Uncaught SyntaxError: Unexpected token ';'

Technical Q&A
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AI-generated summary

A Shopify store owner is troubleshooting multiple console errors and warnings in Chrome Developer Tools but cannot identify their sources.

Primary Issues:

  • Uncaught SyntaxError with semicolon: Error appears but the exact location in theme files remains unidentified despite manual checking
  • react-extension.js warnings: Console logs show initialization messages and request completions, but the file cannot be located in the theme directory
  • Iframe sandbox warning: Alert about allow-scripts and allow-same-origin attributes
  • Third-party cookies warning: Browser-level notification about Chrome’s evolving cookie policies

Troubleshooting Attempts:

  • Manually searched theme files for syntax errors
  • Attempted to locate react-extension.js without success
  • Disabled apps to isolate third-party script issues, but problems persist

Seeking Guidance On:

  • Methods to pinpoint the syntax error location
  • Identifying what react-extension.js is and how to resolve its warnings
  • Whether iframe and Early Hints warnings require action
  • If third-party cookie warnings need store-level fixes

The discussion remains open with no responses yet.

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Hi Shopify Community,

I’m encountering some errors and warnings in the Chrome Developer Tools console while working on my Shopify store. I’m not sure how to resolve them, and I’d appreciate any guidance or suggestions. Here’s what I’m seeing:

1. Uncaught SyntaxError: Unexpected token ‘;’- This error is showing up, but I’m unable to locate the exact line in my theme files. The error seems to be related to a ; in the code, but I’ve checked my files and can’t find any issues.

2. Warnings in react-extension.js- The following messages are logged in the console:

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react-extension.js:28 ===cow init
react-extension.js:28 ===cow real init
react-extension.js:28 ===cow Search form. Services count: 0
react-extension.js:28 ===cow Search form. Services count: 1
react-extension.js:28 window.onload()
react-extension.js:28 halo.init()
react-extension.js:28 initMultiTab()
react-extension.js:28 ===cow request completed! https://error-analytics-sessions-production.shopifysvc.com
react-extension.js:28 ===cow request completed! /collections/sahkopyorat?view=ajax_product_block&constraint=limit%3D8%2Blayout%3Dgrid%2BsectionId%3Dtemplate--24661361885526__3da08ce8-c286-4302-872b-ffde3efcd911%2BimageRatio%3Dportrait%2Bswipe%3Dtrue%2BhasCountdown%3Dundefined&_=1740899398865
  • These logs seem to be related to a script (react-extension.js), but I’m not sure what’s causing them or if they’re problematic.

3. Iframe Sandbox Warning- The following warning appears:

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preview_bar:1 An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.
  • I’m not sure if this is related to my theme or a third-party app.

4. Early Hints Warning- This warning is also showing up:

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The resource https://*****.net/cdn/shop/t/22/assets/component-megamenu.css?v=6603278935123591491737039066 was preloaded using link preload in Early Hints but not used within a few seconds from the window's load event.
  • It seems to be related to a preloaded CSS file, but I’m not sure how to fix it.

5. Third-Party Cookies Warning- This warning is also present:

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Chrome is moving towards a new experience that allows users to choose to browse without third-party cookies.
  • I understand this is a browser-level warning, but I’m not sure if it’s something I need to address in my store.

What I’ve Tried So Far:- Checked my theme files for syntax errors but couldn’t find any issues.

  • Looked for the react-extension.js file but couldn’t locate it in my theme.

  • Disabled apps to see if the warnings/errors are caused by a third-party script, but the issue persists.

**Questions:**1. How can I locate and fix the Uncaught SyntaxError: Unexpected token ‘;’?

  1. What is react-extension.js, and how can I address the warnings it’s generating?

  2. Should I be concerned about the iframe sandbox warning and the Early Hints warning?

  3. Is the third-party cookies warning something I need to address in my store?

Any help or advice would be greatly appreciated! Thank you in advance.