Sometimes, we want to remove certain properties from object in JavaScript.

In this article, we’ll look at how to remove certain properties from object in JavaScript.

How to remove certain properties from object in JavaScript?

To remove certain elements from map in JavaScript, we can use some object methods and the array filter method.

For instance, we write:

const obj = {}
obj.XKey1 = "Value1";
obj.XKey2 = "Value2";
obj.YKey3 = "Value3";
obj.YKey4 = "Value4";

const entries = Object.entries(obj).filter(([key]) => key.includes('XKey'))
const newObj = Object.fromEntries(entries)
console.log(newObj)

to call Objec.entries to return an array of key-value pair arrays.

Then we call filter to check if the key string has 'XKey' in it.

Next, we call Object.fromEntries with entries to create an object from the key-value pair array returned by filter.

Therefore, newObj is

{
  XKey1: "Value1",
  XKey2: "Value2"
}

Conclusion

To remove certain elements from map in JavaScript, we can use some object methods and the array filter method.