Pasar el valor de entrada HTML como un parámetro de función de JavaScript

PHOTO EMBED

Fri Nov 04 2022 15:17:36 GMT+0000 (Coordinated Universal Time)

Saved by @modesto59 #html 

<body>
  <h1>Adding 'a' and 'b'</h1>

  a: <input type="number" name="a" id="a"><br> b: <input type="number" name="b" id="b"><br>
  <button onclick="add(document.getElementById('a').value,document.getElementById('b').value)">Add</button>

  <script>
    function add(a, b) {
      var sum = parseInt(a, 10) + parseInt(b, 10);
      alert(sum);
    }
  </script>
</body>



OTRO EJEMPLO


<script>
function eq(value) {
  console.log(value);
  ViewImg = window.open('http://localhost/coord.php?' + value, 'ViewImg', 'width=<?php print $realWidthNewWindow; ?>,height=<?php print $realHeightNewWindow; ?>', 'status=no', 'titlebar=0');
}
</script>

<form id='testform_eq' name='testform_new'>
  <input type='text' id='val2' name='val2'>
  <input type='button' value='Submit' onclick='eq(document.getElementById("val2").value)'>
</form>



OTRO EJEMPLO

<body>
<h1>Adding 'a' and 'b'</h1>
<form>
  a: <input type="number" name="a" id="a"><br>
  b: <input type="number" name="b" id="a"><br>
  <button onclick="add()">Add</button>
</form>
<script>
  function add() {
    var m = document.getElementById("a").value;
    var n = document.getElementById("b").value;
    var sum = m + n;
    alert(sum);
    
    Var sum = parseFloat(a)+parseFloat (b); 
  }
</script>
</body>
content_copyCOPY

https://stackoverflow.com/questions/21397743/passing-html-input-value-as-a-javascript-function-parameter