Solving the String Replace Issue for HTML Tags in Angular 13

Learn how to successfully replace strings with HTML tags in Angular 13, ensuring rich text rendering in your application.
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How to Replace Strings with HTML Tags in Angular 13

As a beginner Angular developer, you may encounter challenges when trying to display formatted text, especially when it comes to replacing strings with HTML tags. In this guide, we will break down how to handle string replacements so that they render correctly as HTML in Angular 13.

The Problem: Strings Not Rendering as HTML

You might have a situation where you want to replace a certain string in a message with an HTML tag—for example, making a number bold. An issue arises when you attempt to do so using a simple string replacement; rather than rendering the text in bold, Angular ends up displaying the HTML tags as plain text.

Example of the Issue

Consider the following code snippet which is part of a component in Angular:

[[See Video to Reveal this Text or Code Snippet]]

The Solution: Using innerHTML

To properly render the HTML tags, you need to use Angular’s property binding with the innerHTML directive. Here’s how to do it:

Step 1: Modify Your HTML Template

Instead of using standard interpolation, change your template where you display the message to include the innerHTML binding as shown below:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: How It Works

InnerHTML Binding: The [innerHTML] directive binds the HTML content to the span element. When you set the wiadomosc variable in your component, Angular will compile and insert the HTML code into the DOM correctly.

Dynamic Rendering: This allows Angular to correctly interpret the string as HTML rather than plain text, enabling the formatted output you desire.

Key Benefits of This Approach

Security: Angular handles potential security issues related to HTML rendering, making it safer than directly manipulating the DOM.

Ease of Use: You can now easily handle complex string replacements and render them as formatted HTML within your components.

Conclusion

Replacing strings with HTML tags in Angular can be tricky, but using the [innerHTML] binding solves the problem effectively. By adapting your approach from simple string replacement to using a property binding, you'll be able to render formatted messages in your application with ease.

If you have questions or need further clarification on implementing this solution, feel free to ask in the comments below!