Is it possible to create new objects in runtime in Javascript?

user_19366014 0
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From my colloquial understanding of creating new objects from classes in Javascript one can do the following line of code:

const exampleVariable = new exampleClass("ExampleArguement");

I apologize for this being a novice question but is it possible to create new objects within the execution of the program? Sort of "automating" the creation of objects in my code.

Let's say I need to create 100 objects.

I could technically write 100 lines initializing variables and their respective objects but I am 100% sure there is a more efficient way of doing this.

I tried looking up a solution but I couldn't quite get the phrasing right so I would appreciate it if someone pointed me in the right direction.

Many thanks.

object oop javascript
2 Answers

You can use loops for that.

For example: 

class SomeClass{
    constructor(id){
        this.id = id;
    }
}

const objects = [];
const amountOfObjects = 100;
// create objects
for (var i = 0; i < amountOfObjects; i++){
  const object = new SomeClass(i + 1);
  objects.push(object);
}
 
// iterate over the array of objects created and log their id
for (var i = 0; i < objects.length; i++){
  console.log(objects[i].id);
}

user_74942180

You can create an object in run-time. Just with:

const myObject = {};

Or you can use the constructor if you're more used with classes:

const myObject = new Object();

Finally, answering your question, in run-time you can create 100 objects, for instance, inside of an array or another structure:

const myArray = [];
for (let index = 0; index < 100; index++) {
  const myObject = { index };
  myArray.push(myObject)
}

With this code you will have { index: 0 } inside of myArray[0]. Then, you have 100 possible variables inside the whole array.

Hope it helps.

user_61525780
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