代码
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<style>
.show {
display: block;
}
.hidden {
display: none;
}
</style>
<p class="tip show">我要早睡早起,不能再熬夜了。</p>
<button class="toggle">切换</button>
<script>
var toggleBtn = document.querySelector('.toggle');
var tipEle = document.querySelector('.tip');
toggleBtn.addEventListener('click', function() {
var className = tipEle.className;
if (className.indexOf('show') > -1) {
tipEle.className = 'tip hidden';
return;
}
tipEle.className = 'tip show';
});
</script>
运行结果