Experiencing a problem with the bundle.js file in Angular Universal

My Angular build is giving me this error in the web browser: 

Uncaught SyntaxError: expected expression, got '<' in bundle.js

When I run the command npm run dev:ssr, no errors are generated.

However, when I try to access the application, the error appears. I attempted using ng serve --aot but the application is set up to only run with npm run dev:ssr. Where should I look to debug and resolve this syntax error?

Edit: Additional Information npm run build creates the bundle.js file with accurate data in dist/browser. Could this be related to a debugging feature?

javascriptangulartypescriptangular-universalangular-ssr

Answer №1

It seems like your browser is trying to find bundle.js, but your server is sending a different startup file (such as index.html) that begins with a new HTML tag (like <!DOCTYPE html>).

When the JavaScript parser parses your bundle.js file, it expects expressions (like methods or function bodies in TypeScript), but instead encounters a new HTML start tag (<). This leads to an error message: 

Uncaught SyntaxError: expected expression, got '<'
.

To resolve this issue, please check the page source (found under the Sources section) in your browser to see if bundle.js contains any HTML tags. If it does, consider adjusting your routing so that either bundle.js is loaded correctly or another startup file is used.

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