剪贴板将在2021年得到各大浏览器的良好支持。一种方法是首先构建剪贴板函数的副本，然后使用onClick事件处理程序调用它。

function copy(text){
  navigator.clipboard.writeText(text)
}

为了防止硬编码，让我们假设字符串被分配给一个名为someText的变量

<span onClick={() => copy(someText)}>
  {someText}
</span>

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

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

找到了最好的方法。我是说最快的方法:w3school

https://www.w3schools.com/howto/howto_js_copy_clipboard.asp

在react函数组件中。创建名为handleCopy的函数:

function handleCopy() {
  // get the input Element ID. Save the reference into copyText
  var copyText = document.getElementById("mail")
  // select() will select all data from this input field filled  
  copyText.select()
  copyText.setSelectionRange(0, 99999)
  // execCommand() works just fine except IE 8. as w3schools mention
  document.execCommand("copy")
  // alert the copied value from text input
  alert(`Email copied: ${copyText.value} `)
}

<>
              <input
                readOnly
                type="text"
                value="exemple@email.com"
                id="mail"
              />
              <button onClick={handleCopy}>Copy email</button>

</>

如果不使用React, w3schools也有一个很酷的方法来做到这一点，工具提示包括:https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_copy_clipboard2

如果使用React，一个很酷的想法是:使用Toastify提醒消息。 https://github.com/fkhadra/react-toastify这是一个很容易使用的库。 安装后，你可以更改这一行:

 alert(`Email copied: ${copyText.value} `)

比如:

toast.success(`Email Copied: ${copyText.value} `)

如果你想使用它，不要忘记安装toastify。导入ToastContainer，同时也导入css:

import { ToastContainer, toast } from "react-toastify"
import "react-toastify/dist/ReactToastify.css"

并将烤面包的容器放入里面返回。

import React from "react"

import { ToastContainer, toast } from "react-toastify"
import "react-toastify/dist/ReactToastify.css"


export default function Exemple() {
  function handleCopy() {
    var copyText = document.getElementById("mail")
    copyText.select()
    copyText.setSelectionRange(0, 99999)
    document.execCommand("copy")
    toast.success(`Hi! Now you can: ctrl+v: ${copyText.value} `)
  }

  return (
    <>
      <ToastContainer />
      <Container>
                <span>E-mail</span>
              <input
                readOnly
                type="text"
                value="myemail@exemple.com"
                id="mail"
              />
              <button onClick={handleCopy}>Copy Email</button>
      </Container>
    </>
  )
}

这对我来说很有用:

const handleCopyLink = useCallback(() => {
    const textField = document.createElement('textarea')
    textField.innerText = url
    document.body.appendChild(textField)
    if (window.navigator.platform === 'iPhone') {
      textField.setSelectionRange(0, 99999)
    } else {
      textField.select()
    }
    document.execCommand('copy')
    textField.remove()
  }, [url])

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>
        )
    }
}