How is it possible to debug TypeScript in Google Chrome when the browser only understands JavaScript? I find myself debugging my TypeScript files within my Angular project, which was created using Angular CLI, through the Chrome developer tools. However, I'm unsure of how we are able to accomplish this. Can someone please explain the process to me?
Webpack is utilized by Angular CLI to transpile TypeScript code into JavaScript code, and in the process, it also generates source maps which assist Chrome in linking back the JavaScript code to its original TypeScript version for debugging purposes.
An illustration of tsconfig.json automatically created by angular CLI:
{
"compileOnSave": false,
"compilerOptions": {
"outDir": "./dist/out-tsc",
"baseUrl": "src",
"sourceMap": true, <--- this is essential
"declaration": false,
"moduleResolution": "node",
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"target": "es5",
"typeRoots": [
"node_modules/@types"
],
"lib": [
"es2016",
"dom"
]
}
}
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