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Html <canvas id="canvas"></canvas> JavaScript let canvas = document.querySelector('#canvas') let width = 1024; let height = 768; canvas.setAttribute('width',width) canvas.setAttribute('...

阿里云图标首页背景–星空特效 效果 代码 <canvas id="_bgcanvas" style="position: fixed;z-index:-1"></canvas> <script> /** * * @param {string} element canvas 元素 * @param {int} width 宽 * ...