fire-selectionchange-event-on-textcontrol-element-on-pressing-backspace.html (1882B)
1 <!DOCTYPE html> 2 <meta charset="utf-8"> 3 <title>Test selectionchange event fired on Text Control element</title> 4 <script src="/resources/testharness.js"></script> 5 <script src="/resources/testharnessreport.js"></script> 6 <script src="/resources/testdriver.js"></script> 7 <script src="/resources/testdriver-vendor.js"></script> 8 9 <input id="input" type="text" value="hello"> 10 11 <script> 12 const element = document.querySelector("input"); 13 const events_on_document = []; 14 document.addEventListener("selectionchange", ev => { 15 events_on_document.push(ev); 16 }); 17 18 const events_on_input = []; 19 element.addEventListener("selectionchange", ev => { 20 events_on_input.push(ev); 21 }); 22 23 promise_test(async () => { 24 element.focus(); 25 element.setSelectionRange(5, 5); 26 await new Promise(resolve => step_timeout(resolve, 500)); 27 events_on_document.length = 0; 28 events_on_input.length = 0; 29 30 assert_equals(element.selectionStart, 5, "selectionStart before pressing backspace key"); 31 assert_equals(element.selectionEnd, 5, "selectionEnd before pressing backspace key"); 32 33 await new test_driver.send_keys(element, "\uE003"); 34 35 assert_equals(element.selectionStart, 4, "selectionStart after pressing backspace key"); 36 assert_equals(element.selectionEnd, 4, "selectionEnd after pressing backspace key"); 37 38 // Waits a short time to allow any events to be processed. 39 await new Promise(resolve => step_timeout(resolve, 500)); 40 assert_equals(events_on_input.length, 1); 41 42 //selectionchange event fired on a text control should bubble to the document 43 assert_equals(events_on_document[0].target, element, "Event target should be the input element"); 44 assert_equals(events_on_document.length, 1); 45 46 }, "selectionchange event fired on an input element"); 47 </script>