René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"When should I use let vs const in JavaScript?","acceptedAnswer":{"@type":"Answer","text":"Use const by default for all variables. Only switch to let when you know the variable needs to be reassigned, such as loop counters or values that accumulate over time. This makes your code more predictable and prevents accidental reassignment."}},{"@type":"Question","name":"Can I use var in modern JavaScript?","acceptedAnswer":{"@type":"Answer","text":"While var still works, it's not recommended in modern JavaScript. Its function-scoping and hoisting behavior can lead to subtle bugs. Use let and const instead, which have clearer block-scoping rules."}},{"@type":"Question","name":"Why can I modify an object declared with const?","acceptedAnswer":{"@type":"Answer","text":"const only prevents reassignment of the variable itself, not mutation of the value it holds. The object reference is constant, but the object's properties can still be changed. To make an object truly immutable, use Object.freeze()."}},{"@type":"Question","name":"What is the Temporal Dead Zone in JavaScript?","acceptedAnswer":{"@type":"Answer","text":"The Temporal Dead Zone (TDZ) is the period between when a let or const variable is hoisted and when it is initialized. Accessing the variable during this time throws a ReferenceError. This prevents bugs caused by using variables before they are declared."}}]}