WebNov 17, 2024 · To check for the type of an object’s property or a variable, we use the typeof operator of an object. It lets us get the type name of an object or its properties with as a … WebOct 20, 2016 · var obj = new String(); var str = "this is string"; typeof obj; // returns object typeof str; // returns string Try it As you can see in the above example, the typeof operator returns different types for a literal string and a string object.

How to Check if a Variable is of Function Type

WebJavaScript Program to Check If a Variable is of Function Type. In this example, you will learn to write a JavaScript program that will check if a variable is of function type. To … WebSep 11, 2024 · To check the data belongs to which data type there is an inbuilt javascript method called typeof. typeof can be used for validating the data type but there is one weird behavior of typeof Array ... byju history

JavaScript typeof - W3School

WebChecking for duplicate strings in JavaScript array; Returning data from Axios API; js 'types' can only be used in a .ts file - Visual Studio Code using @ts-check; How can I execute a python script from an html button? ReactJS: Maximum update depth exceeded error; Functions are not valid as a React child. WebFeb 8, 2024 · In JavaScript, we can use the typeof operator to check the type of a variable or object. The typeof operator takes a variable and returns its type in a string format. In addition, to the typeof operator, JavaScript also provides the instanceof operator to check the type of a variable or object. The instanceof operator accepts two … WebIn the example below, an IF statement is used to check if the type of parameter passed to checkFunction () is of Function type or not. //javascript check if function-Using instanceof operator < script > // Declare a variable and initialize it // Declare a variable and initialize it with an anonymous function var exampleVar = function () { /* A ... byju hiring for fresher