Learned about 5 types of Scopes: Global, function, block, module and …

…lexical

03 - Chai aur Javascript/16 - Lexical Scoping and Closures/01_scopes.js

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+// 1. Global Scope
+
+let globalVar = 'I am Global'
+
+function checkGlobalScope(){
+    console.log(globalVar); // Accessible here
+}
+
+checkGlobalScope()
+console.log(globalVar); // Accessible here too
+
+
+// 2. Function Scope
+
+function checkFunctionScope(){
+    let functionVar = "I am Function Variable";
+    console.log(functionVar); // Accessible here
+}
+
+checkFunctionScope();
+// console.log(functionVar) // Error: functionVar is not defined
+
+
+// 3. Block Scope
+
+if(true){
+    let blockVar = 'I am Blocked Variable'
+    console.log(blockVar); // Accesible here
+}
+
+// console.log(blockVar); // Error: blockVar is not defined
+
+// 4. Module Scope
+// const myModule = require('./myModule.js') 
+// console.log(myModule); // Works because it's imported
+
+// Lexical Scope
+
+function outer(){
+    const outerVar = "I am Outer"
+
+    function inner(){
+        console.log(outerVar); // Accesible here due to lexical scoping
+    }
+    inner()
+}
+
+outer()

03 - Chai aur Javascript/16 - Lexical Scoping and Closures/myModule.js

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+const moduleVar = "I am Module-Scoped"
+
+export default moduleVar;