Web Reference: Mar 14, 2026 · This blog explores practical techniques to restrict JavaScript function scope, with a focus on preventing global variable access. We’ll cover methods for both browser and server-side (Node.js) environments, their pros/cons, and best practices for secure execution. The code from the template script tag doesn't have access to much of anything other than the global scope, so you don't have to worry much about it colliding with any of your other code. Variables declared with let and const inside a code block are "block-scoped," meaning they are only accessible within that block. This helps prevent unintended variable overwrites and promotes better code organization: Variables declared with the var keyword can NOT have block scope.
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