Web Reference: It doesn't work in Node when using var because testContext is a local of the current module. You should reference it directly: console.log(testContext);. When you don't type var, what happens is that testContext is now a global var in the entire Node process. Declaring JavaScript Variables Creating a variable in JavaScript is called declaring a variable. You declare a JavaScript variable with the let keyword or the const keyword. Jul 29, 2025 ยท If you use a declaration instead of a statement, it would be a SyntaxError. For example, a let declaration is not a statement, so you can't use it in its bare form as the body of an if statement.
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