SVG支持是否在HTML5中引入？HTML5前浏览器支持情况咨询

Great question! Let’s clear up this common confusion: HTML5 didn’t invent SVG support—it just formalized it as part of the core HTML spec. Before HTML5 rolled out, browsers did have partial, usable SVG support (not zero at all), though it varied a lot across vendors.

Here’s a quick breakdown:

• Early adopters: Browsers like Opera started supporting SVG 1.0 as far back as 2003. Firefox 1.5 (2005) and Safari 2 (2005) followed suit, adding native support for basic SVG features.
• How it worked back then: Since SVG wasn’t part of HTML specs yet, you couldn’t just drop an <svg> tag directly into your HTML. Instead, you’d use <object> or <embed> to embed SVG files, or rely on browser-specific implementations.
• The IE exception: Internet Explorer was the holdout here. Before IE9 (released in 2011, around the same time HTML5 became mainstream), IE had no native SVG support. Users needed third-party plugins like Adobe SVG Viewer to view SVG content, which was clunky and not widely adopted.
• Support limitations: Even in supporting browsers, early SVG support wasn’t complete—some advanced features (like animations or filters) were missing or inconsistent across vendors. But basic shapes, paths, and text rendering worked reliably enough for many use cases.

To sum it up: HTML5 didn’t bring SVG to browsers—it just standardized how SVG integrates with HTML. Before that, support was patchy but definitely existed for most major browsers (minus old IE).

内容的提问来源于stack exchange，提问作者user9173787