https://www.codeslog.com/en/tags/javascript/ Recent content in JavaScript on Codeslog https://www.codeslog.com/images/default-cover.png?v=20260114T1436 https://www.codeslog.com/images/default-cover.png?v=20260114T1436 Hugo -- 0.168.0 en-US Tue, 15 Sep 2026 11:31:00 +0900 https://www.codeslog.com/en/posts/form-ux-validation/ Tue, 15 Sep 2026 11:31:00 +0900 https://www.codeslog.com/en/posts/form-ux-validation/ Forms that flash errors on focus, or stay silent until submit, fail users. Get validation timing, aria-invalid, and aria-describedby right for accessible forms. https://www.codeslog.com/en/posts/safari-top-level-await-fix/ Thu, 03 Sep 2026 11:25:33 +0900 https://www.codeslog.com/en/posts/safari-top-level-await-fix/ Reran WebKit's top-level await repro on Safari 26.6 and iOS 26.5. Past the ReferenceError, modules declared after a TLA one wait for it — loading doubled. https://www.codeslog.com/en/posts/javascript-nullish-coalescing/ Tue, 14 Jul 2026 23:52:00 +0900 https://www.codeslog.com/en/posts/javascript-nullish-coalescing/ The decisive difference between the nullish coalescing operator (??) and || — it's why 0 and empty strings get swallowed by defaults. Falsy traps, ??= assignment, optional chaining combos, and why mixing the two throws a SyntaxError. https://www.codeslog.com/en/posts/javascript-promise-methods/ Wed, 08 Apr 2026 01:00:00 +0900 https://www.codeslog.com/en/posts/javascript-promise-methods/ One failing Promise can take down your entire dashboard. Compare Promise.all and Promise.allSettled with real-world examples, and learn when to use which. https://www.codeslog.com/en/posts/javascript-function-hoisting/ Sat, 04 Apr 2026 02:30:00 +0900 https://www.codeslog.com/en/posts/javascript-function-hoisting/ Learn the difference between function declarations and expressions, how hoisting works under the hood, and when to use arrow functions in practice. https://www.codeslog.com/en/posts/language-switcher-banner/ Fri, 23 Jan 2026 08:00:00 +0900 https://www.codeslog.com/en/posts/language-switcher-banner/ Built a banner that detects browser language via navigator.language and auto-suggests the right version of a Hugo blog, with WCAG 2.2 AA keyboard navigation and screen reader support built in. https://www.codeslog.com/en/posts/blog-comment-visibility-features/ Fri, 16 Jan 2026 18:00:00 +0900 https://www.codeslog.com/en/posts/blog-comment-visibility-features/ Adding Giscus comment counts, a recent-comments list, and an all-comments page to a Hugo static blog: the GitHub GraphQL API, token and Cloudflare Pages setup, localStorage caching, and accessibility. https://www.codeslog.com/en/posts/code-block-accessibility-improvement/ Fri, 09 Jan 2026 20:00:00 +0900 https://www.codeslog.com/en/posts/code-block-accessibility-improvement/ A record of improving code blocks on a Hugo PaperMod blog. We replaced table-based line numbers with CSS counters so screen reader users can read code without the noise of table markup — a more semantic, accessible approach.