Use a for...of loop to iterate over the first array. 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 (...
Learn how to check if an element exists in an array using Array.includes(). This is a common task for front-end developers. I'll show you the way I do it.
IntersectionObserverThe API enables us to check if a given element intersects the document. useIsInViewportThe hook takes a ref object pointing to the element we want to track. IntersectionObserverThe constructor takes a function which is called with an array of entries. Entries are an array of t...
}); I want to display only conversation with current user (i.e. loggedInUser) in participants array. I tried ng-repeat="conversation in conversations" ng-if="conversation.participants.indexOf(logged_in_user) > -1" but I dodn't see any. How can I check if element exists in array in...
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...
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` ...
const allEqual = arr => // Use the 'every' method to check if all elements in the array are equal to the first element. arr.every(val => val === arr[0]); // Test cases console.log(allEqual([1, 2, 3, 4, 5, 6])); // Output: false (not all elements are equal) ...
Thesome()method checks if at least one element in the array passes the predicated function passed to it. The following code segment demonstrates how it can search for a string in an array. varfruitsArray:string[]=['apple','orange','lichi','banana'];constsearch=(targetElement:string)=>(...
main.js const element = document.createElement('div'); console.log('innerHTML' in element); // true console.log('click' in element); // true console.log('nonExistent' in element); // false This checks if certain properties and methods exist on a DOM element. Note that this works in...
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