The -webkit-text-stroke property is supported in all major modern browsers: Chrome (4+), Safari (3+), Edge (12+), Opera (15+), and Firefox (49+). While it still uses the -webkit- vendor prefix, it has become a de facto standard. For maximum compatibility with older browsers, consider providing a text-shadow fallback that simulates a similar outline effect.

You can simulate a text outline using multiple text-shadow declarations. By placing shadows in 4 or 8 directions around the text (e.g., text-shadow: -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000, 1px 1px 0 #000;), you create a solid outline effect. This method has broader legacy browser support but produces slightly less smooth results on curved glyphs compared to native text-stroke.

Text-stroke produces a smooth, uniform outline that follows character contours precisely, including curves and corners. Text-shadow simulates outlines by offsetting multiple shadow copies around the text, which can look slightly angular on rounded glyphs. Text-stroke is preferred for clean, professional outline effects, while text-shadow is better for glows, drop shadows, and as a compatibility fallback for older browsers.

Unfortunately, -webkit-text-stroke only accepts a solid color value — gradients are not supported directly. However, you can achieve gradient-like outline effects by combining text-stroke with multiple colored text-shadow layers, or by using SVG text elements with gradient stroke definitions. For the fill, you can use background-clip: text with a gradient background to create gradient-filled text with a solid stroke.

The paint-order CSS property controls the order in which fill and stroke are painted. By default, fill is painted first, then stroke — meaning the stroke covers the outer half of the glyph edge. Setting paint-order: stroke fill reverses this, painting the stroke behind the fill. This preserves the original glyph shape and is especially useful when using thick strokes (3px or more), preventing the stroke from encroaching on the text interior and keeping it legible.

Text outlines are widely used in: hero headers on websites for dramatic impact, video thumbnails to make titles pop, logo and branding designs, social media graphics, game UI for readable text over varying backgrounds, and poster or editorial design-inspired web layouts. The combination of text-stroke with glow effects is particularly popular for neon-style and retro-wave aesthetics.

Yes, CSS text-stroke is generally performant for animations. Browsers handle text-stroke rendering efficiently as part of the text painting pipeline. However, animating text-stroke properties (especially stroke-width) can trigger repaints. For optimal performance, limit simultaneous animated properties and consider using will-change sparingly on animated text elements. For heavy animation use cases, combining text-stroke with text-shadow animations may offer smoother results across devices.

For responsive text-stroke, use relative units like em or rem for stroke-width so it scales proportionally with font-size changes. You can also use CSS clamp() to set bounds: e.g., -webkit-text-stroke: clamp(1px, 0.15em, 4px) #333;. Media queries allow you to adjust stroke thickness for mobile vs desktop, ensuring the outline remains visible without overwhelming smaller text on narrow screens.