


Weekly Platform News: Contrast Ratio Range, replaceAll Method, Native File System API
Apr 14, 2025 am 09:43 AMThis 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 ?ime 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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