Convert a string all caps or all small in JavaScript

This post will discuss how to convert a string all caps or all small in JavaScript.

There are several methods to convert a string all caps or all small in JavaScript. Here are some of the most common functions:

1. Using toUpperCase() and toLowerCase() function

We can use the toUpperCase() and toLowerCase() functions of the string object, which return a new string with all the characters converted to upper or lower case respectively. We can use these functions to convert a string by calling them on the string value. These methods do not change the original string. For example, we can convert a string to uppercase using toUpperCase() and lowercase using toLowerCase() like this:

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2. Using replace() function

Another way is to use the replace() function, which is a built-in function of the string object. It accepts a regular expression and a replacement string as arguments and gives us a new string that is the result of changing the matches of the regular expression with the replacement string. We can use a regular expression that matches any character in the string, such as /./g, and change it with its uppercase or lowercase version using the toUpperCase() or the toLowerCase() function. For instance, we can make a string uppercase and lowercase using replace() like this:

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That’s all about converting a string all caps or all small in JavaScript.