custom-events.html (4058B)
1 <!DOCTYPE html> 2 <title>Custom events with the names "end" and "endEvent" and their effects on various types of event listeners</title> 3 <script src="/resources/testharness.js"></script> 4 <script src="/resources/testharnessreport.js"></script> 5 <svg height="0"> 6 <rect width="100" height="100" fill="blue"> 7 <animate attributeName="x" begin="0s" from="0" to="100" 8 id="targetWithAttributeHandlers" 9 onend="gOnEndHandlerCallCount++" 10 onendEvent="gNonexistentOnEndEventHandlerCallCount++"/> 11 <animate attributeName="y" begin="0s" from="0" to="100" 12 id="targetWithIDLListeners"/> 13 <animate attributeName="width" begin="0s" from="100" to="120" 14 id="targetWithRegularListeners"/> 15 </rect> 16 </svg> 17 <script> 18 // This test checks how various types of event handlers / listeners react to custom 19 // events with the names "end" and "endEvent". 20 // The SVG spec does not define an event called "end" - the animation event is called "endEvent". 21 // The SVG spec does not define an IDL property called "onendEvent", only one called "onend". 22 // The SVG spec does not define an attribute called "onendEvent", only one called "onend". 23 24 // Incremented in the "onend" attribute event handler. 25 gOnEndHandlerCallCount = 0; 26 // "onendEvent" is an invalid attribute name so this should never be incremented. 27 gNonexistentOnEndEventHandlerCallCount = 0; 28 // Incremented in the "onend" IDL property event listener. 29 gOnEndListenerCallCount = 0; 30 // "onendEvent" is an unrecognized property name so this should never be incremented. 31 gNonexistentOnEndEventListenerCallCount = 0; 32 // Incremented in the "endEvent" event listener. 33 gEndEventListenerCallCount = 0; 34 // Incremented in the "end" event listener. This should only happen for manually-created events with the name "end". 35 gEndListenerCallCount = 0; 36 37 let targetWithAttributeHandlers = document.getElementById("targetWithAttributeHandlers"); 38 let targetWithIDLListeners = document.getElementById("targetWithIDLListeners"); 39 targetWithIDLListeners.onend = () => { gOnEndListenerCallCount++; }; 40 targetWithIDLListeners.onendEvent = () => { gNonexistentOnEndEventListenerCallCount++; }; 41 let targetWithRegularListeners = document.getElementById("targetWithRegularListeners"); 42 targetWithRegularListeners.addEventListener("endEvent", () => { gEndEventListenerCallCount++; }); 43 targetWithRegularListeners.addEventListener("end", () => { gEndListenerCallCount++; }); 44 45 test(t => { 46 targetWithAttributeHandlers.dispatchEvent(new Event("end")); 47 assert_equals(gOnEndHandlerCallCount, 0); 48 assert_equals(gNonexistentOnEndEventHandlerCallCount, 0); 49 targetWithIDLListeners.dispatchEvent(new Event("end")); 50 assert_equals(gOnEndListenerCallCount, 0); 51 assert_equals(gNonexistentOnEndEventListenerCallCount, 0); 52 targetWithRegularListeners.dispatchEvent(new Event("end")); 53 assert_equals(gEndEventListenerCallCount, 0); 54 assert_equals(gEndListenerCallCount, 1); 55 }, "custom events with the name 'end' should only call the event listener for the event 'end' and no attribute handlers or IDL listeners"); 56 57 test(t => { 58 gOnEndHandlerCallCount = 0; 59 gNonexistentOnEndEventHandlerCallCount = 0; 60 gOnEndListenerCallCount = 0; 61 gNonexistentOnEndEventListenerCallCount = 0; 62 gEndEventListenerCallCount = 0; 63 gEndListenerCallCount = 0; 64 targetWithAttributeHandlers.dispatchEvent(new Event("endEvent")); 65 assert_equals(gOnEndHandlerCallCount, 1); 66 assert_equals(gNonexistentOnEndEventHandlerCallCount, 0); 67 targetWithIDLListeners.dispatchEvent(new Event("endEvent")); 68 assert_equals(gOnEndListenerCallCount, 1); 69 assert_equals(gNonexistentOnEndEventListenerCallCount, 0); 70 targetWithRegularListeners.dispatchEvent(new Event("endEvent")); 71 assert_equals(gEndEventListenerCallCount, 1); 72 assert_equals(gEndListenerCallCount, 0); 73 }, "custom events with the name 'endEvent' should call 'onend' attribute handlers and IDL property listeners, and 'endEvent' listeners"); 74 75 </script>