Cross-browser function to trigger DOM events.
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May 22, 2018 09:14
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Cross-browser triggerEvent function done with 127 bytes of JavaScript
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| <!doctype html> | |
| <title>Demo</title> | |
| <span id="btn">Button</span> | |
| <script> | |
| // use addEvent cross-browser shim: https://gist.github.com/dciccale/5394590/ | |
| var addEvent = function(a,b,c){try{a.addEventListener(b,c,!1)}catch(d){a.attachEvent('on'+b,c)}}; | |
| // triggerEvent | |
| var triggerEvent = function(c,d,b,a){b=document;b.createEvent?(a=new Event(d),c.dispatchEvent(a)):(a=b.createEventObject(),c.fireEvent("on"+d,a))}; | |
| // DOM element | |
| var element = document.getElementById('btn'); | |
| // callback function | |
| var callback = function () { alert('Button clicked!'); }; | |
| addEvent(element, 'click', callback); | |
| // alert 'Button clicked!' when trigger click event | |
| triggerEvent('click', element, callback); | |
| </script> |
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| /** | |
| * @param target can be any DOM Element or other EventTarget | |
| * @param type Event type (i.e. 'click') | |
| * @param doc Placeholder for document | |
| * @param event Placeholder for creating an Event | |
| */ | |
| function (target, type, doc, event) { | |
| doc = document; | |
| if (doc.createEvent) { | |
| event = new Event(type); | |
| target.dispatchEvent(event); | |
| } else { | |
| event = doc.createEventObject(); | |
| target.fireEvent('on' + type, event); | |
| } | |
| }; |
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| function(c,d,b,a){b=document;b.createEvent?(a=new Event(d),c.dispatchEvent(a)):(a=b.createEventObject(),c.fireEvent("on"+d,a))} |
This fixes the error:
Uncaught TypeError: c.dispatchEvent is not a function
function(target, type, doc, event) {
doc = document;
if (doc.createEvent) {
event = doc.createEvent('HTMLEvents');
event.initEvent(type, true, true);
target.dispatchEvent(event);
} else {
event = doc.createEventObject();
target.fireEvent('on' + type, event);
}
};function (a,b,c,d){c=document,c.createEvent?(d=c.createEvent("HTMLEvents"),d.initEvent(b,!0,!0),a.dispatchEvent(d)):(d=c.createEventObject(),a.fireEvent("on"+b,d))}
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triggerEvent in demo mismatched signature with actual implementation. First argument should be an element and second one is event.