core JS drill: - closures over loop var (classic var vs let in setTimeout) - chain promises in order, parallel w Promise.all, error handling - polyfill for Array.prototype.map - predict console output for snippets (mostly hoisting + event loop gotchas) IF you dont know the event loop / microtask vs macrotask, prep that

ServiceNow UI SWE - JS deep dive

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core JS drill: - closures over loop var (classic var vs let in setTimeout) - chain promises in order, parallel w Promise.all, error handling - polyfill for Arra...