Fix javascript error caused by incorrectly escaped url

[juliastri]

This error message appears in the console on all pages in wp-admin:

Uncaught SyntaxError: missing ) after argument list

It is caused by this line, as seen in the browser console:

<script>
( "fetch" in window ) || document.write( "<script src="http://wv5.local.com/wp-includes/js/dist/vendor/wp-polyfill-fetch.min.js?ver=3.0.0"></scr" + "ipt>" );( document.contains ) || document.write( "<script src="http://wv5.local.com/wp-includes/js/dist/vendor/wp-polyfill-node-contains.min.js?ver=3.26.0-0"></scr" + "ipt>" );( window.FormData && window.FormData.prototype.keys ) || document.write( "<script src="http://wv5.local.com/wp-includes/js/dist/vendor/wp-polyfill-formdata.min.js?ver=3.0.12"></scr" + "ipt>" );( Element.prototype.matches && Element.prototype.closest ) || document.write( "<script src="http://wv5.local.com/wp-includes/js/dist/vendor/wp-polyfill-element-closest.min.js?ver=2.0.2"></scr" + "ipt>" );
</script>

[juliastri]

The error message

[juliastri]

The code that appears in sources

[juliastri]

Replying to juliastri:

This error message appears in the console on all pages in wp-admin:

Uncaught SyntaxError: missing ) after argument list

It is caused by this line, as seen in the browser console:

<script>
( "fetch" in window ) || document.write( "<script src="http://wv5.local.com/wp-includes/js/dist/vendor/wp-polyfill-fetch.min.js?ver=3.0.0"></scr" + "ipt>" );( document.contains ) || document.write( "<script src="http://wv5.local.com/wp-includes/js/dist/vendor/wp-polyfill-node-contains.min.js?ver=3.26.0-0"></scr" + "ipt>" );( window.FormData && window.FormData.prototype.keys ) || document.write( "<script src="http://wv5.local.com/wp-includes/js/dist/vendor/wp-polyfill-formdata.min.js?ver=3.0.12"></scr" + "ipt>" );( Element.prototype.matches && Element.prototype.closest ) || document.write( "<script src="http://wv5.local.com/wp-includes/js/dist/vendor/wp-polyfill-element-closest.min.js?ver=2.0.2"></scr" + "ipt>" );
</script>

Note:
I know how to fix it.
The problem is in wp-includes/script-loader.php file where the escaped string inside $polyfill is not rendered correctly.

[juliastri]

patch file attached

[ocean90]

Hello @juliastri, welcome to WordPress Trac!

Thanks for your report. Are you using a custom plugin or something else which modifies the HTML output? Because by default, as you can see in your patch, the string starts with a single quote mark (') and not a double quote mark (") which shouldn't cause this issue.

[desrosj]

I'm also unable to reproduce this.

@juliastri are you using version 5.3.2? trunk?

Going to add close pending more feedback.

[hellofromTonya]

Hello @juliastri,

I'm closing this ticket as it's been a year since feedback was requested. However, if this problem persists today, please feel free to reopen and provide us with more information, i.e. to help us further investigate.