JS片段：如何将文本复制到剪贴板

在构建网站时，一个非常普遍的需求是能够通过单击按钮将文本复制到剪贴板。在现代浏览器中，使用navigator.clipboardAPI 访问系统剪切板，利用clipboard.writeText复制到剪贴板，再通过clipboard.readText获取剪贴板内容即可实现。

实现效果

复制到剪贴板

源码

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>Document</title><style>.copy {width: 300px;height: 100px;border: 1px solid saddlebrown;}</style></head><body><p>这是待复制的内容：如何将文本复制到剪贴板</p><button id="once">一键复制</button><button id="content">展示剪贴板内容</button><p class="copy"></p><script>const copyToClipboard = (str) => {if (navigator?.clipboard?.writeText) {return navigator?.clipboard?.writeText(str);}return Promise.reject();};const getCopyClipboard = () => {return navigator.clipboard.readText();};const btn = document.querySelector("#content");const p = document.querySelector(".copy");const once = document.querySelector('#once');once.addEventListener('click', (str) => {const p = document.querySelector('p');copyToClipboard(p.innerText).then(() => {alert('复制成功');})});btn.addEventListener("click", async () => {const copyContent = await getCopyClipboard();p.innerHTML = copyContent;});</script></body>
</html>