1//Html
2<form id="myForm" name="myForm">
3    <input id="email" name="email" value="some@email.com" />
4</form>
5
6//JS
7var x=document.forms["myForm"]["email"].value;

1//HTML
2<input type="text" name="name" id="uniqueID" value="value" />
3  
4//JS
5var nameValue = document.getElementById("uniqueID").value;
6

1// having form like this
2
3<form>
4  <div>
5  	<label for="number">Give me number</label>
6	<input type="number" id="number">
7  </div>
8  <div>
9    <button class="btn">Click</button>
10  </div>
11</form>
12
13// this is how u get a value (number)
14document.querySelector("form").addEventListener("submit", get_number);
15function get_number(e){
16    const n = document.getElementById("number").value;
17    console.log('n:', n)
18    e.preventDefault();
19}
20