How to create JavaScript object with key and value pair dynamically?

Question

Actually I am new to JavaScript, How to create JavaScript object with key and value pair dynamically? I want to create JavaScript object dynamically as mentioned below :-

var Categories = {

Education: {

    name: 'Education',
    models: ['Engineering', 'Arts', 'B.com'],

},

Medical: {

    name: 'Medical',
    models: ['Radiologist', 'Surgeon', 'Neurologist'],

},

Agriculture: {

    name: 'Agriculture',
    models: [ ' Domesticated', 'Bee keep', 'Live stock ‎', 'Orchards ‎', 
'Organic farming ‎'],

   },
};

Where does the dynamic key/value come in? What have you tried? Have you looked at computed properties — Patrick Evans
– Patrick Evans, Commented Nov 21, 2016 at 7:36
I Am getting values from two tables category and sub-category and want to show like key value pair suppose I have Education category in category table and Engineering', 'Arts', 'B.com' are the sub-category under Education category. — Vinit Mehta
– Vinit Mehta, Commented Nov 21, 2016 at 7:40
Take care in spelling JavaScript to avoid collision with Java. — Basil Bourque
– Basil Bourque, Commented Sep 26, 2019 at 19:23

Dhaval Chaudhary · Accepted Answer · 2018-05-22 09:35:24Z

3

for creating json you can use two syntax :

Dot syntax:

var obj ={};
obj.someKnowValue = yourThing;

Bracket syntax :

var x = 'someDynamicString';
var obj = {};
obj[x] = yourThing;

So you can achieve it by using 2nd method where you will pass Education and all as variable to be a key.

edited May 22, 2018 at 9:35

answered Nov 21, 2016 at 7:39

Dhaval Chaudhary

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2 Comments

Vinit Mehta Over a year ago

thanks for your answer , But I need like Education: { name: 'Education', models: ['Engineering', 'Arts', 'B.com'], }, first get Education dynamically then add name and models into particular category.

Kevin Kloet Over a year ago

obj.Education.name = "Education"; obj.Education.models = ['Engineering', 'Arts', 'B.com']; replace the values with your table values.

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