Scopes and closures are important in JavaScript. But, they were confusing for me when I first started. Here's an explanation of scopes and closures to help you understand what they are.
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A scope in JavaScript defines what variables you have access to. There are two kinds of scope – global scope and local scope.
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This is true only with JavaScript in web browsers. You declare global variables in Node.js differently, but we won't go into Node.js in this article.
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In JavaScript, there are two kinds of local scope: function scope and block scope.
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The first way is to add the debugger keyword in your code. This causes JavaScript execution in browsers to pause so you can debug.
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