">③ CSS</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-css" data-lang="CSS"><code>body {
    margin: 0;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

canvas {
    display: block;
}

.content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 10;
}</code></pre></div>



<h3 class="wp-block-heading">④ JavaScript</h3>



<div class="hcb_wrap"><pre class="prism line-numbers lang-js" data-lang="JavaScript"><code>class FloatingParticle {
    constructor(canvas, options = {}) {
        this.canvas = canvas;
        this.ctx = canvas.getContext(&#39;2d&#39;);
        this.particles = [];
        this.time = 0;
        this.options = {
            particleCount: options.particleCount || 80,
            particleSize: options.particleSize || 2,
            particleColor: options.particleColor || &#39;#4ecdc4&#39;,
            floatSpeed: options.floatSpeed || 0.01,
            ...options
        };

        this.init();
    }

    init() {
        this.resize();
        this.createParticles();
        this.animate();

        window.addEventListener(&#39;resize&#39;, () =&gt; this.resize());
    }

    resize() {
        this.canvas.width = window.innerWidth;
        this.canvas.height = window.innerHeight;
    }

    createParticles() {
        for (let i = 0; i &lt; this.options.particleCount; i++) {
            this.particles.push({
                x: Math.random() * this.canvas.width,
                y: Math.random() * this.canvas.height,
                size: Math.random() * this.options.particleSize + 1,
                angle: Math.random() * Math.PI * 2,
                speed: Math.random() * 0.5 + 0.5,
                amplitude: Math.random() * 50 + 20
            });
        }
    }

    animate() {
        this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);

        this.particles.forEach(particle =&gt; {
            // 浮遊運動
            particle.angle += this.options.floatSpeed * particle.speed;

            const floatX = Math.sin(particle.angle) * particle.amplitude;
            const floatY = Math.cos(particle.angle * 0.5) * particle.amplitude * 0.5;

            // 位置更新
            particle.x += floatX * 0.01;
            particle.y += floatY * 0.01;

            // 画面端での処理
            if (particle.x &lt; 0) particle.x = this.canvas.width;
            if (particle.x &gt; this.canvas.width) particle.x = 0;
            if (particle.y &lt; 0) particle.y = this.canvas.height;
            if (particle.y &gt; this.canvas.height) particle.y = 0;

            // 粒子の描画
            this.ctx.beginPath();
            this.ctx.arc(particle.x, particle.y, particle.size, 0, Math.PI * 2);
            this.ctx.fillStyle = this.options.particleColor;
            this.ctx.fill();
        });

        this.time += this.options.floatSpeed;
        requestAnimationFrame(() =&gt; this.animate());
    }
}

// 初期化
document.addEventListener(&#39;DOMContentLoaded&#39;, () =&gt; {
    const canvas = document.getElementById(&#39;particleCanvas&#39;);
    new FloatingParticle(canvas, {
        particleCount: 80,
        particleSize: 2,
        particleColor: &#39;#4ecdc4&#39;,
        floatSpeed: 0.01
    });
});</code></pre></div>


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<h2 class="wp-block-heading">Q&amp;A</h2>



<dl class="swell-block-faq -icon-circle" data-q="fill-custom" data-a="fill-main">
<div class="swell-block-faq__item"><dt class="faq_q">基本的なパーティクルと浮遊パーティクルの違いは何ですか？</dt><dd class="faq_a">
<p class="wp-block-paragraph">2つのパーティクル効果には以下のような違いがあります。</p>



<h4 class="wp-block-heading"><strong>動きの違い</strong></h4>



<p class="is-style-balloon_box2 wp-block-paragraph"><strong>基本的なパーティクル</strong></p>



<ul class="wp-block-list is-style-check_list">
<li>直線的に移動し、画面端で跳ね返る</li>



<li>固定速度（vx, vy）で規則的な動き</li>



<li class="u-mb-ctrl u-mb-30">機械的で予測可能な軌道</li>
</ul>



<p class="is-style-balloon_box2 wp-block-paragraph"><strong>浮遊パーティクル</strong></p>



<ul class="wp-block-list is-style-check_list">
<li>正弦波と余弦波を使用した波のような浮遊運動</li>



<li>変化する速度で自然な曲線を描く</li>



<li>有機的でリラックス効果のある動き</li>
</ul>



<h4 class="wp-block-heading"><strong>技術的な違い</strong></h4>



<figure class="wp-block-table"><table class="has-fixed-layout"><thead><tr><th>項目</th><th>基本的なパーティクル</th><th>浮遊パーティクル</th></tr></thead><tbody><tr><td><strong>動きパターン</strong></td><td>直線運動 + 跳ね返り</td><td>正弦波 + 余弦波</td></tr><tr><td><strong>速度</strong></td><td>固定速度（vx, vy）</td><td>変化する速度（sin/cos）</td></tr><tr><td><strong>方向</strong></td><td>画面端で反転</td><td>連続的な方向変化</td></tr><tr><td><strong>軌道</strong></td><td>直線的</td><td>曲線的・波状</td></tr><tr><td><strong>自然さ</strong></td><td>機械的</td><td>有機的</td></tr></tbody></table></figure>



<h4 class="wp-block-heading"><strong>実装の違い</strong></h4>



<p class="is-style-balloon_box wp-block-paragraph"><strong>基本的なパーティクル</strong></p>



<div class="hcb_wrap u-mb-ctrl u-mb-30"><pre class="prism line-numbers lang-js" data-lang="JavaScript"><code>// シンプルな物理演算
particles.push({
    x: Math.random() * this.canvas.width,
    y: Math.random() * this.canvas.height,
    vx: (Math.random() - 0.5) * this.options.particleSpeed,  // 固定速度
    vy: (Math.random() - 0.5) * this.options.particleSpeed,  // 固定速度
    size: Math.random() * this.options.particleSize + 1
});</code></pre></div>



<p class="is-style-balloon_box wp-block-paragraph"><strong>浮遊パーティクル</strong></p>



<div class="hcb_wrap"><pre class="prism line-numbers lang-js" data-lang="JavaScript"><code>// 複雑な浮遊パラメータ
particles.push({
    x: Math.random() * this.canvas.width,
    y: Math.random() * this.canvas.height,
    size: Math.random() * this.options.particleSize + 1,
    angle: Math.random() * Math.PI * 2,        // 角度
    speed: Math.random() * 0.5 + 0.5,          // 個別速度
    amplitude: Math.random() * 50 + 20         // 振幅
});</code></pre></div>



<h4 class="wp-block-heading"><strong>使い分けのポイント</strong></h4>



<p class="is-style-balloon_box2 wp-block-paragraph"><strong>基本的なパーティクルを使う場面</strong></p>



<ul class="wp-block-list is-style-check_list">
<li>シンプルで洗練された印象を出したい</li>



<li>パフォーマンスを重視する</li>



<li>規則的で予測可能な動きが求められる</li>



<li class="u-mb-ctrl u-mb-30">ビジネス系サイトの背景</li>
</ul>



<p class="is-style-balloon_box2 wp-block-paragraph"><strong>浮遊パーティクルを使う場面</strong></p>



<ul class="wp-block-list is-style-check_list">
<li>自然で有機的な印象を出したい</li>



<li>リラックス効果を求められる</li>



<li>癒し系サイトやアート系サイト</li>



<li>より複雑で魅力的な動きが求められる</li>
</ul>
</dd></div>



<div class="swell-block-faq__item"><dt class="faq_q">パーティクル効果のパフォーマンスを最適化するには？</dt><dd class="faq_a">
<p class="u-mb-ctrl u-mb-30 wp-block-paragraph">以下のポイントに注意してパフォーマンスを最適化できます。</p>



<p class="is-style-balloon_box2 wp-block-paragraph"><strong>パーティクル数の調整</strong></p>



<ul class="wp-block-list is-style-check_list">
<li>デスクトップ: 100個以下を推奨</li>



<li>モバイル: 50個以下に調整</li>



<li class="u-mb-ctrl u-mb-30">低スペックデバイス: 30個以下</li>
</ul>



<p class="is-style-balloon_box2 wp-block-paragraph"><strong>描画の最適化</strong></p>



<div class="hcb_wrap"><pre class="prism line-numbers lang-js" data-lang="JavaScript"><code>// 画面外のパーティクルは描画しない
if (particle.x &gt; 0 && particle.x &lt; this.canvas.width && 
    particle.y &gt; 0 && particle.y &lt; this.canvas.height) {
    // 描画処理
}</code></pre></div>
</dd></div>



<div class="swell-block-faq__item"><dt class="faq_q">パーティクル効果をレスポンシブ対応させるには？</dt><dd class="faq_a">
<p class="wp-block-paragraph">画面サイズに応じてパーティクル数を調整します。</p>



<div class="hcb_wrap"><pre class="prism line-numbers lang-js" data-lang="JavaScript"><code>class ResponsiveParticle {
    constructor(canvas, options = {}) {
        this.canvas = canvas;
        this.ctx = canvas.getContext(&#39;2d&#39;);
        this.particles = [];
        this.options = options;

        this.init();
    }

    init() {
        this.resize();
        this.createParticles();
        this.animate();

        window.addEventListener(&#39;resize&#39;, () =&gt; {
            this.resize();
            this.createParticles(); // パーティクルを再生成
        });
    }

    resize() {
        this.canvas.width = window.innerWidth;
        this.canvas.height = window.innerHeight;

        // 画面サイズに応じてパーティクル数を調整
        const screenArea = this.canvas.width * this.canvas.height;
        const baseCount = 100;
        const mobileCount = 50;

        if (screenArea &lt; 500000) { // モバイル判定
            this.options.particleCount = mobileCount;
        } else {
            this.options.particleCount = baseCount;
        }
    }
}</code></pre></div>
</dd></div>
</dl>


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<h2 class="wp-block-heading">まとめ</h2>



<p class="wp-block-paragraph">今回ご紹介した<strong>5種類のパーティクル効果</strong>はいかがでしたでしょうか？</p>


<div class="swell-block-balloon"><div class="c-balloon -bln-left" data-col="gray"><div class="c-balloon__icon -circle"><img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="https://kekenta-it-blog.com/wp-content/uploads/2023/07/キリッ-150x150.jpg" alt="" class="lazyload c-balloon__iconImg" width="80px" height="80px"><noscript><img decoding="async" src="https://kekenta-it-blog.com/wp-content/uploads/2023/07/キリッ-150x150.jpg" alt="" class="c-balloon__iconImg" width="80px" height="80px"></noscript><span class="c-balloon__iconName">ケケンタ</span></div><div class="c-balloon__body -speaking -border-on"><div class="c-balloon__text">
<p>それぞれのパーティクル効果には特徴があり、用途に応じて使い分けることで、より魅力的なWebサイトを作成できます。</p>
<span class="c-balloon__shapes"><span class="c-balloon__before"></span><span class="c-balloon__after"></span></span></div></div></div></div>


<p class="is-style-balloon_box u-mb-ctrl u-mb-10 wp-block-paragraph"><strong>用途別おすすめパーティクル効果</strong></p>



<ul class="wp-block-list is-style-check_list">
<li><strong>ランディングページ</strong>: 基本的なパーティクル or 浮遊パーティクル</li>



<li><strong>ポートフォリオサイト</strong>: マウス追従パーティクル</li>



<li><strong>イベントページ</strong>: 星空パーティクル</li>



<li><strong>ゲームサイト</strong>: 爆発パーティクル</li>



<li class="u-mb-ctrl u-mb-30"><strong>リラックス系サイト</strong>: 浮遊パーティクル</li>
</ul>



<p class="is-style-balloon_box u-mb-ctrl u-mb-10 wp-block-paragraph"><strong>パフォーマンスのポイント</strong></p>



<ul class="wp-block-list is-style-check_list">
<li>パーティクル数は100個以下を推奨</li>



<li>モバイルデバイスでは50個以下に調整</li>



<li><code>requestAnimationFrame</code>を使用してスムーズなアニメーション</li>



<li class="u-mb-ctrl u-mb-30">不要なパーティクルは適切に削除</li>
</ul>



<p class="u-mb-ctrl u-mb-10 is-style-balloon_box wp-block-paragraph"><strong>カスタマイズのコツ</strong></p>



<ul class="wp-block-list is-style-check_list">
<li>色やサイズを調整してサイトのテーマに合わせる</li>



<li>速度を調整してユーザビリティを確保</li>



<li>透明度を活用して奥行きを表現</li>



<li class="u-mb-ctrl u-mb-30">重力や風の効果を追加してリアル感を演出</li>
</ul>


<div class="swell-block-balloon"><div class="c-balloon -bln-left" data-col="gray"><div class="c-balloon__icon -circle"><img decoding="async" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" data-src="https://kekenta-it-blog.com/wp-content/uploads/2023/11/kekenta-icon-150x150.jpg" alt="" class="lazyload c-balloon__iconImg" width="80px" height="80px"><noscript><img decoding="async" src="https://kekenta-it-blog.com/wp-content/uploads/2023/11/kekenta-icon-150x150.jpg" alt="" class="c-balloon__iconImg" width="80px" height="80px"></noscript><span class="c-balloon__iconName">ケケンタ</span></div><div class="c-balloon__body -speaking -border-on"><div class="c-balloon__text">
<p>これらのパーティクル効果を組み合わせることで、さらに魅力的なアニメーションを作成できます。ぜひご自身のプロジェクトに合わせてカスタマイズしてみてください！</p>
<span class="c-balloon__shapes"><span class="c-balloon__before"></span><span class="c-balloon__after"></span></span></div></div></div></div>


<p class="wp-block-paragraph">このブログではWeb制作やWordpressなどの情報を発信しています。ご興味のある方はほかの記事もご覧いただけるとうれしいです！</p>



<p class="wp-block-paragraph">それでは、最後までご覧いただきありがとうございました！</p>



<p class="is-style-balloon_box wp-block-paragraph"><span data-icon="LsBookmark" data-id="0" style="--the-icon-svg: url(data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjFlbSIgd2lkdGg9IjFlbSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiBhcmlhLWhpZGRlbj0idHJ1ZSIgdmlld0JveD0iMCAwIDQ4IDQ4Ij48cGF0aCBkPSJNMTAgM2gyOGMxLjEgMCAyIC45IDIgMnYzOS42YzAgLjktMS4xIDEuMy0xLjcuN0wyNCAzMSA5LjcgNDUuM2MtLjYuNi0xLjcuMi0xLjctLjdWNWMwLTEuMS45LTIgMi0yeiI+PC9wYXRoPjwvc3ZnPg==)" aria-hidden="true" class="swl-inline-icon"> </span> <strong>あわせて読みたい</strong></p>


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<div class="p-blogParts post_content" data-partsID="10246">
<h2 class="wp-block-heading">もっと効率的にWeb制作を学びたい方へ</h2>



<p class="wp-block-paragraph">Web制作の学習は楽しいものですが、一人で進めていると「これで合っているのかな？」と不安になることもありますよね。</p>



<p class="wp-block-paragraph">僕も独学でWeb制作を学んできましたが、今思うと「もっと早く知りたかった」と思うことがたくさんあります。</p>



<p class="wp-block-paragraph">特に以下のような方は、一度プログラミングスクールの利用を検討してみることをおすすめします。</p>



<ul class="wp-block-list is-style-check_list">
<li>学習の方向性に迷いがある方</li>



<li>効率的にスキルを身につけたい方</li>



<li>転職や副業でWeb制作を活用したい方</li>



<li>挫折経験がある方</li>
</ul>



<p class="wp-block-paragraph">忍者CODEなら、<strong>業界最安値</strong>で24時間サポート付きの学習環境が整っています。</p>



<p class="is-style-icon_announce wp-block-paragraph">ご興味のある方は、<a href="https://kekenta-it-blog.com/ninja-code-web-production-school-guide/" data-type="post" data-id="15595">こちら</a>の記事で詳しくご紹介しています。</p>


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					<span class="p-blogCard__caption">あわせて読みたい</span>
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						<a class="p-blogCard__title" href="https://kekenta-it-blog.com/ninja-code-web-production-school-guide/">忍者CODEでWeb制作を学ぶべき理由【業界最安値で挫折しない学習環境】</a>
						<span class="p-blogCard__excerpt">Web制作を学びたいけど、プログラミングスクールは高すぎるし、独学だと挫折しそうで不安…… このような悩みをお持ちの方に向けて、この記事では 業界最安値でWeb制作を...</span>					</div>
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<h2 class="wp-block-heading">関連記事</h2>


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<h3 class="wp-block-heading">基本的なアニメーション</h3>



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<h3 class="wp-block-heading">スクロール系</h3>



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<h3 class="wp-block-heading">メニュー・タブ・ナビゲーション</h3>



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<p class="has-text-align-center u-mb-ctrl u-mb-0 wp-block-paragraph"><strong><span class="swl-fz u-fz-s">＼</span></strong><strong><span class="swl-fz u-fz-s">どれを読むか迷ったときのおすすめ‼／</span></strong></p>



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<h3 class="wp-block-heading">フォーム・UI要素</h3>



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<p class="has-text-align-center u-mb-ctrl u-mb-0 wp-block-paragraph"><strong><span class="swl-fz u-fz-s">＼</span></strong><strong><span class="swl-fz u-fz-s">どれを読むか迷ったときのおすすめ‼／</span></strong></p>



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<h3 class="wp-block-heading">ボタン・アイコン</h3>



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<p class="has-text-align-center u-mb-ctrl u-mb-0 wp-block-paragraph"><strong><span class="swl-fz u-fz-s">＼</span></strong><strong><span class="swl-fz u-fz-s">どれを読むか迷ったときのおすすめ‼／</span></strong></p>



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<h3 class="wp-block-heading">テキスト</h3>



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<li class="swell-block-linkList__item"><a class="swell-block-linkList__link" href="https://kekenta-it-blog.com/text-fade-animations-guide/"><svg xmlns="http://www.w3.org/2000/svg" class="swl-svg-arrowCircleRight swell-block-linkList__icon -right" width="1em" height="1em" viewBox="0 0 48 48" role="img" aria-hidden="true" focusable="false"><path d="M24 45C12.4 45 3 35.6 3 24S12.4 3 24 3s21 9.4 21 21-9.4 21-21 21zm0-39C14.1 6 6 14.1 6 24s8.1 18 18 18 18-8.1 18-18S33.9 6 24 6z" /><path d="m34.3 22.9-8.8-8.8c-.6-.6-1.5-.6-2.1 0s-.6 1.5 0 2.1l6.3 6.3H14.8c-.8 0-1.5.7-1.5 1.5s.7 1.5 1.5 1.5h14.8l-6.3 6.3c-.6.6-.6 1.5 0 2.1s1.5.6 2.1 0l8.8-8.8c.7-.6.7-1.6.1-2.2z" /></svg><span class="swell-block-linkList__text">テキストフェードアニメーション完全ガイド｜5種類</span></a></li>



<li class="swell-block-linkList__item"><a class="swell-block-linkList__link" href="https://kekenta-it-blog.com/three-d-text-animations-guide/"><svg xmlns="http://www.w3.org/2000/svg" class="swl-svg-arrowCircleRight swell-block-linkList__icon -right" width="1em" height="1em" viewBox="0 0 48 48" role="img" aria-hidden="true" focusable="false"><path d="M24 45C12.4 45 3 35.6 3 24S12.4 3 24 3s21 9.4 21 21-9.4 21-21 21zm0-39C14.1 6 6 14.1 6 24s8.1 18 18 18 18-8.1 18-18S33.9 6 24 6z" /><path d="m34.3 22.9-8.8-8.8c-.6-.6-1.5-.6-2.1 0s-.6 1.5 0 2.1l6.3 6.3H14.8c-.8 0-1.5.7-1.5 1.5s.7 1.5 1.5 1.5h14.8l-6.3 6.3c-.6.6-.6 1.5 0 2.1s1.5.6 2.1 0l8.8-8.8c.7-.6.7-1.6.1-2.2z" /></svg><span class="swell-block-linkList__text">3Dテキストアニメーション完全ガイド｜5種類</span></a></li>
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<p class="has-text-align-center u-mb-ctrl u-mb-0 wp-block-paragraph"><strong><span class="swl-fz u-fz-s">＼</span></strong><strong><span class="swl-fz u-fz-s">どれを読むか迷ったときのおすすめ‼／</span></strong></p>



<ul class="swell-block-linkList is-style-button" style="--the-color:var(--color_main)">
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<h3 class="wp-block-heading">スライダー</h3>



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<h3 class="wp-block-heading">特殊効果</h3>



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