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
make a componant as follows :-
//react functional componant
import React, { useState } from "react";
function CopyToClipboard(props) {
const [copied, setCopied] = useState("copy");
return (
<div
className="font-medium mr-4 text-green-700 cursor-pointer"
onClick={() => {
navigator.clipboard.writeText(props.text);
setCopied("copied");
}}>
{copied}
</div>
);
}
export default CopyToClipboard;
//then use this componant anywhere
<CopyToClipboard text={"text you want to copy"}></CopyToClipboard>
//it will give a text saying "copy"`enter code here` and after clicking on that text, text provided with props will get copied
其他回答
您可以使用事件clipboardData收集方法e.clipboardData。setData(类型、内容)。
在我看来，这是实现在剪贴板内推送一些东西的最直接的方法，看看这个(我用它来修改数据，而本地复制动作):
...
handleCopy = (e) => {
e.preventDefault();
e.clipboardData.setData('text/plain', 'Hello, world!');
}
render = () =>
<Component
onCopy={this.handleCopy}
/>
我选择了这个路径:https://developer.mozilla.org/en-US/docs/Web/Events/copy
干杯!
编辑:出于测试目的，我添加了代码依赖:https://codepen.io/dprzygodzki/pen/ZaJMKb
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 };
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'))
您可以使用useRef选择元素中的文本，然后将其复制到剪贴板
import React, { useRef } from "react";
const Comp = () => {
const copyTxt = useRef();
const handleCopyTxt = () => {
let txtDiv = copyTxt.current;
if (document.selection) {
// IE
var range = document.body.createTextRange();
range.moveToElementText(txtDiv);
range.select();
} else if (window.getSelection) {
// other browsers
var range = document.createRange();
range.selectNode(txtDiv);
window.getSelection().removeAllRanges();
window.getSelection().addRange(range);
}
document.execCommand("copy");
}
return ( <div ref={copyTxt} > some text to copied </div> )
}
这是另一个用例，如果你想复制当前的url到你的剪贴板:
定义一个方法
const copyToClipboard = e => {
navigator.clipboard.writeText(window.location.toString())
}
调用那个方法
<button copyToClipboard={shareLink}>
Click to copy current url to clipboard
</button>
