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Finally the Promise.prototype.finally() is available Serg Hospodarets Blog Since the Promises were added in JavaScript, one of the biggest concerns was the absence of an ability to easily apply some code after the Promise is fulfilled (after both success and reject actions). There are many examples of such a need: showing a loader when the request to the server is in flight or even a simpler case-
Native ECMAScript modules: nomodule attribute for the migration Serg Hospodarets Blog In one of my previous articles Native ECMAScript modules: the new features and differences from Webpack modules we attempted to detect if the browser supported ES modules. We needed this to determine either, to execute a bundled (classic) file or a script which uses the native ECMAScript module features. We manag
In the previous article Native ECMAScript modules: the new features and differences from Webpack modules we understood the differences between ES modules and their implementation in bundlers/compilers like Webpack/Babel. So far we found couple gotchas and know how to use the import \ export declarations and which caveats we may have using them in JS. But JavaScript went asynchronous many years ago
In the previous article Native ECMAScript modules - the first overview I described the history of the JavaScript modules and the current situation with the native ECMAScript modules implementation: For now, we have 2 available implementations, which we tried and compared to the bundled module. The main takeaways, so far, are: To execute a script or load an external file and execute it as a module
All the major browsers shipped the native JavaScript modules support out of the box: which means, the time we can use them without module bundlers/transpilers has come. To understand better how we come to this point let’s start from the JS modules history and then take a look at the current Native ES modules features. ...
Node.js debugging with Chrome DevTools (in parallel with browser JavaScript) Serg Hospodarets Blog Recently Paul Irish described how you can debug Node.js applications with Chrome DevTools. Since that time Chrome DevTools have evolved and the step, where you had to open the separate page with a specific URL to debug the Node.js code, was removed. It means, today you can debug your browser JavaScri
In my previous article CSS custom properties (variables) In-Depth I described CSS custom properties (variables) and variations of their usages. If you started thinking to move from CSS preprocessors to plain CSS after that- next your question might be: “what about mixins”? And voilà- there is not only an editor’s draft- https://tabatkins.github.io/specs/css-apply-rule/ but even working implementat
CSS custom properties (native variables) In-Depth Serg Hospodarets Blog I thought to start from explaining the purpose of having variables in CSS but actually popularity of CSS pre/postprocessors already did that. Couple examples: color variables for branding consistent components properties (layout, positioning etc.) avoid code duplications Yes, of course, you still can search and find/replace al
Scrolling effects are increasingly popular these days. Scroll snapping is used widely for a better separation of the provided content (vertical full height pages) or, for example, to emulate galleries behavior. There are many popular plugins (fullPage.js, jQuery.panelSnap, jQuery Scrollify etc.) which provide such functionality. Can you imagine how easy would be creating such effects using CSS onl
Frequently we want to add scrolling to some part of the page or box. E.g. to highlight something or just scroll to an anchor. To provide better UX and feeling usually smooth scrolling is used. Previously to implement it we had to use plugins like “jQuery.scrollTo” or similar solutions. But dreams came true- there is a specification for native smooth scroll behavior API. Demo ...
In short, Fetch API- it's a new Promise- based standard for doing AJAX requests. Syntax for XHR was provided more then 10 years ago (XMLHttpRequest2 - about 4 years ago). Many things changed, we got HTML5, CSS3, also close to start using EcmaScript 6. From jQuery Deferred, $q and Native JavaScript Promises people became familiar and like promises in JS. It’s time for new laconic API to do AJAX-req
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