Determine if an object is empty? Js

In fact, the development process will often encounter the Judgment object and array is empty? Here are 3 ways to determine if an object is empty

1. The most common way of thinking, for...in ... Traversal property, True as "non-empty array"; otherwise "empty array"

function judgeobj (obj) {    for (var in obj) {          return  Console.log (' Non-empty object'    )    }return console.log (' empty object ')}

2. judging by the. Stringify method that comes with JSON (upload data is commonly used)

if (JSON. Stringify (c) = = ' {} ') {    console.log (' empty)}   

3. Of course it is ES6 Grammar, Object.key ();

if (Object.key (obj). length==0) {    console.log (' empty object ')}else{    Console.log (' Non-empty object ')}

The Object.keys method is a method used in JavaScript to traverse the properties of an object.

The parameter it passes in is an object that returns an array that contains all the property names of the object.

Determine if an object is empty? Js