实现邀请码的复制粘贴

一、点击input框进行复制

<input type="text" readonly="readonly" onchange="this.defaultValue=this.value" value="" class="input" id="text_input" onClick="copy($('.input').val())"/>

function copy(message) {
    var input = document.createElement("input"); 
    input.value = message;           
    document.body.appendChild(input); 
    input.select();            
    input.setSelectionRange(0, input.value.length), document.execCommand('Copy');
    document.body.removeChild(input); 
    //alert("复制成功");
}

 二、点击按钮复制文本

<div class="hema_code"><span id="content">邀请码</span></div>
<div class="heme_copy" id="copyBT">复制</div>

function copyArticle(event) {
　　const range = document.createRange();
　　range.selectNode(document.getElementById('content'));

　　const selection = window.getSelection();
　　if(selection.rangeCount > 0) selection.removeAllRanges();
　　selection.addRange(range);
　　document.execCommand('copy');
　　var content=$("#content").html();
　　if(content != "" && content != null && content != undefined){
　　　　alert("复制成功！");
　　}
}

document.getElementById('copyBT').addEventListener('click', copyArticle, false);