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Is this a naming convention or function declaration

I am learning javascript and am now starting with objects and core functions. I came across this type of code and was wondering what exactly is this

var stringFunction = function(){};

stringFunction.test1 = function(){
  console.log("Test 1");
}

whether test1 is part of stringFunction or just a naming convention. thanks in advance

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3 answers


Here test1()

is the property (function type) stringFunction

var.
So you have defined a function in a function object.

You can use it by calling stringFunction.test1();

as you can call an external function:stringFunction(); 

var stringFunction = function(){console.log("Test stringFunction")};

stringFunction.test1 = function(){
    console.log("Test 1");
}

stringFunction();
stringFunction.test1();


OUTPUT:

Test stringFunction

Test 1

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function

instances are "weird" in Javascript because they are objects, but theirs typeof

are "function"

not "object"

.



However, they can add and add properties using either syntax f.x

or f["x"]

. Your code is just adding a property to the object function

(the property value is also a function, but that doesn't matter).

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in JavaScript, every function is a Function object. see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function . In the sample code example, create a property test1 on the stringFunction object. The new property is a Function Function object.

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