如题所述
<div id="content"></div>
<input type="button" id="btn" value="点击">
var content = document.getElementById("content");
var btn = document.getElementById("btn");
btn.onclick = function(){
if(content.innerText == ''){
content.style.display = 'none'
}
}
<input type="button" id="btn" value="点击">
var content = document.getElementById("content");
var btn = document.getElementById("btn");
btn.onclick = function(){
if(content.innerText == ''){
content.style.display = 'none'
}
}
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