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

Description:

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

[Recommended learning:javascript advanced tutorial]

The above is the detailed content of How to determine whether it is a function in javascript. For more information, please follow other related articles on the PHP Chinese website!