Explain the difference between the "call", "apply", and "bind" methods in JavaScript.
Explain the difference between "call", "apply", and "bind" methods in JavaScript.
Ask by Revati S Misra
Updated 16 May 2023
The call(), apply(), and bind() methods in JavaScript are used to change the value of the this keyword within a function. The this keyword refers to the object that the function is called on. By changing the value of this, you can make the function behave as if it were called on a different object.
The call() method takes two arguments: the first argument is the value of this, and the second argument is an array of arguments to be passed to the function. For example, the following code calls the myFunction() function with the window object as this and the value 1 as the only argument:
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The apply() method is similar to the call() method, but it takes an array of arguments instead of a single argument. For example, the following code calls the myFunction() function with the window object as this and the values 1 and 2 as the two arguments:
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The bind() method creates a new function that has the specified value of this. The new function can then be called like any other function. For example, the following code creates a new function that has the window object as this and then calls the new function:
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The main difference between the call(), apply(), and bind() methods is how they take arguments. The call() method takes the value of this and an array of arguments, the apply() method takes an array of arguments and the value of this, and the bind() method takes the value of this and returns a new function.
Here is a table summarizing the differences between the call(), apply(), and bind() methods: