Built-in Function Constructors in javascript

Something Like that:
Built-in Function Constructors

For that you need to create first html code.

HTML

<p id="demo"></p>

After that add this JS code.

JS

var a = new Number(3);
a.toFixed(2);

String.prototype.isLengthGreaterThan = function(limit){
    return this.length > limit;
}

document.getElementById('demo').innerHTML = "John".isLengthGreaterThan(3);

Number.prototype.isPositive = function(){
    return this > 0;
}
var a = new Number(3);
a.isPositive();

[codepen_embed height=”265″ theme_id=”0″ slug_hash=”PKabje” default_tab=”result” user=”pradeepanvi”]See the Pen Built-in Function Constructors in javascript by Pradeep Kumar (@pradeepanvi) on CodePen.[/codepen_embed]

Now you can see

true

Now we will check with double equal sign.
For that you need to create first html code.

HTML

<p id="demo"></p>

After that add this JS code.

JS

var a = 3;
var b = new Number(3);
document.getElementById('demo').innerHTML = (a==b);

[codepen_embed height=”265″ theme_id=”0″ slug_hash=”Vzdmgy” default_tab=”result” user=”pradeepanvi”]See the Pen Built-in Function Constructors in javascript 02 by Pradeep Kumar (@pradeepanvi) on CodePen.[/codepen_embed]

Now you can see

true

Now with triple equal

JS

var a = 3;
var b = new Number(3);
document.getElementById('demo').innerHTML = (a===b);

[codepen_embed height=”265″ theme_id=”0″ slug_hash=”OjEbqr” default_tab=”result” user=”pradeepanvi”]See the Pen Built-in Function Constructors in javascript 03 by Pradeep Kumar (@pradeepanvi) on CodePen.[/codepen_embed]

Now you can see

false

Strange? For that please check double equal and triple equal page.