Created
October 15, 2015 17:49
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jQuery.on(event, selector, callback) in pure js, requies 'querySelectorAll'
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/* | |
* how to use: | |
* fn: filterEventHandler(selector, callback) | |
* selector: selector for querySelectorAll, filtering event source, like jQuery.on(event, selector, callback) | |
* callback: event handler function | |
* returns: filtering function which contains reference of your callback | |
* | |
* code: | |
* element.addEventListener('eventname', filterEventHandler('.filter[selector*="for querySelectorAll"]', function (e) { | |
* // this code will be called only when element matched to selector | |
* console.log(e.filterdTarget, "This is matched element. You can use e.target as original source element."); | |
* })); | |
* or | |
* element.onEvent = filterEventHandler('.selector', function (e) { console.log("matched!"); }); | |
* | |
* license: public domain | |
* author: <lianol> https://github.com/a-c-t-i-n-i-u-m | |
*/ | |
var filterEventHandler = function (selector, callback) { | |
return (!callback || !callback.call) ? null : function (e) { | |
var target = e.target || e.srcElement || null; | |
while (target && target.parentElement && target.parentElement.querySelectorAll) { | |
var elms = target.parentElement.querySelectorAll(selector); | |
for (var i = 0; i < elms.length; i++) { | |
if (elms[i] === target) { | |
e.filterdTarget = elms[i]; | |
callback.call(elms[i], e); | |
return; | |
} | |
} | |
target = target.parentElement; | |
} | |
}; | |
}; |
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