How to use Object Methods In Javascript
This approach utilizes built-in JavaScript object methods such as Object.keys() and Array.prototype.forEach() to make the merging process in a functional style. The forEach() method iterates over the array of keys extracted from the child object, allow us for clear and readable code.
Syntax:
const keys = Object.keys(childObject);
keys.forEach(key => {
if (parentObject.hasOwnProperty(key)) {
parentObject[key] = childObject[key];
}
});
Example 2: This example showcases how to merge child object values into parent keys using Object methods.
let parentObj = {
name: "John",
details: {
age: 30,
city: "New York",
},
};
Object.keys(parentObj.details).forEach((key) => {
parentObj[key] = parentObj.details[key];
});
delete parentObj.details;
console.log(parentObj);
Output
{ name: 'John', age: 30, city: 'New York' }
How to Merge Child Object Value to Parent Key Based on Key Name in JavaScript ?
JavaScript allows us to merge values from child objects into their parent object based on a specific key name. This can be useful for organizing data or simplifying complex structures. There are several approaches available in JavaScript to merge child object values to parent key based on the key name which are as follows.
Table of Content
- Using for…in loop
- Using Object Methods
- Using ES6 Spread Operator
- Using Object.assign() Method