How To Replace Html Tags In Javascript

When working with web applications, you may often encounter scenarios where you need to manipulate or replace HTML tags using JavaScript. This can be achieved using a combination of JavaScript and Regular Expressions (RegEx). In this blog post, we’ll discuss how to replace HTML tags in JavaScript using a simple and efficient method.

Replacing HTML Tags Using JavaScript and RegEx

To replace HTML tags using JavaScript, you’ll need to use the replace() method and a Regular Expression (RegEx) pattern. The replace() method is a JavaScript string method that searches for a specified pattern in a string and replaces it with a new value.

The syntax for the replace() method is as follows:

string.replace(searchValue, newValue);

Where searchValue is the pattern to search for and newValue is the value to replace the pattern with. In our case, the searchValue will be a RegEx pattern that matches any HTML tag.

Let’s take a look at a step-by-step guide on how to replace HTML tags using JavaScript and RegEx:

Step 1: Write a RegEx Pattern to Match HTML Tags

First, we need to create a RegEx pattern that will match any HTML tag. The pattern should start with an opening angle bracket < followed by any character (except the closing angle bracket >) zero or more times, and finally a closing angle bracket >.

The RegEx pattern for this looks like:


Step 2: Use the replace() Method with the RegEx Pattern

Next, we’ll use the replace() method along with the RegEx pattern to replace HTML tags in a string. Let’s say we want to remove all HTML tags from a string:

const stringWithHtmlTags = "&lt;p&gt;This is a &lt;strong&gt;sample&lt;/strong&gt; text.&lt;/p&gt;";
const regexPattern = /&lt;[^&gt;]*&gt;/g;

const stringWithoutHtmlTags = stringWithHtmlTags.replace(regexPattern, "");
console.log(stringWithoutHtmlTags); // Output: "This is a sample text."

Note the usage of the /g flag in the RegEx pattern. This flag is used for a global match, meaning that it will search for and replace all occurrences of the pattern in the string.

Step 3: Replacing HTML Tags with New Tags

If you want to replace certain HTML tags with new ones, you can use the replace() method along with a callback function. The callback function will be called for each matched tag, and its return value will be used as the replacement value. Here’s an example where we replace all <strong> tags with <em> tags:

const stringWithHtmlTags = "This is a &lt;strong&gt;sample&lt;/strong&gt; text.";
const regexPattern = /(&lt;\/?)strong&gt;/g;

const stringWithNewTags = stringWithHtmlTags.replace(regexPattern, (match, closingSlash) =&gt; {
  return closingSlash ? "&lt;/em&gt;" : "&lt;em&gt;";

console.log(stringWithNewTags); // Output: "This is a &lt;em&gt;sample&lt;/em&gt; text."

In this example, the RegEx pattern has been updated to match only <strong> tags. The replace() method takes a callback function that checks if the matched tag is an opening or closing tag and returns the appropriate <em> tag as the replacement value.


Replacing HTML tags in JavaScript is a common task in web development. By using the replace() method along with well-crafted RegEx patterns, you can efficiently manipulate and replace HTML tags with ease. Whether you’re simply removing tags or replacing them with new ones, this method provides a flexible and efficient solution for your web applications.