57 lines
1.3 KiB
Markdown
57 lines
1.3 KiB
Markdown
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---
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title: HTML5 Browser Support
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---
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# HTML5 Browser Support
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## Overview
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### You can teach older browsers to handle HTML5 correctly.
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## HTML5 Browser Support
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HTML5 is supported in all modern browsers.
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In addition, all browsers, old and new, automatically handle unrecognized elements as inline elements.
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Because of this, you can "teach" older browsers to handle "unknown" HTML elements.
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## Define Semantic Elements as Block Elements
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HTML5 defines eight new semantic elements. All these are block-level elements.
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To secure correct behavior in older browsers, you can set the CSS display property for these HTML elements to block:
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```html
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header, section, footer, aside, nav, main, article, figure {
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display: block;
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}
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```
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#Add New Elements to HTML
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You can also add new elements to an HTML page with a browser trick.
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This example adds a new element called <myHero> to an HTML page, and defines a style for it:
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```html
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<!DOCTYPE html>
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<html>
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<head>
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<script>document.createElement("myHero")</script>
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<style>
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myHero {
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display: block;
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background-color: #dddddd;
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padding: 50px;
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font-size: 30px;
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}
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</style>
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</head>
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<body>
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<h1>A Heading</h1>
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<myHero>My Hero Element</myHero>
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</body>
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</html>
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```
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#### More Information:
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* [W3 Schools](https://www.w3schools.com/html/html5_intro.asp)
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