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Why Doesn\'t My `onClick` Event Listener Work in IE8, and How Can I Fix It?
Why Doesn\'t My `onClick` Event Listener Work in IE8, and How Can I Fix It?
Nov 28, 2024 am 08:44 AM
IE8 onClick Event Listener Compatibility Issue
Problem:
In the provided code, the JavaScript event listener for the li element is not functioning in the IE8 browser.
Solution:
IE8 lacks the addEventListener method, so an alternative cross-browser event handling solution is required. The following code provides a polyfill for addEventListener that works in both standard and legacy browsers:
var hookEvent = (function() {
var div;
// Standard-compliant browsers
function standardHookEvent(element, eventName, handler) {
element.addEventListener(eventName, handler, false);
return element;
}
// Legacy IE browsers
function oldIEHookEvent(element, eventName, handler) {
element.attachEvent("on" + eventName, function(e) {
e = e || window.event;
e.preventDefault = oldIEPreventDefault;
e.stopPropagation = oldIEStopPropagation;
handler.call(element, e);
});
return element;
}
function oldIEPreventDefault() {
this.returnValue = false;
}
function oldIEStopPropagation() {
this.cancelBubble = true;
}
div = document.createElement('div');
if (div.addEventListener) {
div = undefined;
return standardHookEvent;
}
if (div.attachEvent) {
div = undefined;
return oldIEHookEvent;
}
throw "Neither modern event mechanism (addEventListener nor attachEvent) is supported by this browser.";
})();
Usage:
In the provided code, replace the getElementById().addEventListener() calls with:
hookEvent(document.getElementById("hd_vertical"), "click", function(e) {
// ...
});
Additional Notes:
- IE8 also does not support getElementsByClassName. Use querySelectorAll instead.
- The provided polyfill normalizes some event properties but not all. Consider using a library like jQuery for comprehensive event handling.
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