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                <!DOCTYPE html>
<html>
<head>
<style>
.grid-container {
  display: grid;
  grid-template-columns: auto auto auto auto;
  grid-gap: 10px;
  background-color: #2196F3;
  padding: 10px;
}

.grid-container > div {
  background-color: rgba(255, 255, 255, 0.8);
  text-align: center;
  padding: 20px 0;
  font-size: 30px;
}
</style>
</head>
<body>

<h1>使用 JavaScript 修改 grid-gap</h1>

<p>点击按钮修改行与列之间的间隙：</p>
<p><button onclick="myFunction()">点我</button></p>

<div class="grid-container" id="myDIV">
  <div class="item1">1</div>
  <div class="item2">2</div>
  <div class="item3">3</div>  
  <div class="item4">4</div>
  <div class="item5">5</div>
  <div class="item6">6</div>
  <div class="item7">7</div>
</div>

<script>
function myFunction() {
  document.getElementById("myDIV").style.gridGap = "50px 100px";
}
</script>

</body>
</html>
              