call() , apply() and bind() Method In JavaScript

What is the call() Method in js ?

call() method is a built-in javascript method that allows us to invoke a function with specified “this” context.

Key Features ?

• First parameter Sets “this” context value for the function.
• Make a function Reusable.
• Apply the same function to different objects.
• Others parameter passed with comma seperated
• It calls the function directly

What is the apply() Method in js ?

apply() method is a built-in javascript method that allows us to invoke a function with specified “this” context.

Key Features ?

• First parameter Sets “this” context value for the function.
• Make a function Reusable.
• Apply the same function to different objects.
• Other parameters are passed as an array:
• It calls the function Immediately

What is the bind() Method in js ?

The bind() method is a built-in JavaScript method that creates a copy of the original function and returns a new function with a specified this context, rather than invoking the original function immediately.

Key Features ?

• First parameter Sets “this” context value for the function.
• Make a function Reusable.
• Apply the same function to different objects.
• Others parameter passed with comma seperated
• creates a copy of the original function and returns a new function
• Need to call the returned function to access the original functionality

Key Differences between call() , apply() and bind() Methods :

Execution Timing:

• call() and apply() invoke the function immediately.
• bind() returns a new function without invoking it, allowing deferred execution.

Arguments Handling:

• call() accepts arguments as comma-separated values.
• apply() requires arguments as an array.
• bind() also uses comma-separated arguments, but these are pre-set for later when the function is invoked.

Return Value:

• call() and apply() return the result of the function call.
• bind() returns a new function with the specified this context.

Write down in the comment box your knowledge about the call(), apply(), and bind() methods.

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