版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/oYuLian/article/details/84629171
1.纯js
<body>
<!--input 不能有disable 样式不能有font-size:0, height和width也要正常 display不能为none-->
<input style="opacity" id="getRedinput" value="被复制的内容"/>
<script>
/*注意 只能由用户手动点击才能复制，js模拟点击无效*/
function copy(){
var getRedinput = document.getElementById("getRedinput");
const valueLength = getRedinput.value.length;
getRedinput.focus();
getRedinput.setSelectionRange(0, valueLength);
document.execCommand("copy");
getRedinput.blur();
}
</script>
</body>
2.第三方库clipboard
https://cdn.jsdelivr.net/clipboard.js/1.5.12/clipboard.min.js
<div id="target">
复制的内容
</div>
<button class="btn" type="button" onclick="hcopy()" data-clipboard-action="copy" data-clipboard-target="#target" id="copy_btn">复制链接</button>
function hcopy() {
var clipboard = new Clipboard('#copy_btn');
clipboard.on('success', function (e) {
e.clearSelection();
});
clipboard.on('error', function (e) {
});
}
注意：要使用button标签，并且要用户主动点击才行。3.适用于ios的
var btn = document.querySelector('body');
btn.addEventListener('click', function(){
var input = document.createElement('input');
input.setAttribute('readonly', 'readonly');
input.setAttribute('value', "复制的内容");
document.body.appendChild(input);
input.setSelectionRange(0, 9999);
if (document.execCommand('copy')) {
document.execCommand('copy');
}
document.body.removeChild(input);
})4.三端通用
var getTextHtml='<div style="opacity:0;position:relative;top:-10000px;" id="getADTXT">'+被复制的内容+'</div>';
document.body.insertAdjacentHTML("beforeend", getTextHtml);
var range = document.createRange();
var tar = document.querySelector('#getADTXT');
range.selectNodeContents(tar);
var selection = window.getSelection();
selection.removeAllRanges();
selection.addRange(range);
document.execCommand('copy');
selection.removeAllRanges();