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How to Resolve "Uncaught SyntaxError: Cannot use import statement outside a module" in JavaScript

 When working with JavaScript, particularly ECMAScript 6 (ES6) modules, you might encounter the error: javascript Uncaught SyntaxError : Cannot use import statement outside a module This error often occurs when you're trying to use the import statement in a script that isn't recognized as a module by the browser or Node.js. Here’s a detailed guide to resolve this issue, illustrated with an example involving ArcGIS JSAPI and milsymbol.js. SyntaxError: Cannot use import statement outside a module" in JavaScript You’re using ArcGIS JSAPI 4.12 and want to incorporate milsymbol.js for drawing military symbols on a map. Your initial code looks like this: html < link rel = "stylesheet" href = "https://js.arcgis.com/4.12/esri/css/main.css" > < script src = "https://js.arcgis.com/4.12/" > </ script > < script type = "module" src = "milsymbol-2.0.0/src/milsymbol.js" > </ script > < scrip...