How to Add Space Between camelCase Words in Javascript
In this tutorial, you will learn how to add space between camelCase words in javascript. By capitalizing the initial letter of each word and omitting spaces, camelCase is a style of punctuation used to distinguish between the words in a sentence. For a newbie developer, it can be a bit tricky to add space between camelCase words.
There are numerous ways to add space between camelCase words. We are going to use the simplest approach which involves the usage of the regex pattern as well as replace()
method. The replace()
method searches the string for a particular value or a regex pattern and it returns a new string with the replaced values.
In the following example, we have one global variable that holds a string. Upon click of a button, we will add space between camelCase words and display the result on the screen. Please have a look over the code example and the steps given below.
HTML & CSS
- We have 3 elements in the HTML file (
div
,button
, andh1
). Thediv
element is just a wrapper for the rest of the elements. - The
innerText
for thebutton
element is“Add”
and for theh1
element, it is“Result”
. - We have done some basic styling using CSS and added the link to our
style.css
stylesheet inside thehead
element. - We have also included our javascript file
script.js
with ascript
tag at the bottom.
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <link rel="stylesheet" href="style.css"> <title>Document</title> </head> <body> <div class="container"> <button>Add</button> <h1>Result</h1> </div> <script src="script.js"></script> </body> </html>
.container { text-align: center; } button { margin-top: 10px; padding: 10px 20px; }
Javascript
- We have selected the
button
element andh1
element using thedocument.querySelector()
method and stored them inbtnAdd
andoutput
variables respectively. - We have a global variable
myString
which holds a string as its value. - We are displaying
myString
in theh1
element usinginnerText
property. - We have attached a
click
event listener to thebutton
element. - In the event handler function, we are using
replace()
method with a regex a pattern. The$1
,$2
and$3
indicates the results of the corresponding matching parentheses in the regular expression pattern. The$&
is a backreference to the whole match. We are storing the final string in theresult
variable. - We are displaying the
result
in theh1
element using theinnerText
property.
let btnAdd = document.querySelector("button"); let output = document.querySelector("h1"); let myString = `fileUploadingProcess`; output.innerText = myString; btnAdd.addEventListener("click", () => { let result = myString.replace(/([a-zA-Z])([A-Z])([a-z])/g, '$1 $2$3'); output.innerText = result; });