Why we need call and apply in javascript?
Guys can any one explain context to use Show Why to use
Eugene S 6,5227 gold badges58 silver badges89 bronze badges asked Dec 28, 2011 at 17:49
1 You use An example from Mozilla's
What answered Dec 28, 2011 at 17:52
kevinjikevinji 10.3k4 gold badges37 silver badges57 bronze badges 6 Only if you use
Unlike other languages - in JavaScript If you call a function
using the But in all other cases -
kevinji 10.3k4 gold badges37 silver badges57 bronze badges answered Dec 28, 2011 at 17:51
TigraineTigraine 22.9k10 gold badges65 silver badges108 bronze badges 2 You use You use I find the MDN references pages for .call() and .apply() helpful. answered Dec 28, 2011 at 18:11
jfriend00jfriend00 653k90 gold badges927 silver badges930 bronze badges 1 If you have experience with jQuery, you will know that most functions take use of the I personally have used In general, just keep in mind that those ways to call a function exist, and you may one day find them convenient to use for implementing your program.
kongaraju 9,03410 gold badges51 silver badges78 bronze badges answered Dec 28, 2011 at 18:08
IvoIvo 1,6733 gold badges18 silver badges28 bronze badges If you have experience with
answered Apr 2, 2017 at 12:47
sir4ju1sir4ju1 5433 silver badges12 bronze badges I can't think of any normal situation where setting the thisArg to something different is the purpose of using apply. The purpose of apply is to pass an array of value to a function that wants those values as arguments. It has been superseded in all regular everyday usage by the spread operator. e.g.
answered Feb 10, 2017 at 3:24
Daniel CoffmanDaniel Coffman 1,9673 gold badges26 silver badges34 bronze badges Why do we use apply in JavaScript?The apply method is used for allowing a function/object belonging to an object x to be called and assigned to an object y.
When and where do you use call and apply methods in JavaScript?Difference between call() and apply() method: The only difference is call() method takes the arguments separated by comma while apply() method takes the array of arguments. Example 1: This example uses call() method to call a function.
What is the use of call apply bind?The call, bind and apply methods can be used to set the this keyword independent of how a function is called. The bind method creates a copy of the function and sets the this keyword, while the call and apply methods sets the this keyword and calls the function immediately.
What is difference between call bind and apply?Summary. call : binds the this value, invokes the function, and allows you to pass a list of arguments. apply : binds the this value, invokes the function, and allows you to pass arguments as an array. bind : binds the this value, returns a new function, and allows you to pass in a list of arguments.
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