How to Get the Length of a JavaScript Object
When working with JavaScript objects, there may be times when you want to determine how many properties an object contains. Unlike arrays, objects don’t have a built-in length
property, so getting the count of an object’s properties requires a bit more work. Here are several methods to determine the length of a JavaScript object, including modern solutions and alternatives for older environments.
1. Using Object.keys()
The Object.keys()
method is the most straightforward and widely-used approach. It returns an array of an object’s enumerable property names, making it easy to determine the length by checking the array’s length
property.