js 实现复制到剪贴板并且兼容浏览器

大家好，我是前端小喵

一、关键代码

// navigator.clipboard.writeText
// document.execCommand('copy')
const copyText = str => {
  if (navigator?.clipboard?.writeText) {
    navigator.clipboard.writeText(str)
  } else {
    const textarea = document.createElement('textarea')
    textarea.style.position = 'fixed'
    textarea.style.opacity = 0
    textarea.value = str
    document.body.appendChild(textarea)
    textarea.select()
    document.execCommand('copy')
    document.body.removeChild(textarea)
  }
}