作者 | Alexander T. Williams译者 | 平川策划 | Tina本文最初发布于 THENEWSTACK 博客。来自 Unsplash+，由 Katelyn Perry 上传长期以来，JavaScript 一直是现代 Web 的主角 ...

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Using CSS and JavaScript, you can dynamically change the background on your website. You use the code to change the background each time a user loads the website into ...