When working with the Phoenix Framework for web development, you may come across a scenario where you need to include JavaScript on specific pages of your application. This can be achieved by following a few simple steps, ensuring your JavaScript code is executed only on the required pages.
One approach to including JavaScript on certain pages in a Phoenix Framework application is to utilize the "assigns" in your controllers. The "assigns" map allows you to pass data from the controller to the view, including the page-specific JavaScript that you want to include. Let's go through the steps to implement this.
Firstly, identify the pages where you want to include JavaScript. Once you have determined the specific pages, navigate to the corresponding controller file. In the action function corresponding to the desired page, assign a value to a key in the "assigns" map. For example, if you want to include JavaScript on the "dashboard" page, you can add the following line to the controller action:
assigns = %{javascript_include: "dashboard.js"}Next, in the corresponding EEx template file associated with the page (e.g., "dashboard.html.eex"), you can check for the presence of the JavaScript key in the "assigns" map and include the JavaScript file accordingly. Here's how you can conditionally include the JavaScript file:
<script src="">In this code snippet, we are checking if the "javascript_include" key is present in the "assigns" map. If it exists, the corresponding JavaScript file (e.g., "dashboard.js") will be included on the page using the `static_path` function.
Remember to replace "dashboard.js" with the actual name of your JavaScript file and adjust the file path accordingly. This way, you can ensure that the JavaScript is only included on the specified page without affecting others.
Additionally, you can enhance this approach by organizing your JavaScript files into a dedicated folder within the "assets" directory of your Phoenix application. By following a structured approach to managing your JavaScript files, you can maintain a clean codebase and streamline the inclusion process on specific pages.
By leveraging the flexibility of the Phoenix Framework and harnessing the power of Elixir, you can seamlessly include JavaScript on certain pages of your web application. Utilizing the "assigns" map in controllers and EEx templates allows you to maintain control over where your JavaScript code is executed, ensuring a tailored user experience for different parts of your application.
Remember, the key to success lies in understanding the interaction between controllers, views, and templates within the Phoenix Framework, enabling you to customize the behavior of your web pages with precision and efficiency.