When Should You Use Custom HTML Tags?

Custom HTML Tags: Semantic Correctness and Innovative Usage

In HTML development, the use of custom tags raises questions about its semantic correctness. Is it appropriate to utilize identifiers like for specific elements instead of established tags like

?

According to the provided response, the semantic correctness of custom tags varies depending on the context. In the rapidly evolving landscape of HTML5, defining "valid HTML" is a fleeting goal. Browser implementations and innovations differ, leading to a wide spectrum of acceptable practices.

For widely accessible public pages, adhering to established standards is crucial to ensure compatibility with all browser and crawler configurations. HTML should be kept simple and straightforward in such cases.

However, for more restricted or cutting-edge applications, innovation and customization may be considered. If frequent updates are anticipated, choosing a custom tag carefully can enhance functionality. In such scenarios, developers have the freedom to accommodate their specific needs.

While custom tags are permissible, certain considerations must be made. To ensure proper CSS functionality in Internet Explorer, developers can utilize techniques such as document.createElement('toys') in their JavaScript code, as exemplified by html5shim.

Additionally, it's recommended to adopt the convention of including a hyphen in the name of custom tags, such as x-toys or my-toys. This aligns with emerging standards and community best practices.

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