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How to concatenate two JavaScript objects with plain JavaScript ?
Suppose we have two objects defined like this −
const obj1 = {
id1: 21,
name1: "Kailash"
};
const obj2 = {
id2: 20,
name2: "Shankar"
};We are required to write a JavaScript function that takes in two such objects and merges into a single object.
In other words, we are required to more or less implement the functionality of Object.assign() function.
Example
The code for this will be −
const obj1 = {
id1: 21,
name1: "Kailash"
};
const obj2 = {
id2: 20,
name2: "Shankar"
};
const concatObjects = (...sources) => {
const target = {};
sources.forEach(el => {
Object.keys(el).forEach(key => {
target[key] = el[key];
});
});
return target;
}
console.log(concatObjects(obj1, obj2));Output
And the output in the console will be −
{ id1: 21, name1: 'Kailash', id2: 20, name2: 'Shankar' }
Updated on: 21-Nov-2020
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