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JavaScript Exercises

JavaScript: Retrieve all the names of object's own and inherited properties

JavaScript Object: Exercise-13 with Solution

Write a JavaScript function to retrieve all the names of object's own and inherited properties.

Sample Solution: -

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to retrieve all the names of object's own and inherited properties.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function allKeys(obj) {
    if (!isObject(obj)) return [];
    var keys = [];
    for (var key in obj) keys.push(key);
    return keys;
}
function isObject(obj) 
{
    var type = typeof obj;
    return type === 'function' || type === 'object' && !!obj;
  }
function Student(name) {
  this.name = name;
}
Student.prototype.rollno = true;
console.log(allKeys(new Student("Sara")));

Sample Output:

["name","rollno"]

Flowchart:

Flowchart: JavaScript:- Retrieve all the names of object's own and inherited properties

Live Demo:

See the Pen javascript-object-exercise-13 by w3resource (@w3resource) on CodePen.


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