​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>JavaScript 数组</h1>
​
<p>获取数组中等于或大于 18 的每个元素。</p>
​
<p id="demo"></p>
​
<script>
const ages = [32, 33, 16, 40];
​
document.getElementById("demo").innerHTML = ages.filter(checkAdult);
​
function checkAdult(age) {
  return age >= 18;
}
</script>
​
</body>
</html>
​