Türker Yıldırım

javascript

  • wp_enqueue_script in the editor is a different hook

    Note2 min read

    Scripts for the editing screen do not go on admin_enqueue_scripts — there is a dedicated hook, and using the wrong one loads the editor bundle on every admin…

  • React 16 rewrote how a component fails

    Deep dive10 min read

    An error in one component used to blank the page. 16 unmounts the whole tree deliberately — and gives you the mechanism to stop it.

  • Object spread in ES2018, and Object.assign’s retirement

    Note2 min read

    Merging objects meant Object.assign({}, a, b), and forgetting the empty first argument mutated a — a bug that shows up two components away from where it was written.…

  • A 500 from fetch is a resolved promise, not a rejected one

    Note2 min read

    A promise from fetch resolves for any response the server returned, including a 500, and rejects only when the request could not be made at all. This is…

  • Declaring a type for a library that has none

    Note2 min read

    A JavaScript dependency without types is either an any, which defeats the point, or a declaration file, which takes ten minutes and only needs to describe what you…

  • The passive event listener flag, and the scroll jank it fixes

    Note2 min read

    A touchstart or wheel listener may call preventDefault, so the browser cannot start scrolling until the handler has run — which means every such listener delays scroll by…

  • splitChunks defaults are usually right

    Note1 min read

    CommonsChunkPlugin required declaring which modules were common, which meant knowing the dependency graph in advance and updating the configuration whenever it changed. chunks: ‘all’ lets it split synchronous…

  • Debounce without a library

    Snippet1 min read

  • IntersectionObserver replaces a scroll handler

    Note2 min read

    Lazy-loading images with a scroll listener means running getBoundingClientRect for every candidate on every scroll event, which forces layout and is exactly the work that makes scrolling stutter.…

  • AbortController cancels a fetch, finally

    Note2 min read

    A type-ahead search fires a request per keystroke, and the responses arrive out of order — so the results for “lap” can overwrite the results for “laptop”. Aborting…