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更新:2023/11/11

Particles.jsで遊ぶ！基本的な使い方を説明

今回は背景をいじることができるparticles.jsで遊んでいきたいと思います！

目次

1. particle.jsとは？

particles.jsは背景をいじることができるjavascriptのライブラリの一つです。

2. 使い方

particles.jsに移動して右上のツールバーをいじるとパーティクルが変化します。

3. とりあえず作ってみた!

3.1. 雪みたいな感じ

3.2. コード

<!DOCTYPE html>
    <html lang="ja">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Snow</title>
        <style>/* ---- reset ---- */ body{ margin:0; font:normal 75% Arial, Helvetica, sans-serif; } canvas{ display: block; vertical-align: bottom; } /* ---- particles.js container ---- */ #particles-js{ position:absolute; width: 100%; height: 100%; background-color: #4f6070; background-image: url(""); background-repeat: no-repeat; background-size: cover; background-position: 50% 50%; } /* ---- stats.js ---- */ .count-particles{ background: #000022; position: absolute; top: 48px; left: 0; width: 80px; color: #13E8E9; font-size: .8em; text-align: left; text-indent: 4px; line-height: 14px; padding-bottom: 2px; font-family: Helvetica, Arial, sans-serif; font-weight: bold; } .js-count-particles{ font-size: 1.1em; } #stats, .count-particles{ -webkit-user-select: none; margin-top: 5px; margin-left: 5px; } #stats{ border-radius: 3px 3px 0 0; overflow: hidden; } .count-particles{ border-radius: 0 0 3px 3px; }</style>
    </head>
    <body>
        <!-- particles.js container --> 
        <div id="particles-js"></div> 
        <!-- stats - count particles --> 
        <div class="count-particles"> <span class="js-count-particles">--</span> 
            particles
        </div> 
        <!-- particles.js lib - https://github.com/VincentGarreau/particles.js --> <script src="https://cdn.jsdelivr.net/particles.js/2.0.0/particles.min.js"></script> 
        <script>particlesJS("particles-js", {"particles":{"number":{"value":341,"density":{"enable":true,"value_area":800}},"color":{"value":"#ffffff"},"shape":{"type":"circle","stroke":{"width":0,"color":"#000000"},"polygon":{"nb_sides":3},"image":{"src":"img/github.svg","width":100,"height":100}},"opacity":{"value":0.5,"random":false,"anim":{"enable":false,"speed":1,"opacity_min":0.1,"sync":false}},"size":{"value":3,"random":true,"anim":{"enable":false,"speed":40,"size_min":0.1,"sync":false}},"line_linked":{"enable":false,"distance":150,"color":"#ffffff","opacity":0.4,"width":1},"move":{"enable":true,"speed":6,"direction":"bottom","random":false,"straight":false,"out_mode":"out","bounce":false,"attract":{"enable":false,"rotateX":600,"rotateY":1200}}},"interactivity":{"detect_on":"canvas","events":{"onhover":{"enable":true,"mode":"repulse"},"onclick":{"enable":true,"mode":"push"},"resize":true},"modes":{"grab":{"distance":400,"line_linked":{"opacity":1}},"bubble":{"distance":400,"size":40,"duration":2,"opacity":8,"speed":3},"repulse":{"distance":200,"duration":0.4},"push":{"particles_nb":4},"remove":{"particles_nb":2}}},"retina_detect":true});</script>
    </body>
    </html>

3.3. 星の散乱

3.4. コード

    <!DOCTYPE html>
        <html lang="ja">
        <head>
            <meta charset="UTF-8">
            <meta name="viewport" content="width=device-width, initial-scale=1.0">
            <title>Star</title>
            <style>/* ---- reset ---- */ body{ margin:0; font:normal 75% Arial, Helvetica, sans-serif; } canvas{ display: block; vertical-align: bottom; } /* ---- particles.js container ---- */ #particles-js{ position:absolute; width: 100%; height: 100%; background-color: #159b8b; background-image: url(""); background-repeat: no-repeat; background-size: cover; background-position: 50% 50%; } /* ---- stats.js ---- */ .count-particles{ background: #000022; position: absolute; top: 48px; left: 0; width: 80px; color: #13E8E9; font-size: .8em; text-align: left; text-indent: 4px; line-height: 14px; padding-bottom: 2px; font-family: Helvetica, Arial, sans-serif; font-weight: bold; } .js-count-particles{ font-size: 1.1em; } #stats, .count-particles{ -webkit-user-select: none; margin-top: 5px; margin-left: 5px; } #stats{ border-radius: 3px 3px 0 0; overflow: hidden; } .count-particles{ border-radius: 0 0 3px 3px; }</style>
        </head>
        <body>
            <!-- particles.js container --> 
            <div id="particles-js"></div> 
            <!-- stats - count particles --> 
            <div class="count-particles"> <span class="js-count-particles">--</span> 
                particles
            </div> 
            <!-- particles.js lib - https://github.com/VincentGarreau/particles.js --> <script src="https://cdn.jsdelivr.net/particles.js/2.0.0/particles.min.js"></script> 
            <script>particlesJS("particles-js", {"particles":{"number":{"value":80,"density":{"enable":true,"value_area":800}},"color":{"value":"#218934"},"shape":{"type":"star","stroke":{"width":1,"color":"#000000"},"polygon":{"nb_sides":5},"image":{"src":"img/github.svg","width":100,"height":100}},"opacity":{"value":0.5,"random":false,"anim":{"enable":false,"speed":1,"opacity_min":0.1,"sync":false}},"size":{"value":92.19619349976756,"random":true,"anim":{"enable":false,"speed":40,"size_min":0.1,"sync":false}},"line_linked":{"enable":true,"distance":268.3101981549727,"color":"#ffffff","opacity":0.4,"width":1},"move":{"enable":true,"speed":6,"direction":"top-right","random":false,"straight":false,"out_mode":"out","bounce":false,"attract":{"enable":false,"rotateX":600,"rotateY":1200}}},"interactivity":{"detect_on":"canvas","events":{"onhover":{"enable":true,"mode":"repulse"},"onclick":{"enable":true,"mode":"push"},"resize":true},"modes":{"grab":{"distance":400,"line_linked":{"opacity":1}},"bubble":{"distance":400,"size":40,"duration":2,"opacity":8,"speed":3},"repulse":{"distance":200,"duration":0.4},"push":{"particles_nb":4},"remove":{"particles_nb":2}}},"retina_detect":true});</script>
        </body>
        </html>
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