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event handling basics

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Original file line number	Diff line number	Diff line change
`@@ -983,3 +983,15 @@ var clone = oldNode.cloneNode(true);`
`983`	`983`	`//then replace`
`984`	`984`	`oldnode.parentNode.replaceChild(clone, oldNode);`
`985`	`985`	```
	`986`	`+`
	`987`	`+## event handling`
	`988`	`+`
	`989`	+* no ```onclick``` in HTML (seriously :)
	`990`	`+* usually via framework but worth knowing the basics`
	`991`	+* ```EventTarget.addEventListener(eventType, listener, useCapture)``` adds an event handler
	`992`	`+* event type - String representing event type to capture`
	`993`	`+* listener - object implementing EventListener interface, or simply a function`
	`994`	`+* useCapture - all events will events dispathed to this listener first before other listeners beneath this in the DOM tree`
	`995`	+* ```addEventListener``` is not available in IE8 and before
	`996`	`+* useCapture - optional (with default=false) in recent browser`
	`997`	`+* just always pass useCapture in for brodest compatibility`

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