JavaScript/prototype Chaining.html at master · vishal-vaish/JavaScript · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>

</body>

</html>
<script>
    let arr = ["vishal", "achal"];
    //these are defined in __proto__ of the array

    //arr.__proto__===arr.prototype
    //arr.__proto__.__proto___===object.prototype
    //arr.__proto__.__proto___.__proto___===null(means no further proto exist)


    //every object in JS has a property called __proto
    let obj = {
            name:"vishal",
            city:"sitapur"
    }
    let obj1={
        name:"vaish"
    }

    obj1.__proto__=obj;
    obj1.city="lucknow"
    obj1.city="kanpur"

    //1. It sees in the object the property is presrnt
    //2. If not, then check the __proto__ of the object
    //3. If not even in __proto__ then check __proto__.__proto__ till the null is found
    //4. the last obj it will found will be shown

</script>