[英]Changing an element's class at the click of a button and renaming the button name and vice-versa
我需要你的帮助,
当我重新单击按钮“扩展”时,如何重新最小化(将textarea的类设置为正常)
我可以使它正常工作,但是反之则不行。
这是我的HTML + Javascript
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
.normal {
width: 400px;
height: 25px;
}
.expand {
height: 400px;
width: 400px;
}
</style>
<script type="text/javascript">
function expand() {
document.getElementById('subject_area').className = "expand"
document.getElementById('expand').value = "minimize"
}
</script>
</head>
<body>
<input class="normal" id="subject_area" type="textarea" >
<input id="expand" type="button" value="expand" onclick="expand()">
</body>
</html>
你可以做:
var subject = document.getElementById('subject_area');
var btnExpand = document.getElementById('expand');
subject.className == "expand" ? subject.className = "normal" : subject.className = "expand";
btnExpand.value == "minimize" ? btnExpand.value = "expand" : btnExpand.value = "minimize";
var subject = document.getElementById('subject_area');
var button = document.getElementById('expand');
function expand() {
if (subject.className === 'normal') {
subject.className = 'expand';
button.value = 'minimize';
} else {
subject.className = 'normal';
button.value = 'expand';
}
}
在这里提琴: http : //jsfiddle.net/ToddT/aPqgh/
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