html5复制命令

const copy = text=> {
    const textArea = document.createElement("textarea")
    textArea.style.position = 'fixed'
    textArea.style.top = 0
    textArea.style.left = 0
    textArea.style.width = '2em'
    textArea.style.height = '2em'
    textArea.style.padding = 0
    textArea.style.border = 'none'
    textArea.style.outline = 'none'
    textArea.style.boxShadow = 'none'
    textArea.style.background = 'transparent'
    textArea.value = text
    document.body.appendChild(textArea)
    textArea.select()

    try {
      var msg = document.execCommand('copy') ? '成功' : '失败'
      console.log('复制内容 ' + msg)
    } catch (err) {
      console.log('不能使用这种方法复制内容')
    }

    document.body.removeChild(textArea)
}