[Solved] How do i check if my string contains certain words

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It should work like that

<button onclick="myFunction()">navigate</button>
<script>
   function myFunction() 
   {
       var url = document.URL;
       if (window.location.href.indexOf('brand') > -1) 
       {
           alert('yes');
       }
       url = url.replace('.html','.php')
       window.location.href = url;
    }
</script>

solved How do i check if my string contains certain words