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javascript Topics

Interview Q&A
Variables and ConstantsVariable RulesData TypesOperatorsControl FlowLoops and IterationFunctions BasicsTypes of FunctionsArraysObjectsES6 DestructuringString MethodsHoistingGlobal and Block ScopeClosuresThe 'this' KeywordPrototypal InheritanceEvent Loop (High-End Logic)ES6+ FeaturesJavaScript ClassesJS Modules (ESM)PromisesAsync/AwaitDOM ManipulationDOM SelectorsAsync TimersMath ObjectDate and TimeError HandlingPolyfillsFunction CurryingIncrement/Decrement
Mastery Points
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The 'this' Keyword in javascript

Context & Logic

The value of this depends on how a function is called: in methods it usually refers to the object, in event handlers to the element, and in arrow functions it is lexically captured from the surrounding scope.

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