我使用的是ReactJS，当用户点击一个链接时，我想复制一些文本到剪贴板。
我使用Chrome 52，我不需要支持任何其他浏览器。
我不明白为什么这段代码没有导致数据被复制到剪贴板。(代码片段的来源是Reddit的一篇帖子)。
我做错了吗?谁能建议有一个“正确”的方法来实现复制到剪贴板使用reactjs?
copyToClipboard = (text) => {
console.log('text', text)
var textField = document.createElement('textarea')
textField.innerText = text
document.body.appendChild(textField)
textField.select()
document.execCommand('copy')
textField.remove()
}
当前回答
你也可以在函数组件或无状态组件中使用react钩子: PS:确保你通过npm/yarn使用这个命令安装useClippy: NPM安装使用clippy或 纱线添加使用夹头
import React from 'react';
import useClippy from 'use-clippy';
export default function YourComponent() {
// clipboard is the contents of the user's clipboard.
// setClipboard('new value') wil set the contents of the user's clipboard.
const [clipboard, setClipboard] = useClippy();
return (
<div>
{/* Button that demonstrates reading the clipboard. */}
<button
onClick={() => {
alert(`Your clipboard contains: ${clipboard}`);
}}
>
Read my clipboard
</button>
{/* Button that demonstrates writing to the clipboard. */}
<button
onClick={() => {
setClipboard(`Random number: ${Math.random()}`);
}}
>
Copy something
</button>
</div>
);
}
其他回答
您绝对应该考虑使用上面建议的@Shubham这样的包，但我基于您所描述的创建了一个可用的代码依赖:http://codepen.io/dtschust/pen/WGwdVN?editors=1111。它可以在我的浏览器chrome中工作，也许你可以看到我在那里做了什么你错过了，或者你的应用程序中有一些扩展的复杂性阻止了它的工作。
// html
<html>
<body>
<div id="container">
</div>
</body>
</html>
// js
const Hello = React.createClass({
copyToClipboard: () => {
var textField = document.createElement('textarea')
textField.innerText = 'foo bar baz'
document.body.appendChild(textField)
textField.select()
document.execCommand('copy')
textField.remove()
},
render: function () {
return (
<h1 onClick={this.copyToClipboard}>Click to copy some text</h1>
)
}
})
ReactDOM.render(
<Hello/>,
document.getElementById('container'))
import React, { Component } from 'react';
export default class CopyTextOnClick extends Component {
copyText = () => {
this.refs.input.select();
document.execCommand('copy');
return false;
}
render () {
const { text } = this.state;
return (
<button onClick={ this.copyText }>
{ text }
<input
ref="input"
type="text"
defaultValue={ text }
style={{ position: 'fixed', top: '-1000px' }} />
</button>
)
}
}
针对React开发者
const preventCopyPasteBody = (state) => {
document.addEventListener(state, (evt) => {
if (evt.target.id === 'body') {
evt.preventDefault();
return false;
}
return false;
}, false);
}
preventCopyPasteBody ("contextmenu")
preventCopyPasteBody ("copy")
preventCopyPasteBody ("paste")
preventCopyPasteBody ("cut")
<Typography id="body" variant="body1" component="div" className={classes.text} style={{ fontSize: fontSize }}>{story}</Typography>
受@nate回答的启发，我创建了一个withCopyText反应钩子。并且，添加了navigator.clipboard.writeText支持execCommand回退。
钩子意味着它可以跨许多组件重用，而无需重复代码。有关实现，请参阅示例组件CopyText。
import React, { useRef, useState } from 'react';
const withCopyText = (textElementRef) => {
if (!textElementRef) throw 'withCopyText: ref is required';
const [copyStatus, setCopyStatus] = useState('');
const [support, setSupport] = useState({
navigatorClipboard: !!navigator.clipboard,
exec: !!document.queryCommandSupported('copy'),
});
const copyToClipboard = (e) => {
if ('' !== copyStatus) {
setCopyStatus('');
await new Promise((resolve) => setTimeout(resolve, 200));
}
// clipboard.writeText has wide but not 100% support
// https://caniuse.com/?search=writeText
if (support.navigatorClipboard) {
try {
navigator.clipboard.writeText(textElementRef.current.value);
return setCopyStatus('success');
} catch (e) {
setSupport({ ...support, navigatorClipboard: false });
}
}
// execCommand has > 97% support but is deprecated, use it as a fallback
// https://caniuse.com/?search=execCommand
// https://developer.mozilla.org/en-US/docs/Web/API/Document/execCommand
if (!support.navigatorClipboard) {
try {
textElementRef.current.select();
document.execCommand('copy');
e.target.focus();
setCopyStatus('success');
} catch (e) {
setSupport({ ...support, exec: false });
return setCopyStatus('fail');
}
}
};
return {
copyStatus,
copyToClipboard,
support: Object.values(support).includes(true),
};
};
const CopyText = ({ text }) => {
const textElementRef = useRef(null);
const { copyStatus, copyToClipboard, support } = withCopyText(textElementRef);
return (
<span>
{support && <button onClick={copyToClipboard}>Copy</button>}
{'success' === copyStatus && <span>Copied to clipboard!</span>}
{'fail' === copyStatus && <span>Sorry, copy to clipboard failed</span>}
<input type="text" ref={textElementRef} value={text} readOnly={true} />
</span>
);
};
export { CopyText, withCopyText };
首先创建BTN，然后添加这个onClick:
onClick={() => navigator.clipboard.writeText(textState)}
or
onClick={() => navigator.clipboard.writeText('Your text for copy')}
