Submitting forms using the GET method in JavaScript

Let's implement a form submission using the GET method with an example. Let's say we have a form and numbers are entered into its inputs:

public/form.html<form action="/handler/" method="GET">
  <input name="num1">
  <input name="num2">
  <input type="submit">
</form>

Let a server find the sum of received numbers and send the result back to the browser. First, we get the sent numbers:

server.jsexport default {
  '/handler/': function({get}) {
    console.log(get.num1);
    console.log(get.num2);
    
    return 'form data received';
  }
}

Now let's find their sum and send it back to the browser:

server.jsexport default {
  '/handler/': function({get}) {
    return Number(get.num1) + Number(get.num2);
  }
}