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13 lis 2023 · Global, Local, and Block Scope: JavaScript offers different types of scope, each serving specific purposes. Global scope provides broad accessibility, local scope offers isolation, and block scope controls visibility within specific code blocks.
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17 cze 2019 · The main difference between the local scope and block scope is that the block statements (e.g. if conditions or for loops), don't create a new scope. So the var keyword will not have an effect, because the variables are still in the same scope.
Block Scope. Before ES6 (2015), JavaScript variables had only Global Scope and Function Scope. ES6 introduced two important new JavaScript keywords: let and const. These two keywords provide Block Scope in JavaScript. Variables declared inside a { } block cannot be accessed from outside the block:
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