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Capitalize the first letter of a string in JavaScript

18 January 2021

Capitalize the first letter of a string in JavaScript

The trick is to separate the string into the first letter and the rest of the string using charAt...
Insert CSS styles with JavaScript

17 January 2021

Insert CSS styles with JavaScript

Appending a style tag to the head tag of an HTML document requires some simple DOM manipulation. ...
Compute the factorial of a number with JavaScript

17 January 2021

Compute the factorial of a number with JavaScript

Calculating a factorial is very easy, but many JS implementations online make this problem unnece...
Calculate the Fibonacci sequence in JS

16 January 2021

Calculate the Fibonacci sequence in JS

Fibonacci sequence in JS should not be hard to build. In this article, we show step-by-step, how ...
Count the number of times a substring appears in a string in JavaScript

15 January 2021

Count the number of times a substring appears in a string in JavaScript

Have you ever tried to see how many times a letter or a word appears in a string? Or how many tim...
Convert an array of numbers to an array of ordinal numbers in JS

14 January 2021

Convert an array of numbers to an array of ordinal numbers in JS

To format an array of numbers as ordinal numbers, we need to properly add the suffixes -st, -nd, ...
Format a number as currency in JS

13 January 2021

Format a number as currency in JS

Formatting a number as currency in JS is easy. We can use Intl.NumberFormat(), and style it as cu...
Format a number with comma as a thousands separator in JS

12 January 2021

Format a number with comma as a thousands separator in JS

In JS, we can add a comma as thousands separator using the toLocaleString() method, or using Intl...
Generate a random sub-array from a larger array

11 January 2021

Generate a random sub-array from a larger array

To get a random, three-member sub-array from an array of items, we need to use the splice, Math.r...
Add random CSS classes to a paragraph in JavaScript

10 January 2021

Add random CSS classes to a paragraph in JavaScript

We have a web page with a script tag. That script tag holds an array of various Bootstrap 4 CSS c...

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