Element.getElementsByClassName-null-undef.html (1112B)
1 <!doctype html> 2 <title>getElementsByClassName and null/undefined</title> 3 <link rel="author" title="Ms2ger" href="mailto:ms2ger@gmail.com"> 4 <link rel="help" href="https://html.spec.whatwg.org/multipage/#dom-getelementsbyclassname"> 5 <script src="/resources/testharness.js"></script> 6 <script src="/resources/testharnessreport.js"></script> 7 <div id="log"></div> 8 <div id="test"> 9 <p id="p1"></p> 10 <p class="undefined" id="p2"></p> 11 <p class="null" id="p3"></p> 12 <p class="undefined null" id="p4"></p> 13 </div> 14 <script> 15 test(function() { 16 var wrapper = document.getElementById("test"); 17 assert_equals(wrapper.getElementsByClassName(undefined).length, 2); 18 assert_equals(wrapper.getElementsByClassName(undefined)[0], 19 document.getElementById("p2")); 20 assert_equals(wrapper.getElementsByClassName(undefined)[1], 21 document.getElementById("p4")); 22 /* 23 assert_equals(wrapper.getElementsByClassName(null).length, 2); 24 assert_equals(wrapper.getElementsByClassName(null)[0], 25 document.getElementById("p3")); 26 assert_equals(wrapper.getElementsByClassName(null)[1], 27 document.getElementById("p4")); 28 */ 29 }); 30 </script>