vTomb Logo

JavaScript String Contains: How to check a string exists in another Video

Home
Home
In this tutorial, you’ll learn how to use the JavaScript String Contains function to determine whether a string exists in another.

Don’t forget to subscribe to the Junior Developer Central channel for more videos and tutorials!

In a bit of a spoiler, there actually is no contains function in JavaScript but if you want to use JavaScript to check if a string contains a substring.

There are a few ways you can check if a certain substring exists in a string with JavaScript but we’ll focus on a classic, pre-ES6 way, using the indexOf function which will give you the most browser compatibility.

Using the indexOf function you check where a JavaScript string contains characters that you pass as an argument. If the string exists, you get a positive value indicating the position of the substring in the base string. If the string doesn’t exist, you receive a value of -1.

By checking the returned value of indexOf you can determine whether the string contains the substring.

This traditional method will appear in a lot of legacy code but we’ll also take a quick look at the ES6 version of this technique which is using the string includes function which operates in a similar way as indexOf but returns a boolean value.

Other videos in the JavaScript Snippets series:

JavaScript How To Remove An Item From Array Tutorial: https://youtu.be/UvohHcj9I-s
Javascript String Length: How to determine the size of a string: https://youtu.be/OO0_9gq8NNI
How to find the longest word in a String with JavaScript: https://youtu.be/j9cAav7VIv4
Find the largest number in an array JavaScript Tutorial: https://youtu.be/fOFSmCjvcFY
Check if a String is a palindrome with JavaScript Tutorial: https://youtu.be/_KE_yCKBqUA
How to reverse a String in JavaScript Tutorial: https://youtu.be/k7zzWvQaEhc
JavaScript join method: How to merge arrays into one value: https://youtu.be/90MVWda5DlM
Javascript How To Convert String To Number Tutorial: https://youtu.be/K-Twvsg3K_M
JavaScript Create HTML Element: How to dynamically add tags to your pages: https://youtu.be/VsXCK_2DJzA
Link JavaScript to HTML: How to run your JavaScript code in the browser: https://youtu.be/821C5aJ3SLM
JavaScript Copy Array: How to make an exact copy of an array in JavaScript: https://youtu.be/5rybkWfeh-A
JavaScript Capitalize First Letter: How to make strings and arrays sentence case: https://youtu.be/8IEI-7fj2j4
Javascript Print To Console Tutorial: Different ways to output data to the console: https://youtu.be/pkFbigsR7jI Channel Handle @codebubb
150 chances to become an millionaire

150 chances to become an millionaire

wildsbet.com

#big wins#winners#games#casinos

About the Site 🌐

This site provides links to random videos hosted at YouTube, with the emphasis on random. 🎥

Origins of the Idea 🌱

The original idea for this site stemmed from the need to benchmark the popularity of a video against the general population of YouTube videos. 🧠

Challenges Faced 🤔

Obtaining a large sample of videos was crucial for accurate ranking, but YouTube lacks a direct method to gather random video IDs.

Even searching for random strings on YouTube doesn't yield truly random results, complicating the process further. 🔍

Creating Truly Random Links 🛠️

The YouTube API offers additional functions enabling the discovery of more random videos. Through inventive techniques and a touch of space-time manipulation, we've achieved a process yielding nearly 100% random links to YouTube videos.

About YouTube 📺

YouTube, an American video-sharing website based in San Bruno, California, offers a diverse range of user-generated and corporate media content. 🌟

Content and Users 🎵

Users can upload, view, rate, share, and comment on videos, with content spanning video clips, music videos, live streams, and more.

While most content is uploaded by individuals, media corporations like CBS and the BBC also contribute. Unregistered users can watch videos, while registered users enjoy additional privileges such as uploading unlimited videos and adding comments.

Monetization and Impact 🤑

YouTube and creators earn revenue through Google AdSense, with most videos free to view. Premium channels and subscription services like YouTube Music and YouTube Premium offer ad-free streaming.

As of February 2017, over 400 hours of content were uploaded to YouTube every minute, with the site ranking as the second-most popular globally. By May 2019, this figure exceeded 500 hours per minute. 📈

By using our services, you agree to our Privacy Policy.
Alternative random YouTube videos generator: YouTuBeRandom

vTomb © 2024

By using our services, you agree to our Privacy Policy.
OK