JavaScript Generator() Constructor
In JavaScript, there is no particular Generator() constructor but instead, we can use generator function declaration to construct a Generator object which is iterable as the Generator object is a subclass of the Iterable class. Generators are usually used to create functions that can be exited and re-entered.
Syntax:
function* gen(){
// Sample Code
}
let example = gen();
Example 1: This example creates a generator object.
Javascript
function* gen(){ let i = "a" yield i; yield i+"b"; } let example = gen();console.log(typeof(example))console.log(example.next().value);console.log(example.next().value); |
Output: When we check the type of example we get the object as output as there is no inbuilt Generator object
object a ab
Example 2: This example creates an infinite generator object.
Javascript
function* gen(){ let i = 123 while(true){ yield i++; }}let example = gen();for(let i = 0; i<5; i++) { console.log(example.next().value); } |
Output: We can iterate this generator function as much as we want as it will always remain true.
123 124 125 126 127
Supported Browsers:
- Chrome
- Edge
- Firefox
- Opera
- Safari
We have a complete list of JavaScript Generator methods, to check those please go through, the JavaScript Generator Reference article
