[英]Why does this HTML/JS revert back to the original after changing the inner HTML?
I am starting to learn JavaScript and I was wondering why this doesn't permanently make "Ephemeral" appear before the button and why it reverts back to the original HTML page before the button is pressed? 我开始学习JavaScript,我想知道为什么这不会永久地使“短暂”出现在按钮之前以及为什么它会在按下按钮之前恢复到原始HTML页面?
index.html 的index.html
<!DOCTYPE html>
<html>
<head>
<title></title>
<script type="text/javascript" src="mind.js"></script>
</head>
<body>
<h1 id = "identifier"></h1>
<form>
<button value = "button!" onclick="doSomething()"> </button>
</form>
</body>
</html>
mind.js mind.js
function doSomething() {
document.getElementById("identifier").innerHTML = '<i>Ephemeral</i>';
}
Because you're submitting the form, which is refreshing the page. 因为您提交的表单正在刷新页面。 Add return false
to the inline handler, if you don't want to submit yet. 如果您还不想提交,请将return false
添加到内联处理程序。
<button value = "button!" onclick="doSomething(); return false;"> </button>
Or add return
before the call, and add return false
to the function. 或者在调用之前添加return
,并将return false
添加到函数中。
<button value = "button!" onclick="return doSomething();"> </button>
function doSomething() {
document.getElementById("identifier").innerHTML = '<i>Ephemeral</i>';
return false;
}
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