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JavaScript

Practical tutorials for the work we actually do. Pick one, read it in order, and apply it.

Any category Programming15 JavaScript 2 TypeScript 2 HTML and CSS 11
Any topics APIs and Integrations 3 Automation and Scripting 1 Object-Oriented Programming 1 Packaging and Dependencies 1 Performance Optimization 6 Programming Patterns 5 Testing and Debugging 3 Type Systems 1 Web Development 2
Any level Beginner 1 Advanced 2
JavaScript Web Development Advanced Clear filters 2 results
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Find a Retained Detached DOM Node With Heap Snapshots

Trace a detached preview from its DOM node to an application Map, repair cleanup, and verify repeated open-and-close cycles with heap snapshots.

6 min read
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Find the Slow Function With Chrome's Performance Profiler

Record one slow click in Chrome's Performance panel, read the Bottom-up tab by self time, fix the function it points at, and record again to prove the fix worked.

6 min read