If any element is contained in the second array, set the variable to true. App.js const arr1 = ['pizza', 'cake', 'cola']; const arr2 = ['pizza', 'beer']; let containsAny = false; for (const element of arr1) { if (arr2.includes(element)) { containsAny = true; break; } ...
This is a common task for front-end developers. There can be many ways to check if an element already exists in an array. In this tutorial, I’ll show you the way I do it. Table of contentshide 1Array.includes() 2Vuex Array.includes() Suppose you have a list AR/VR headsets and ...
Here, we have discussed how to check whether the value exists within the array or not. There are various ways to do this, but we have discussed three ways.
It is the simplest and fastest way to check whether a JS array contains an item or not. The JavaScript Array.indexOf() method checks a JS array for a given value or item, and if it finds the item in the array, it returns its index. If the JavaScript array contains no such values ...
If the Set has a length of 1, then all array elements are equal or the array only contains 1 element. index.js const arr1 = [1, 1, 1]; const arr2 = [1, 1, 2]; function allAreEqual(array) { const result = new Set(array).size === 1; return result; } console.log(allAre...
The function returns the index of the search element starting from0in the array if it could find the element. Else, it will return-1, indicating that it could not find the element. If there are more than one matches in an array, then the.indexOf()function will return the index of the...
In this lesson, we have learned how to check if an array consists of an object or not. So we have discussed two methods to check this, firstly we use the includes() method to check whether an array consists of the object as its element, and then we have used the some() method....
Alternatively, if you want tosupport old browserswithout using any polyfill, use the element'sclassNameproperty to check whether the class exists or not: // convert `class` attribute into string tokensconsttokens=button.className.split(' ')// check if the tokens array contains the `disabled` ...
Unlike Array.isArray() method which we used for checking if a variable is an array, there is no Object.isObject() method in JavaScript.The quickest and most accurate way to check if a variable is an object is by using the Object.prototype.toString() method....
Vue Js Check Array Specfic Value Exist or Not: In Vue.js, the includes() method can be used to check if a specific value exists in an array. This method returns a boolean value indicating whether the element is present in the array or not. If the val