Introduction to the get_template_attribute function in Flask 3.0
Flask is one of the favorite frameworks for building web applications in Python. One of the interesting features of this framework is the ability to use the get_template_attribute function. This function helps you easily utilize the features of a template, allowing you to write your code in a more organized and modular way.
The get_template_attribute function allows you to load a specific template and then access its internal variables. This action is particularly useful when you want to reuse a specific component across different web page templates without duplicating the component's code.
To use this function, it's enough to specify the template name and the specific component you have in mind. You can also utilize this feature in other templates or your Python codes. Overall, this technique enables you to keep your code clean and avoid writing repetitive code.
Here is a simple example of how to use get_template_attribute: I'll review how we can utilize it in the context of Flask.
Functional Example
<!-- main.html -->
<!DOCTYPE html>
<html lang="fa">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Flask Example</title>
</head>
<body>
<h1>Hello World!</h1>
<div>
{{ get_template_attribute('component.html', 'my_component', {'title': 'My Title'}) }}
</div>
</body>
</html>
<!-- component.html -->
<div>
<h2>{{ title }}</h2>
<p>This is a component.</p>
</div>In this example, we have two templates: main.html and component.html. In main.html, we use the get_template_attribute function to load and display the component found in component.html.
Code Explanation
<!-- main.html -->This line indicates that we are currently writing the main template.
<!DOCTYPE html>Defines the HTML document type.
<html lang="fa">Starts the HTML tag with Persian language specification.
<head>Begins the head section of the document.
<meta charset="UTF-8">Specifies the character encoding.
<meta name="viewport" content="width=device-width, initial-scale=1.0">Sets the viewport for responsive design.
<title>Flask Example</title>The title of the website that will display in the browser tab.
</head>Ends the head section.
<body>Starts the body section of the HTML document.
<h1>Hello World!</h1>The main heading of the web page.
{{ get_template_attribute('component.html', 'my_component', {'title': 'My Title'}) }}Invokes the component from another template using
get_template_attribute and sets a value for title.</body>Ends the body section.
</html>Ends the HTML document.
<!-- component.html -->This line indicates that we are currently writing the component template.
<div>Begins a div tag for creating a section.
<h2>{{ title }}</h2>Displays the title sent from
main.html.<p>This is a component.</p>A simple text description of the component.
</div>Ends the div tag.