[11] Helpful Functions in Javascript that You Need to Know

Hey everyone! This article is all about the commonly used Javascript functions that we used in our daily development. A few of them may seem complex, and others may be simple, but I believe all of these functions will be more helpful in your projects.

Let’s understand more about the Javascript functions.

1. Generate Random Colors

Does your website need to generate random colors? The following line of code will do it.

2. Array Reordering

Reordering the elements of an array is a very important trick, but it is not available in native Arrays.

3. Copy To Clipboard

Copy to clipboard is a very useful and user-friendly feature.

4. Detect Dark Theme

Nowadays, the dark theme is becoming more and more popular, and many applications have a dark mode option and many users will enable the case mode on the device.

We switch the application to a dark theme to improve the user experience.

5. Scroll To Top

6. Scroll To Bottom

Like scrolling to the top, scrolling to the bottom simply sets the block to end.

7. Testing Equipment

Use navigator.userAgent to detect which platform device the website is running on. If any one of the conditions matches then the device would be mobile.

8. Hidden Element

We can set the element’s style.visibility is too hidden to hide the element’s visibility, but the element’s space will still be taken up. Setting an element’s style.display to none will remove the element from the rendering stream.

9. Get Parameters from the URL

There is a URL object in JavaScript, which can be very convenient to get the parameters in the URL.

10. Deep Copy Object

Deep copying of an object is very simple. First, convert the object to a string, and then convert it to an object.

In addition to APIs that utilize JSON, there is a newer structuredClone API for deep-copying objects, which is not supported in all browsers.

structuredClone(obj)

11. Wait Function

JavaScript provides the setTimeout function, but it does not return a Promise object, so we can’t use async on this function, but we can encapsulate the wait function.

That’s it for this article, these all are the common functions in Javascript, that might be you know already. Some of the functions will help you to use them in the projects.

I hope you enjoyed the article and if you found this useful, then please share it with your friends and colleagues.

If you have any queries please feel free to post them in the comments section or anything that you wanted to ask through mail contact.

Thank you & Happy learning

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Siddharth Rastogi

I am a full stack developer, I have an expertise in Web Development. I write tech stuff and share my knowledge with others with the help of articles.