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Technology

replaceAll(): one substitution for all exact matches

replaceAll() returns new text with all matches found replaced according to the specified rule.

Published22 Oct 2026

Technology

requestAnimationFrame(): movement by time between frames

requestAnimationFrame() plans a function before a next repaint. Smooth motion should account for time, not just the number of calls.

Published22 Oct 2026

Technology

resize: vertical retains the width of the textarea

The reader can increase the height without stretching the shape to the side.

Published22 Oct 2026

Technology

ResizeObserver: the size of a component, not just the window

ResizeObserver tracks changes in the size of an item. It is useful when the container changes regardless of the window.

Published22 Oct 2026

Technology

Responsive images: choosing a source with srcset and picture

HTML can offer different sizes and compositions of an image. This helps the site to match the display to the screen without relying only on visual shrinkage.

Published22 Oct 2026

Technology

Rev-parse: resolving a revision name to an identifier

git rev-parse resolves and checks Git names. The common example git rev-parse HEAD returns the current commit identifier.

Published22 Oct 2026

Technology

Right: the physical right edge stays right

right positions an element relative to the physical right edge according to its positioning mode. On an absolutely positioned button, right: 1rem sets an offset within its containing bl...

Published23 Oct 2026

Technology