代码示例：（标识：jsck_isinteger_3）
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript 数字</h1>
<h2>Number.isInteger() 方法</h2>
<p>如果值是数据类型 Number 的整数，则 Number.isInteger() 返回 true：</p>
<p id="demo"></p>
<p>Internet Explorer 11（或更早版本）不支持 Number.isInteger()。</p>
<script>
let result =
"Is 0 an integer? " + Number.isInteger(0) + "<br>" +
"Is 0/0 an integer? " + Number.isInteger(0/0) + "<br>" +
"Is 0.5 an integer? " + Number.isInteger(0.5) + "<br>" +
"Is false an integer? " + Number.isInteger(false) + "<br>" +
"Is Infinity an integer? " + Number.isInteger(Infinity) + "<br>" +
"Is -Infinityo an integer? " + Number.isInteger(-Infinity) + "<br>" +
"Is NaN an integer? " + Number.isInteger(NaN);
document.getElementById("demo").innerHTML = result;
</script>
</body>
</html>
