How to Use Thymeleaf Variables in JavaScript?

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Thymeleaf is a server-side Java templating engine, and JavaScript is a client-side scripting language. As such, it is not possible to directly use Thymeleaf variables in JavaScript, as the two technologies operate in separate environments and do not share data by default.

However, there are several ways to pass data from Thymeleaf to JavaScript:

  1. Inline Script: You can pass data from Thymeleaf to JavaScript by adding an inline script to your HTML file, and using Thymeleaf expressions to inject the data into the script. Here’s an example:
<script>
  let myVariable = '${myThymeleafVariable}';
</script>

In this example, the Thymeleaf expression ${myThymeleafVariable} is used to inject the value of the Thymeleaf variable myThymeleafVariable into the JavaScript code.

  1. Data Attribute: You can pass data from Thymeleaf to JavaScript by adding a data attribute to an HTML element, and accessing the data from JavaScript using the dataset property. Here’s an example:
<div id="myDiv" data-variable="${myThymeleafVariable}"></div>

<script>
  let myVariable = document.getElementById('myDiv').dataset.variable;
</script>

In this example, the Thymeleaf expression ${myThymeleafVariable} is used to set the value of the data attribute data-variable on the HTML element with id myDiv. The JavaScript code then accesses the data using the dataset property of the element.

These are just two examples of how to pass data from Thymeleaf to JavaScript. The approach you choose will depend on the specific requirements of your project.

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