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
这是我的代码:
import React from 'react'
class CopyToClipboard extends React.Component {
textArea: any
copyClipBoard = () => {
this.textArea.select()
document.execCommand('copy')
}
render() {
return (
<>
<input style={{display: 'none'}} value="TEXT TO COPY!!" type="text" ref={(textarea) => this.textArea = textarea} />
<div onClick={this.copyClipBoard}>
CLICK
</div>
</>
)
}
}
export default CopyToClipboard
其他回答
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>
);
}
使用材质UI完全工作的React组件
为了更好地理解，我还准备了一个CodeSandbox。希望这能有所帮助。
import { useState } from "react";
import { IconButton, Snackbar } from "@mui/material";
import ShareIcon from "@mui/icons-material/Share";
const CopyToClipboardButton = () => {
const [open, setOpen] = useState(false);
const handleClick = () => {
setOpen(true);
navigator.clipboard.writeText(window.location.toString());
};
return (
<>
<IconButton onClick={handleClick} color="primary">
<ShareIcon />
</IconButton>
<Snackbar
message="Copied to clibboard"
anchorOrigin={{ vertical: "top", horizontal: "center" }}
autoHideDuration={20000}
onClose={() => setOpen(false)}
open={open}
/>
</>
);
};
export default CopyToClipboardButton;
下面是按钮的样子:
当你点击它时:
来源:https://fwuensche.medium.com/react——按钮——复制到剪贴板- 75 ef5ecdc708
这是我的代码:
import React from 'react'
class CopyToClipboard extends React.Component {
textArea: any
copyClipBoard = () => {
this.textArea.select()
document.execCommand('copy')
}
render() {
return (
<>
<input style={{display: 'none'}} value="TEXT TO COPY!!" type="text" ref={(textarea) => this.textArea = textarea} />
<div onClick={this.copyClipBoard}>
CLICK
</div>
</>
)
}
}
export default CopyToClipboard
如果希望从DIV而不是文本字段中进行选择，下面是代码。“代码”是需要复制的值
import React from 'react'
class CopyToClipboard extends React.Component {
copyToClipboard(code) {
var textField = document.createElement('textarea')
textField.innerText = code
document.body.appendChild(textField)
textField.select()
document.execCommand('copy')
textField.remove()
}
render() {
return (
<div onClick={this.copyToClipboard.bind(this, code)}>
{code}
</div>
)
}
}
export default CopyToClipboard
导航器。剪贴板不工作在HTTP连接根据他们的文档。所以你可以检查它是否未定义，并使用document.execCommand('copy')来代替，这个解决方案应该涵盖几乎所有的浏览器
const defaultCopySuccessMessage = 'ID copied!'
const CopyItem = (props) => {
const { copySuccessMessage = defaultCopySuccessMessage, value } = props
const [showCopySuccess, setCopySuccess] = useState(false)
function fallbackToCopy(text) {
if (window.clipboardData && window.clipboardData.setData) {
// IE specific code path to prevent textarea being shown while dialog is visible.
return window.clipboardData.setData('Text', text)
} else if (document.queryCommandSupported && document.queryCommandSupported('copy')) {
const textarea = document.createElement('textarea')
textarea.innerText = text
// const parentElement=document.querySelector(".up-CopyItem-copy-button")
const parentElement = document.getElementById('copy')
if (!parentElement) {
return
}
parentElement.appendChild(textarea)
textarea.style.position = 'fixed' // Prevent scrolling to bottom of page in MS Edge.
textarea.select()
try {
setCopySuccess(true)
document.execCommand('copy') // Security exception may be thrown by some browsers.
} catch (ex) {
console.log('Copy to clipboard failed.', ex)
return false
} finally {
parentElement.removeChild(textarea)
}
}
}
const copyID = () => {
if (!navigator.clipboard) {
fallbackToCopy(value)
return
}
navigator.clipboard.writeText(value)
setCopySuccess(true)
}
return showCopySuccess ? (
<p>{copySuccessMessage}</p>
) : (
<span id="copy">
<button onClick={copyID}>Copy Item </button>
</span>
)
}
您可以在任何地方调用和重用该组件
const Sample=()=>(
<CopyItem value="item-to-copy"/>
)
