html运行实例（eg_js_function_scope）-搜寻教程库

代码示例：（标识：eg_js_function_scope）

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript 函数</h2>

<p>myFunction() 之外的 carName 未定义。</p>

<p id="demo1"></p>

<p id="demo2"></p>

<script>
myFunction();

function myFunction() {
    var carName = "Volvo";
    document.getElementById("demo1").innerHTML =
    typeof carName + " " + carName;
}

document.getElementById("demo2").innerHTML =
typeof carName;
</script>

</body>
</html>