• author: Coding in Public

Building a Search Functionality for Astro Sites


Adding search functionality to websites is a common requirement for many sites today. In this article, we will explore how to build a search feature for an Astro blog, a static site generator. We will implement a fuzzy search functionality that performs client-side searching using the FuseJS library. Additionally, we will ensure that the search results are shareable by updating the URL and page title dynamically. We will also discuss the different options available for implementing search in Astro, such as static site generation and server-side rendering.

Building the Search Component

To begin, we will create a search component in Astro that allows users to search for content. When a user enters a search query, the component will grab the JSON content of the blog posts and use the FuseJS library to perform the fuzzy search. The FuseJS library is lightweight and can be run on the client side without impacting performance. This allows us to retrieve live search results as the user types.

Making Search Shareable

In addition to live search results, we want to make the search results shareable. We achieve this by creating a separate route for the search functionality. When a user shares the search URL with someone else, they will receive the exact same search results. Each search result will be linked to the corresponding page, allowing users to click and view the full content.

Protecting Against Malicious Code

In order to ensure the security of our search functionality, we will use a library called DOM Purify. DOM Purify allows us to strip out any malicious code that a user might add when performing a search. This helps prevent potential security vulnerabilities.

Implementation Options in Astro

Astro provides several options for implementing search functionality. By default, Astro does not include any client-side JavaScript. However, it offers options for including frameworks like React or Svelte for more dynamic functionality. In our case, we will focus on the most basic implementation using client-side JavaScript on the pre-built HTML pages sent from the server.

Astro offers two paths for implementing search: static site generation and server-side rendering. Static site generation pre-builds all the HTML pages, resulting in fast loading times. Server-side rendering generates the HTML on the fly when a request is made. Both options can be used independently or in combination, depending on the project requirements. We will stick to the basic static site generation approach for our search implementation.

Getting Started

To begin building the search functionality, we need to set up an Astro project. We will use the astro.build website and follow the installation process. Once the project is set up, we can start adding the search component.

Lesson Structure

This article is part of an eight-part series where each lesson builds upon the previous one. The lessons cover various topics, starting from setting up the Astro project and ending with the complete implementation of the search functionality. The lessons are available on GitHub, and the code for each lesson can be downloaded for reference.


Adding search functionality to Astro sites is a valuable feature that enhances user experience and allows for efficient content discovery. By implementing a client-side fuzzy search using the FuseJS library, we can provide users with live search results as they type. Additionally, the ability to share search results ensures that users can easily collaborate and access the same information. With the options for static site generation and server-side rendering in Astro, developers have the flexibility to choose the approach that best suits their project requirements. By following the tutorial series, developers can build a performant search feature for their Astro site and unlock the full potential of their content.

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