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Languages & runtimes · #javascript
Vitest projects let one root config run node and jsdom test suites together in a monorepo. A worked two-package example, filtering for fast local loops, and the memory and coverage trade-offs.
Precompiling Handlebars templates moves parsing out of the browser and shrinks your bundle to the runtime only. Here's how it works, a CLI example, and the version-skew trap to avoid.
Build a lightweight, single‑source‑of‑truth store using the Observer pattern. Learn the minimal design, data boundaries, operational checks, and how to detect failures before they affect UI components.
Learn how Jeet's distributed worker model manages JavaScript-based stream transformations, handles state partitioning, and recovers from node failures in real-time pipelines.
Learn how to use Axios request and response interceptors to inject auth tokens, log calls, and normalize errors across a JavaScript app, plus the trade‑offs to watch for.
Handlebars printing raw tags or escaped entities? Diagnose whether {{ }}, {{{ }}}, SafeString helpers, or pre-escaped data is the cause, and fix it without opening an XSS hole.
Learn how to use Backbone.js Collections to synchronize client-side state with RESTful APIs using fetch(), comparators, and the Observer pattern.
Learn how to prevent race conditions in Grunt by implementing this.async(). Compare synchronous vs. asynchronous task patterns and see a concrete implementation for I/O operations.
Stop relying on unstable CSS selectors. Learn how to use Puppeteer's network interception and waitForResponse to capture raw JSON data directly from APIs for more robust automation.
vitest
handlebars
jeet
axios
backbonejs
grunt
puppeteer