Weekly Platform News: Contrast Ratio Range, replaceAll Method, Native File System API

This week's web development news highlights include Firefox's enhanced contrast checker, a streamlined string manipulation method, and a new experimental API for local file access.

Firefox Improves Accessibility with Contrast Ratio Range

Meeting WCAG Success Criterion 1.4.3 (minimum contrast ratio of 4.5 for text, unless larger than 24px) is simplified in Firefox. Its Accessibility panel's element picker now provides a range of contrast ratios for text against complex backgrounds like gradients or images.

(via Šime Vidas)

JavaScript's replaceAll Simplifies Substring Replacement

Replacing all occurrences of a substring within a string is made easier with JavaScript's new replaceAll method. This eliminates the need for complex regular expressions, previously a common source of errors.

// BEFORE
str = str.replace(/foo/g, "bar");

// AFTER
str = str.replaceAll("foo", "bar");

While not yet universally supported, Babel provides automatic polyfilling via @babel/preset-env, enabling immediate use.

(via Mathias Bynens)

Chrome Experiments with Native File System API

Chrome's experimental Native File System API empowers web apps to directly read and write local files. Users grant access to specific folders through separate permission prompts, enhancing security.

Test this feature at labs.vaadin.com using Chrome on a desktop computer.

(via Thomas Steiner)

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