Skip to content
Related Articles

Related Articles

Improve Article

How to convert 3-digit color code to 6-digit color code using JavaScript ?

  • Last Updated : 12 Mar, 2021

In this article, we are converting a three-digit color HEX code into a six-digit color HEX code using JavaScript. To solve this problem, first we copy of the individual digits and paster at consecutive position. For example – #34E will be converted into #3344EE and #E90 will be converted into #EE9900.

Steps to convert 3-digit color code to 6-digit color code:

Hey geek! The constant emerging technologies in the world of web development always keeps the excitement for this subject through the roof. But before you tackle the big projects, we suggest you start by learning the basics. Kickstart your web development journey by learning JS concepts with our JavaScript Course. Now at it's lowest price ever!

Step 1: The color code is in string format. So, apply the split method on the string. After applying the split method we got an array of elements.

Javascript




<script>
  
var digit = "39E"
  
digit = digit.split("")
  
console.log(digit)
  
// ["#", "3", "9", "E"]
</script>

Output:



["#", "3", "9", "E"]

Step 2: Now apply the map method and iterate over the array and return every item with concatenating to itself and check if the item is “#” then do not return the concatenated result, just return the item.

Javascript




<script>
  
var digit = "#39E";
  
digit = digit.split("").map((item)=>{
    if(item == "#"){return item}
        return item + item;
})
  
console.log(digit)
  
// ["#", "33", "99", "EE"]
</script>

Output:

["#", "33", "99", "EE"]

Step 3: Now use the join method to convert all the array items into a single string.

Javascript




<script>
  
var digit = "#39E"
  
digit = digit.split("").map((item)=>{
    if(item == "#"){return item}
        return item + item;
}).join("")
  
console.log(digit)
<script>

Output:

"#3399EE"

Step 4: In the above step, we are converting “#39E” but we can see the first element of this code is “#”, but if the user does not provide the “#” then you have to check if the first element is “#” then concatenate it with the resulting code. And this is our complete code.

Javascript




<script>
  
var digit = "#39E"
  
digit = digit.split("").map((item)=>{
    if(item == "#"){return item}
        return item + item;
}).join("")
  
if(digit[0] != "#"){
    digit = "#" + digit;
}
  
console.log(digit)
</script>

Output:

#3399EE



My Personal Notes arrow_drop_up
Recommended Articles
Page :