InfoQ Homepage Web Applications Content on InfoQ
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Optimized Lazy Image Loading with Progressive JPEG and HTTP Range Requests
Christoph Erdmann recently detailed an interesting technique for image lazy loading using Progressive JPEG and HTTP range requests. Unlike other image placeholder and lazy loading techniques, using range requests do not result in downloading extra image data while still providing a small preview image similar to the original.
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Facebook Proposes New IsInputPending API for Faster Input Event Processing
Facebook recently announced its first major browser API contribution. The new isInputPending API aims to shorten the time between a user input and its processing by the browser, and to increase the user experience of highly interactive applications.
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The Cost of JavaScript 2019: Improvement Opportunities Now Mostly in Download and Execution
Addy Osmani, engineering manager at Google working on Chrome, recently presented the actualized findings of the Cost of JavaScript study. Osmani contends that, as browsers engineer improvements in JavaScript parsing and compiling time, the dominant costs of processing scripts are increasingly download and CPU execution time.
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Emotion 10: CSS-in-JS with Flexible Scoped and Global Styling, and Server-Side Rendering
Emotion 10.0, a CSS-in-JS library, is a massive, long-awaited release with new features, improvements and bug fixes. Components can now be styled with the CSS property in a larger set of contexts, with a more natural syntax allowing access to the theme properties. A new Global component enables dynamic global styling. Those changes in turn made possible zero-configuration server-side rendering.
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Babel 7.3: Smart Pipelines, Private Instance Accessors and More
The recently released Babel 7.3 can now parse and compile private instance accessors and the 'smart' pipeline operator. Babel 7.3 additionally supports named capturing groups in regular expressions, and much more.
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Hyperscript Tagged Markup: A JSX Alternative Based on Standard JavaScript
The Hyperscript Tagged Markup (HTM) library, which proposes an alternative to JSX, released its second major iteration. HTM 2.0 is a rewrite that is faster and smaller than HTM 1.x, has a syntax closer to JSX, and now supports Server-Side Rendering (SSR). With HTM 2.0, developers may enjoy simplified React/Preact workflows for modern browsers.
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Visual Studio Code Now Supports Debugging of iOS Web Apps
A new extension for Visual Studio Code aims to allow developers to debug JavaScript web apps and sites running on iOS devices directly from their editor both on Mac and Windows, writes Microsoft program manager for JavaScript Diagnostics Kenneth Auchenberg.
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Angular Mobile Toolkit Tries to Make Web Apps Feel Native
A new part of Angular 2, the Angular Mobile Toolkit, brings together tools and techniques to help developers make their web apps feel more native. In a session at ng-conf 2016, Jeff Cross and Alex Rickabaugh showed how to use three of these techniques to build a "progress web app".
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Nginx Plus R8 Brings Hardened HTTP/2 and Persistent Re-configuration API
The Release 8 of Nginx Plus has a hardened HTTP/2 implementation and a persistent re-configuration API.
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Measuring the Performance of Single Page Web Applications
Measuring the performance of single page applications (SPAs) presents some unique challenges. Philip Tellis, author of the boomerang library and Chief Architect at SOASTA, and Nicholas Jansma, senior engineer at SOASTA, deep-dived into the subject at the Velocity conference in Amsterdam, providing context and specific advice on how to measure performance for that kind of web applications.
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Django 1.7 Is the Biggest Django Release since 1.0
It took the Django Software Foundation nearly one year, but finally Django 1.7 is here. This is the biggest Django release since Django 1.0, featuring "a new app loading framework, a new check framework, many improvements to query construction, and most importantly - Migrations", a new built-in database migration system.
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Meteor 0.9 Release Brings Controversial Packaging System
Geoff Schmidt -- co-founder of Meteor -- announced this week the release of Meteor 0.9 and and the official Meteor packaging system.
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Firefox OS 1.3 Adds New Technologies For Mobile Developers
Mozilla has announced that a new Firefox OS version is now available to Mozilla partners. The update includes many new features for both users and developers. The new OS version is already available on a new ZTE mobile phone, the ZTE Open C.
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Testing PhoneGap Apps on Devices without SDK, Compilation or Code Signing
PhoneGap has released PhoneGap Developer App, a tool for testing apps during development, bypassing the whole SDK and the need for compiling or signing the code. LiveReload with GapReload can do the same thing.
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Using Sigma for Drawing Graphs
The team behind Sigma, a JavaScript library dedicated to drawing graphs in Web applications, released a new version of this tool. What this library provides is a way for developers to create graphs while making networks manipulation on webpages smooth and faster for the user.