代码编辑器:
x
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<p>点击按钮修改背景颜色</p>
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<button id="myBtn">点我</button>
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<script>
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document.getElementById("myBtn").addEventListener("click", function()
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{
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this.style.backgroundColor = "red";
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});
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</script>
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<p>点击按钮修改背景颜色</p>
<button id="myBtn">点我</button>
<script>
document.getElementById("myBtn").addEventListener("click", function()
{
this.style.backgroundColor = "red";
});
</script>