In this tutorial, we’ll take a look at the JavaScript String Length property and how you can use this to determine the size of a string.
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It’s a very common thing to do but to use the JavaScript string length property is luckily really simple.
In the tutorial, you’ll learn how to use the .length property to find out the length of a string but we’ll also look at some common scenarios that you might want to use the length property for.
Checking for null / falsy JavaScript string lengths - This is something that is quite common, you might have an array of strings that you want to check whether or not they are empty i.e. remove any blank strings from an array. Whilst a blank string is considered falsy, you might want to check the additional length property to make your code a bit more readable (or if you have a specific case to allow null or undefined values).
Checking variables with a JavaScript string length comparison - If you have two strings that you want to compare the length of then you’ll need compare their lengths by accessing the length property of both variables.
The Javascript string length undefined Problem - If you get an undefined result when trying to get a string’s length in JavaScript then chances are you don’t actually have a string. In the tutorial i’ll talk you through how to check that you’re actually working with a string and to convert it to one if necessary.
Javascript String Length Validation on Input fields - The final example we’ll look at is how to validate an input field’s length with JavaScript by checking the length property of the string entered into the input box.
Other videos in the JavaScript Snippets series:
How to find the longest word in a String with JavaScript:
https://youtu.be/j9cAav7VIv4Find the largest number in an array JavaScript Tutorial:
https://youtu.be/fOFSmCjvcFYCheck if a String is a palindrome with JavaScript Tutorial:
https://youtu.be/_KE_yCKBqUAHow to reverse a String in JavaScript Tutorial:
https://youtu.be/k7zzWvQaEhcJavaScript join method: How to merge arrays into one value:
https://youtu.be/90MVWda5DlMJavaScript How To Remove An Item From Array Tutorial:
https://youtu.be/UvohHcj9I-sJavascript How To Convert String To Number Tutorial:
https://youtu.be/K-Twvsg3K_MJavaScript Create HTML Element: How to dynamically add tags to your pages:
https://youtu.be/VsXCK_2DJzAJavaScript String Contains: How to check a string exists in another:
https://youtu.be/uLT9iPccVZsLink JavaScript to HTML: How to run your JavaScript code in the browser:
https://youtu.be/821C5aJ3SLMJavaScript Copy Array: How to make an exact copy of an array in JavaScript:
https://youtu.be/5rybkWfeh-AJavaScript Capitalize First Letter: How to make strings and arrays sentence case:
https://youtu.be/8IEI-7fj2j4Javascript Print To Console Tutorial: Different ways to output data to the console:
https://youtu.be/pkFbigsR7jI Channel Handle @codebubb
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. 🧠
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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. 🌟
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Users can upload, view, rate, share, and comment on videos, with content spanning video clips, music videos, live streams, and more.
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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. 📈
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