​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>Math.trunc()</h1>
​
<p>点击按钮可显示 8.76 的整数部分。</p>
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  document.getElementById("demo").innerHTML = Math.trunc(8.76);
}
</script>
​
</body>
</html>
​