代码示例:(标识:js_numeric_separator_2)
<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 数字</h1>

<p>ES2021 引入了数字分隔符 (_) 以使数字更具可读性:</p>

<p>1_000_000_000 和 1000000000 一样吗?</p>

<p id="demo"></p>

<script>
const num1 = 1_000_000_000;
const num2 = 1000000000;
document.getElementById("demo").innerHTML = (num1 === num2);
</script>

</body>
</html>
运行结果: