Unique custom icon for review page only

Development
3

I tried that:

    api.onPageChange((url) => {
       if (window.location.href.indexOf("review") > -1) {
             api.replaceIcon('check', 'full-circle-icon');
       }
    }

But it’s not working…
I have this error:

SyntaxError: /discourse/theme-35/initializers/theme-field-379-common-html-script-1: Unexpected token, expected “,” (97:5)

Did I do something wrong?