The <template> tag is a container in HTML5 for storing lazy content. It is not rendered directly when the page is loaded, but can be dynamically extracted and used through JavaScript. It is suitable for scenes where the same structure needs to be created repeatedly, such as generating lists, cards, or pop-ups. 1. The UI component structure can be predefined to improve component development efficiency; 2. Reduce the amount of code used to splice HTML in JS and enhance maintainability; 3. Improve page performance, because the template does not participate in rendering at the beginning. The steps to use include: define the template structure in HTML, use JavaScript to obtain and clone its contents, and insert the DOM after modification. Notes include: only effective in modern browsers, avoid directly embedding scripts or styles, and it is recommended to add class names or IDs for complex structures for operation.
The HTML <template></template> tag is a container for storing "lazy" content. It will not be rendered directly when the page is loaded, but can be dynamically extracted and used through JavaScript at runtime. This tag is especially suitable for scenarios where the same structure needs to be created repeatedly, such as dynamically generating lists, cards, pop-ups, etc.
What is the <template></template> tag?
Simply put, <template></template> is a "template repository" hidden in HTML. You can write a HTML structure inside, but it will not be displayed on the page and will not affect the rendering performance of the page. This part of the content will only truly "come alive" when you use JavaScript to get the content inside it and insert it into the document.
For example, you can write a template like this:
<template id="user-card">
<div class="card">
<h3>Username</h3>
<p>User Description</p>
</div>
</template>This code will not be displayed on the page unless you take it out and insert it into the DOM with JS.
The actual use of the <template> tag
- Component development : You can pre-defined the structure of the UI component and then copy an insert page when needed.
- Reduce duplicate code : Avoid splicing large amounts of HTML strings in JS to improve maintainability.
- Improve performance : Since the template content will not be rendered at the beginning, there will be no additional re-arrangement or redrawing.
For example: If you want to make a user list page, and each user displays the same way, you can first write the structure of a single user in <template> , and then clone a template content and fill it in each cycle of data.
How to use the <template> tag?
It's very simple to use, the basic steps are as follows:
- Define template structure in HTML
- Get template content with JavaScript
- Clone the template content
- Modify the content and insert it into the page
The sample code is as follows:
const template = document.getElementById('user-card'); const clone = template.content.cloneNode(true); clone.querySelector('h3').textContent = 'Zhang San'; document.body.appendChild(clone);
A few points to note:
-
contentattribute is the core part of the template -
cloneNode(true)is a deep copy, retaining all child nodes - Before inserting, you can operate the cloned content like a normal DOM.
Notes on using <template></template>
- It is only valid in browsers that support HTML5 (and modern browsers support it)
- Don't put scripts or styles directly inside, unless you know exactly how to deal with it
- If the template structure is complex, remember to add class name or ID to the element to facilitate subsequent operations
Basically that's it. Although it seems simple, using <template></template> rationally in actual projects can make the front-end logic clearer and the code cleaner.
The above is the detailed content of What is the HTML template tag?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Explain the purpose of the role attribute in ARIA.
Jun 14, 2025 am 12:35 AM
ARIA's role attribute is used to define the role of web elements and improve accessibility. 1. Role attribute helps assistive technology to understand the functions of elements, such as buttons, navigation, etc. 2. Use role attributes to assign specific roles to non-semantic HTML elements. 3. The role attribute should be consistent with the element behavior and be verified by the accessibility tool test.
HTML and Design: Creating the Visual Layout of Websites
Jun 14, 2025 am 12:39 AM
How to create a website layout? 1. Use HTML tags to define the content structure, such as, ,. 2. Control styles and positions through CSS, using box model, float or Flexbox layout. 3. Optimize performance, reduce HTTP requests, use cache and optimize images, and ensure responsive design.
How can you ensure your HTML code is readable and maintainable?
Jun 10, 2025 am 12:06 AM
Improve the readability and maintainability of HTML code can be achieved through the following steps: 1. Use semantic tags, such as, etc. to make the code structure clear and improve SEO effect; 2. Keep the code formatted and use consistent indentation and spaces; 3. Add appropriate comments to explain the code intention; 4. Avoid excessive nesting and simplify the structure; 5. Use external style sheets and scripts to keep the HTML concise.
How do I stay up-to-date with the latest HTML standards and best practices?
Jun 20, 2025 am 08:33 AM
The key to keep up with HTML standards and best practices is to do it intentionally rather than follow it blindly. First, follow the summary or update logs of official sources such as WHATWG and W3C, understand new tags (such as) and attributes, and use them as references to solve difficult problems; second, subscribe to trusted web development newsletters and blogs, spend 10-15 minutes a week to browse updates, focus on actual use cases rather than just collecting articles; second, use developer tools and linters such as HTMLHint to optimize the code structure through instant feedback; finally, interact with the developer community, share experiences and learn other people's practical skills, so as to continuously improve HTML skills.
How do I use the element to represent the main content of a document?
Jun 19, 2025 pm 11:09 PM
The reason for using tags is to improve the semantic structure and accessibility of web pages, make it easier for screen readers and search engines to understand page content, and allow users to quickly jump to core content. Here are the key points: 1. Each page should contain only one element; 2. It should not include content that is repeated across pages (such as sidebars or footers); 3. It can be used in conjunction with ARIA properties to enhance accessibility. Usually located after and before, it is used to wrap unique page content, such as articles, forms or product details, and should be avoided in, or in; to improve accessibility, aria-labeledby or aria-label can be used to clearly identify parts.
How do I create a basic HTML document?
Jun 19, 2025 pm 11:01 PM
To create a basic HTML document, you first need to understand its basic structure and write code in a standard format. 1. Use the declaration document type at the beginning; 2. Use the tag to wrap the entire content; 3. Include and two main parts in it, which are used to store metadata such as titles, style sheet links, etc., and include user-visible content such as titles, paragraphs, pictures and links; 4. Save the file in .html format and open the viewing effect in the browser; 5. Then you can gradually add more elements to enrich the page content. Follow these steps to quickly build a basic web page.
How do I create checkboxes in HTML using the element?
Jun 19, 2025 pm 11:41 PM
To create an HTML checkbox, use the type attribute to set the element of the checkbox. 1. The basic structure includes id, name and label tags to ensure that clicking text can switch options; 2. Multiple related check boxes should use the same name but different values, and wrap them with fieldset to improve accessibility; 3. Hide native controls when customizing styles and use CSS to design alternative elements while maintaining the complete functions; 4. Ensure availability, pair labels, support keyboard navigation, and avoid relying on only visual prompts. The above steps can help developers correctly implement checkbox components that have both functional and aesthetics.
What is an HTML tag?
Jun 13, 2025 am 12:36 AM
HTMLtagsareessentialforstructuringwebpages.Theydefinecontentandlayoutusinganglebrackets,ofteninpairslikeand,withsomebeingself-closinglike.HTMLtagsarecrucialforcreatingstructured,accessible,andSEO-friendlywebpages.
