When creating a Monaca app, communication with the server is essential. During this process, a technique known as Ajax is commonly used to send requests to the server and update the screen based on the received response.
In this article, we will introduce how to use htmx with simple code examples.
htmx enables direct access to AJAX, CSS transitions, WebSockets, and server-sent events within HTML using attributes on HTML tags.
There are several ways to install htmx. The first and easiest one is to use a CDN.
Let’s consider the scenario of writing Ajax code using htmx. Typically, it would be written as follows. We will simplify it for this example, but in reality, it can become more complex with request payload creation and authentication.
The following code utilizes the service “JSONPlaceholder” as a demo server.
JSONPlaceholder is a free online REST API that provides dummy JSON data. It allows you to perform operations such as GET, POST, PUT, PATCH, and DELETE, making it useful for testing and prototyping purposes.
<a href="#" hx-get="https://jsonplaceholder.typicode.com/todos/1" hx-trigger="click" hx-target="#result">
Click here to load content
Htmx has the following features.
This is an example of server communication. htmx supports the HTTP GET/POST/PUT/PATCH/DELETE methods.
In the following example, when you click on the div tag, it sends a PUT request to /messages and updates the content of the div tag with the received response.
Put To Messages
By utilizing htmx, it is possible to update only the content within the `<body>` tag without reloading the entire HTML page. This functionality is similar to Hotwire, which is used in conjunction with Ruby on Rails. With this feature, traditional websites can evolve to have interactivity similar to that of a Single-Page Application (SPA).
To efficiently perform this process, it is recommended to specify `hx-push-url=”true”`. This enables the use of the History API, allowing dynamic rewriting of the URL and enabling features such as dynamically changing the URL and utilizing the browser’s back button.
By including `hx-push-url=”true”`, htmx makes it possible to leverage the History API, which provides seamless URL updates based on the changes made to the content. This allows for a more efficient and user-friendly browsing experience, including the ability to navigate using the browser’s back button.
This code sends a POST request to “/mouse_entered” when the mouse enters a specific element (on the occurrence of the mouseenter event). This allows the web page to dynamically respond to user actions and provides a better user experience.
<input _="on htmx:validation:validate
if my.value != "foo"
call me.setCustomValidity("Please enter the value foo")
In htmx, you can specify how to rewrite the content, and by default, the innerHTML method is used. Rewriting methods can be specified using the hx-swap attribute. Here are some options:
This extension can now be used in <div hx-ext=”my-ext” />.
Up to this point, you should be familiar with the basic concepts and usage of htmx. Now let’s see how it can be used in practical scenarios. It can be effective in the cases when most of the data resides on the server and there is no need to manage state on the client side.
1. Utilizing Simple Ajax
htmx is not necessarily suitable for complex Ajax processing. Instead, it is ideal for simple tasks such as sending information from a form and presenting the results in the user interface (UI). It is well-suited for applications where the server-side handles the request and response processing, and the client-side only displays the results.
2. Converting Existing Websites to Single-Page Applications (SPAs)
3. Implementing Chat Functionality
Since htmx supports WebSocket, it can be used to implement simple chat applications. This is especially suitable for applications where chatting is not the main functionality but they include chat features.
From the examples above, it is evident that htmx can be a valuable tool in various scenarios of web development by harnessing its unique characteristics. Understanding the efficient usage of htmx and applying it to your own projects will be beneficial.
We encourage you to master htmx and create exceptional UI/UX designs.