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"/>
)

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>
  );
};

最简单的答案就是

navigator.clipboard.writeText(“价值”)

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>
  );
}

最简单的方法是使用react-copy-to-clipboard npm包。

您可以使用以下命令安装它

npm install --save react react-copy-to-clipboard

请按照以下方式使用它。

const App = React.createClass({
  getInitialState() {
    return {value: '', copied: false};
  },


  onChange({target: {value}}) {
    this.setState({value, copied: false});
  },


  onCopy() {
    this.setState({copied: true});
  },


  render() {
    return (
      <div>

          <input value={this.state.value} size={10} onChange={this.onChange} />

        <CopyToClipboard text={this.state.value} onCopy={this.onCopy}>
          <button>Copy</button>
        </CopyToClipboard>

                <div>
        {this.state.copied ? <span >Copied.</span> : null}
                </div>
        <br />

        <input type="text" />

      </div>
    );
  }
});

ReactDOM.render(<App />, document.getElementById('container'));

以下链接提供了详细的解释

https://www.npmjs.com/package/react-copy-to-clipboard

这是一把移动小提琴。

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>
    </>
  )
}