JavaScript Secrets

In this post I will share with you JavaScript tips you won’t find in most tutorials. Enjoy!

What is JavaScript?

JavaScript is a scripting language that enables you to create dynamically updating content, control multimedia, animate images, and so much more.

Let's jump to the tips!

* Shorten an array

You can set the length property to shorten an array.

Shorten an array

* Short-circuits conditionals

If you have to execute a function only if condition is true, you can use short-circuit.

Short circuit conditionals

* Show specific console.table() columns

By default, console.table() lists all elements in each row. You can use the optional “columns” parameter to select a subset of columns to display:

Show specific console.table() columns

* Remove duplicate elements from an array:

Remove duplicate elements from an array

* Convert a string to number:

Convert a string to number

* Convert a number to string:

Convert a number to string

* Numeric separators

To improve readability for numbers, you can use underscores as separators:


You can find more HTML/CSS/JS Tips here:

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This article is a repost from my blog. Find the original post here: JavaScript Tips.

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Twitter: @denicmarko

Comments (1)

Marko Denic's photo

Do you know any other JavaScript tips? Share them with me, I'll be happy to add them.