How to determine whether it is a function in javascript

In JavaScript, you can use typeof and "===" operators to determine whether it is a function. The syntax format is "if (typeof function name === "function") {//It is a function} else { //Not a function}".

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

javascript determines whether it is a function

<script type="text/javascript">
    //判断是否为函数
    try {
        if(typeof FunName === "function") { //是函数    其中 FunName 为函数名称
            alert("is function");
        } else { //不是函数
            alert("not is function");
        }
    } catch(e) {}
</script>

Description:

typeof operator is used to detect the data type of the variable

[Recommended learning: javascript advanced tutorial]

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