html/semantics/forms/attributes-common-to-form-controls/disabled-elements-01.html

<!DOCTYPE html>
<title>HTMLFormElement: the disabled attribute</title>
<link rel="author" title="Eric Casler" href="mailto:ericorange@gmail.com">
<link rel="help" href="https://html.spec.whatwg.org/multipage/#enabling-and-disabling-form-controls:-the-disabled-attribute">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id="log"></div>
<div id="root"></div>
<script>
// Elements tested for in this file
var types = ["button", "input", "select", "textarea"];
// no tests for: optgroup, option, fieldset

var root = document.getElementById("root");
for (var element_type = 0; element_type < types.length; element_type++) {
  test(function() {
    root.innerHTML = "<"+types[element_type]+" + id='elem'></"+types[element_type]+">";

    var elem = document.getElementById("elem");
    assert_false(elem.disabled);
  },
  "Test ["+types[element_type]+"]: default behaviour is NOT disabled");

  test(function() {
    var formats = ["disabled",
      "disabled=disabled", "disabled='disabled'",
      "disabled='true'", "disabled=true",
      "disabled='false'", "disabled=false"];

    for (var f = 0; f < formats.length; f++) {
      root.innerHTML = "<"+types[element_type]+" id='elem' " + formats[f] + "></"+types[element_type]+">";

      var elem = document.getElementById("elem");
      assert_true(elem.disabled);
    }
  },
  "Test ["+types[element_type]+"]: verify disabled acts as boolean attribute");

  test(function() {
    root.innerHTML = "<"+types[element_type]+" id='elem'></"+types[element_type]+"><input id='other' value='no event dispatched'></input>";
    var elem = document.getElementById("elem"),
      other = document.getElementById("other");

    assert_equals(other.value, "no event dispatched");

    elem.disabled = true;
    assert_true(elem.disabled);

    elem.onclick = function () {
      // change value of other element, to avoid *.value returning "" for disabled elements
      document.getElementById("other").value = "event dispatched";
    };

    // Check if dispatched event executes
    var evObj = document.createEvent('Events');
    evObj.initEvent("click", true, false);
    elem.dispatchEvent(evObj);
    assert_equals(other.value, "event dispatched");
  },
  "Test ["+types[element_type]+"]: synthetic click events should be dispatched");

  test(function() {
    root.innerHTML = "<"+types[element_type]+" id='elem'></"+types[element_type]+"><input id='other' value='no event dispatched'></input>";
    var elem = document.getElementById("elem"),
      other = document.getElementById("other");

    assert_equals(other.value, "no event dispatched");

    elem.disabled = true;
    assert_true(elem.disabled);

    elem.onclick = function () {
      // change value of other element, to avoid *.value returning "" for disabled elements
      document.getElementById("other").value = "event dispatched";
    };

    // Check that click() on a disabled element doesn't dispatch a click event.
    elem.click();
    assert_equals(other.value, "no event dispatched");
  },
  "Test ["+types[element_type]+"]: click() should not dispatch a click event");
}
root.innerHTML = "";
</script>