copy append text

copy.js

    const appendCopyrightToLivenews = e => {
      const crText = `\r\n\r\n链接：${
        location.origin
      }\r\n非商业转载请注明出处。`
      e.preventDefault()
      e.clipboardData.setData('Text', window.getSelection() + crText)
    }
    document.addEventListener('copy', appendCopyrightToLivenews)