How JavaScript deletes object properties

This article mainly introduces the relevant knowledge of "how to delete object attributes in JavaScript". The editor shows you the operation process through an actual case. The operation method is simple, fast and practical. I hope this article "how to delete object attributes in JavaScript" can help you solve the problem.

1. Set the property to undefined

Setting the property to undefined is not the best approach, because the property itself will still exist in the object. It also changes the original object, which you may not want.

Const pet = {species: 'dog', age: 3, name:' celeste', gender: 'female'}; pet.gender = undefined; Object.keys (pet); / / [' species', 'age',' name', 'gender'] 2. Use the delete operator

Technically, using the delete operator is the right way to remove properties from a JavaScript object. Unlike the previous method, delete removes properties completely from the object, but it still causes changes to the original object.

Const pet = {species: 'dog', age: 3, name:' celeste', gender: 'female'}; delete pet.gender; Object.keys (pet); / / [' species', 'age',' name'] 3. Use object deconstruction

By using the expansion operator (.) You can deconstruct an object that needs to omit specific properties to a new object. This technique is especially useful when you need to delete multiple attributes and does not change the original object.

Const pet = {species: 'dog', age: 3, name:' celeste', gender: 'female'}; const {gender,... newPet} = pet; Object.keys (pet); / / [' species', 'age',' name', 'gender] Object.keys (newPet) / / ['species',' age', 'name'] that's all for "how JavaScript deletes object properties". Thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.