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
我个人认为没有必要为此建立一个图书馆。看看http://caniuse.com/#feat=clipboard，它现在得到了相当广泛的支持，但是你仍然可以做一些事情，比如检查当前客户端是否存在该功能，如果它不存在，就隐藏复制按钮。
import React from 'react';
class CopyExample extends React.Component {
constructor(props) {
super(props);
this.state = { copySuccess: '' }
}
copyToClipboard = (e) => {
this.textArea.select();
document.execCommand('copy');
// This is just personal preference.
// I prefer to not show the whole text area selected.
e.target.focus();
this.setState({ copySuccess: 'Copied!' });
};
render() {
return (
<div>
{
/* Logical shortcut for only displaying the
button if the copy command exists */
document.queryCommandSupported('copy') &&
<div>
<button onClick={this.copyToClipboard}>Copy</button>
{this.state.copySuccess}
</div>
}
<form>
<textarea
ref={(textarea) => this.textArea = textarea}
value='Some text to copy'
/>
</form>
</div>
);
}
}
export default CopyExample;
更新:在React 16.7.0-alpha.0中使用React hook重写
import React, { useRef, useState } from 'react';
export default function CopyExample() {
const [copySuccess, setCopySuccess] = useState('');
const textAreaRef = useRef(null);
function copyToClipboard(e) {
textAreaRef.current.select();
document.execCommand('copy');
// This is just personal preference.
// I prefer to not show the whole text area selected.
e.target.focus();
setCopySuccess('Copied!');
};
return (
<div>
{
/* Logical shortcut for only displaying the
button if the copy command exists */
document.queryCommandSupported('copy') &&
<div>
<button onClick={copyToClipboard}>Copy</button>
{copySuccess}
</div>
}
<form>
<textarea
ref={textAreaRef}
value='Some text to copy'
/>
</form>
</div>
);
}
其他回答
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
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>
);
}
我采取了和上面一些非常相似的方法，但我认为它更具体一些。在这里，父组件将作为道具传递url(或任何您想要的文本)。
import * as React from 'react'
export const CopyButton = ({ url }: any) => {
const copyToClipboard = () => {
const textField = document.createElement('textarea');
textField.innerText = url;
document.body.appendChild(textField);
textField.select();
document.execCommand('copy');
textField.remove();
};
return (
<button onClick={copyToClipboard}>
Copy
</button>
);
};
你可以做到这一点，而不需要一个外部库，例如:在一个按钮
<button
onClick={() => navigator.clipboard.writeText('Copy this text to clipboard')}
>
Copy
</button>
对于ie11和更老的浏览器，你可能需要稍微改变一下代码，这里有一个例子:
<button
onClick={() => window.clipboardData.setData("Text", 'Copy this text to clipboard')}>
Copy
</button>
我个人认为没有必要为此建立一个图书馆。看看http://caniuse.com/#feat=clipboard，它现在得到了相当广泛的支持，但是你仍然可以做一些事情，比如检查当前客户端是否存在该功能，如果它不存在，就隐藏复制按钮。
import React from 'react';
class CopyExample extends React.Component {
constructor(props) {
super(props);
this.state = { copySuccess: '' }
}
copyToClipboard = (e) => {
this.textArea.select();
document.execCommand('copy');
// This is just personal preference.
// I prefer to not show the whole text area selected.
e.target.focus();
this.setState({ copySuccess: 'Copied!' });
};
render() {
return (
<div>
{
/* Logical shortcut for only displaying the
button if the copy command exists */
document.queryCommandSupported('copy') &&
<div>
<button onClick={this.copyToClipboard}>Copy</button>
{this.state.copySuccess}
</div>
}
<form>
<textarea
ref={(textarea) => this.textArea = textarea}
value='Some text to copy'
/>
</form>
</div>
);
}
}
export default CopyExample;
更新:在React 16.7.0-alpha.0中使用React hook重写
import React, { useRef, useState } from 'react';
export default function CopyExample() {
const [copySuccess, setCopySuccess] = useState('');
const textAreaRef = useRef(null);
function copyToClipboard(e) {
textAreaRef.current.select();
document.execCommand('copy');
// This is just personal preference.
// I prefer to not show the whole text area selected.
e.target.focus();
setCopySuccess('Copied!');
};
return (
<div>
{
/* Logical shortcut for only displaying the
button if the copy command exists */
document.queryCommandSupported('copy') &&
<div>
<button onClick={copyToClipboard}>Copy</button>
{copySuccess}
</div>
}
<form>
<textarea
ref={textAreaRef}
value='Some text to copy'
/>
</form>
</div>
);
}
