Engineering Notes
Ideas, experiments and explanations across software engineering.
Technical notes on frontend engineering, JavaScript internals, design systems, software architecture and the wider software stack.
Topic
JavaScript Internals
4 notes
JavaScript Internals
Sept 2026Stack vs Heap in JavaScript
A practical mental model for understanding where execution state and dynamically allocated data live.
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JavaScript Internals
Sept 2026How the JavaScript Call Stack Actually Works
Understanding function calls through execution contexts, stack frames and the order in which JavaScript executes synchronous code.
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JavaScript Internals
Sept 2026What Happens Between Writing JavaScript and Running It?
Following JavaScript from source text through parsing, compilation and execution.
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JavaScript Internals
Sept 2026What Actually Runs Your JavaScript?
JavaScript is a language, not a complete execution environment. A look at the engine, runtime and host APIs that turn JavaScript source code into a running program.
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