Uncaught ReferenceError: function is not defined at HTMLUnknownElement.onclick
//Your program can't find the function so do this.
//You can assign the button onclick as an id.
//then attach an eventListener on run time like this:
<button id="btn">Click me!</button>
var btn = document.getElementById("btn");
btn.addEventListener("click", function() {
//Do something here
}, false);Uncaught ReferenceError: $ is not defined
<script src="https://code.jquery.com/jquery-1.9.1.js"></script>
<script src="path-para-seu-script"></script>Uncaught ReferenceError: $ is not defined
You should put the references to the jquery scripts first.
<script src="jquery-3.5.1.js"></script>
<script type="text/javascript" src="script.js"></script>Copyright © 2021 Codeinu
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