How to fix Uncaught ReferenceError: name is not defined error?

Question

JavaScript

Hello.

Encountered an error:
Uncaught ReferenceError: asd is not defined

Here is the code:
HTML

<div class="text">
   <div class="price">99.000</div>
   <div class="productName">REVO Morning</div>
   <div class="inf">đắng, hậu ngọt, hương hoa </div>
   <div class="cart-btn">
     <button class="in__cart" onclick="asd()">MUA NGAY</button>
     <a href="" class="deetails">CHI TIẾT</a>
   </div>
 </div>

typescript

function asd(){
  console.log('asd');
}

JSFiddle
https://jsfiddle.net/pypochek/9jvpz3ex/1/

Please help me understand.

Answer 1

<script src="script.js"></script>
You didn't include the js file in the html document.

Answer 2

there is also a second solution - window.asd= function asd()....