It does not allow redeclaration in the same scope. It stays in a temporal dead zone until you declare it. - const: Use this by default for values that do not change. Best practice: Use const first.
We're going to use the create-react-app because it sets some useful tools and canonical defaults for React projects. This is just a command-line utility to scaffold out new React projects.
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The Closure Compiler is a tool for making JavaScript download and run faster. It is a true compiler for JavaScript. Instead of compiling from a source language to machine code, it compiles from ...