How to Check If an Element Exists in ReactJS

Today, We want to share with you How to Check If an Element Exists in ReactJS.In this post we will show you check if value already exists in array ReactJS, hear for React.JS check if value exists in array of objects we will give you demo and example for implement.In this post, we will learn about check if an array contains all elements in another array in ReactJS with an example.

How to Check If an Element Exists in ReactJS

There are the Following The simple About How to Check If an Element Exists in ReactJS Full Information With Example and source code.

As I will cover this Post with live Working example to develop React.JS check if array contains value, so the check if value exists in array react for this example is following below.

Check if item exists in array React

handleCheck(val) {
    return this.state.data.some(item => val.name === item.name);
}

Way 2:

var arr = ["kupendra", "jaydeep", "mayur"];

console.log(arr.indexOf("jaydeep") > -1); //true

Check if property exists using React.js

{this.props.propInQuestion ? <a href="#">link</a> : null}

Other Way

if ('parent_node' in current_node)

How to Check If an Element Exists in ReactJS
How to Check If an Element Exists in ReactJS

Angular 6 CRUD Operations Application Tutorials

Read :

Summary

You can also read about AngularJS, ASP.NET, VueJs, PHP.

I hope you get an idea about How to Check If an Element Exists in ReactJS.
I would like to have feedback on my Pakainfo.com blog.
Your valuable feedback, question, or comments about this article are always welcome.
If you enjoyed and liked this post, don’t forget to share.


Related FAQ

Here are some more FAQ related to this Article:

  1.   reactjs open link in new tab Example Tutorial
  2.   react open new tab Example with Tutorial
  3.   react open new tab with url Example Tutorial
  4.   How to Select React Js Check All Uncheck All Checkboxes
  5.   react open url in new tab ReactJS - Router
  6.   open new tab react Example with Tutorial
  7.   Simple ReactJS Datepicker Example
  8.   ReactJS State Example Tutorial
  9.   react open link in new tab programmatically
  10.   react open new tab on button click