2019-01-11 使用execCommand复制到剪贴板

function copyTextToClipboard(text) {
    var 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('浏览器不支持这种复制方式')
    }
    document.body.removeChild(textArea)
}