标签 javascript html
<分区>
我想在按下按钮时更改 DIV 的可见性。这段代码有什么问题
<p id="myP">This is a p element.</p>
<button type="button" onclick="myFunction()">Hide content of p</button>
<script>
function myFunction() {
var which= document.getElementById("myP");
if (which.style.visibility=="visible")
which.style.visibility = "hidden"
else
which.style.visibility = "visible"
}
</script>
</body>
最佳答案
原始 HTML 没有 style="visibility: visible"。所以 which.style.visibility 返回 null。因此，if(which.style.visibility) 失败。
添加显式样式，它应该可以工作。
function myFunction() {
var which = document.getElementById("myP");
if (which.style.visibility == "visible")
which.style.visibility = "hidden"
else
which.style.visibility = "visible"
}<p id="myP" style="visibility: visible;">This is a p element.</p>
<button type="button" onclick="myFunction()">Hide content of p</button>关于javascript - 如何更改 Div 的可见性，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36849943/