Creating Reusable Content Structures with HTML5 Template Tag
Jul 06, 2025 am 01:39 AM
The HTML5 tag is used to create a reusable lazy content structure. The specific steps are: 1. Define the template; 2. Obtain and clone the template content through JavaScript; 3. Insert the clone content into the page. Its features include default invisible, support for any HTML, and require JS operations. It is suitable for scenarios such as component structure, dynamic loading, and preloading resources. The scripts and styles in the template need to be specially processed and cannot be nested in specific tags.
Creating a reusable content structure using the HTML5 <template></template> tag is actually a very practical trick. It is not a show-off, but helps you save some HTML content that you don't want to render immediately but may use in the future, and take it out and use it when needed.
What is the <template></template> tag?
<template></template> is a tag introduced in HTML5, specifically used to store "lazy" content. That is to say, the browser will not render the content inside the page when it is loaded, but it can be taken out and reused by JavaScript.
Its characteristics are several:
- The content inside is invisible by default
- You can put any HTML, including
<script></script>and<style></style> - Must be accessed through JS to clone
For example, if you have a comment box structure or a dynamic pop-up window, you can first write it in <template></template> and then insert it into the page when the user clicks the button.
How to create reusable content using <template></template> ?
The basic usage process is: define the template → obtain the template content → insert the page.
Let's give a simple example:
<template id="user-card">
<div class="card">
<h3>Username</h3>
<p>This is the user's profile information</p>
</div>
</template>
<script>
const template = document.getElementById('user-card');
const clone = document.importNode(template.content, true);
document.body.appendChild(clone);
</script>What the above code does is very clear:
- Find template elements
- clone its contents (the second parameter
truemeans deep cloning) - Add the cloned content to the page
This method is clearer and easier to maintain than direct spelling strings.
What are the practical application scenarios?
Several common uses include:
- Component structure : such as cards, list items, button groups, and parts that can be reused on multiple pages
- Dynamic loading of content : For example, click the "Add New Item" button and clone a copy from the template and insert it into the DOM.
- Preload resources : You can put some hidden styles or scripts in templates and execute them as needed
Let's give an example closer to reality: if you are doing a to-do application, each time you add a new task item, you can predefined the template for a task item, and then insert a new one in JS each time.
The benefits of doing this are:
- The page structure is clearer
- Reduce the confusion caused by string stitching
- It is easier to do data binding and update
Notes and FAQs
Although <template></template> is very convenient, there are some details that need to be paid attention to:
- It cannot be nested in certain tags, such as
<table> or <code><select></select>, otherwise it may go wrong - The script in the template will not be executed automatically unless you manually insert it into the DOM and process it
- If you write
<style></style>in the template, inserting it will affect the global style. Remember to addscopedor namespace
In addition, some developers mistakenly think that <template></template> is framework-specific, such as the template syntax of Vue or React, but in fact, this tag of native HTML has existed for a long time and is not bad in compatibility (mainstream browsers support it).
In general, <template></template> is a lightweight and practical tool suitable for those who want to improve the reusability of page structure but do not want to introduce complex frameworks. If used properly, it will save a lot of trouble.
The above is the detailed content of Creating Reusable Content Structures with HTML5 Template Tag. For more information, please follow other related articles on the PHP Chinese website!
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