It then returns the position of the array element or -1 if no element passes the test. Here is the JavaScript program to find an object by id using find() method in. The findIndex() method takes a function containing a test as an argument and applies it to each element of the array without making any changes to the original array. It will return undefined if the condition is not satisfied by the array element. Find Index of Object With findIndex() Method This method is a lot more elegant, but sadly it doesn’t work on old browsers. JavaScript ES6 introduced a new method called findIndex(). We could have used the map function to get the value of any property and get the index of the object based on that property. Object Literals Defining an object literal is the simplest way to create a JavaScript object. Lastly, we used the indexOf() method to get the index of the object whose age property is 45 and printed it to the console. You can make a JavaScript object in four different ways: with object literals using a constructor function with ECMAScript 6 classes with the Object.create () method Let’s see them one by one below. We then used the map function to just get the ages of employees in a separate array. The objects contain data of different employees. In the above code, we first defined an array which contains two objects.
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