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{"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What does \"this\" refer to in JavaScript?","acceptedAnswer":{"@type":"Answer","text":"The value of \"this\" depends on how a function is called, not where it is defined. In a method, this refers to the object. In a regular function, this is the global object (or undefined in strict mode). Arrow functions inherit this from their enclosing scope."}},{"@type":"Question","name":"Why does \"this\" change in JavaScript?","acceptedAnswer":{"@type":"Answer","text":"Unlike other languages where this always refers to the instance, JavaScript determines this at runtime based on how the function is invoked. This is called dynamic binding and allows for flexible function reuse but can be confusing."}},{"@type":"Question","name":"What is the difference between call, apply, and bind?","acceptedAnswer":{"@type":"Answer","text":"call() invokes a function with a specified this and individual arguments. apply() is similar but takes arguments as an array. bind() returns a new function with this permanently bound without invoking it immediately."}},{"@type":"Question","name":"Why don't arrow functions have their own this?","acceptedAnswer":{"@type":"Answer","text":"Arrow functions use lexical this binding, meaning they inherit this from their surrounding scope at definition time. This makes them ideal for callbacks but unsuitable as object methods where you need this to refer to the object."}},{"@type":"Question","name":"How do you fix \"this\" in a callback function?","acceptedAnswer":{"@type":"Answer","text":"You can fix this in callbacks by: 1) Using an arrow function which inherits this, 2) Using bind() to create a bound function, 3) Storing this in a variable (const self = this), or 4) Passing this as the second argument to methods like forEach."}}]}