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15 Cards in this Set
- Front
- Back
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JS Arrays |
var x = [] |
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JS Objects |
var x = { }
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JS Functions |
function func() {}; |
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JS Anonymous Functions |
function(a,b) {return a+b} |
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JS Events and Event Handling |
click, mouseover, etc
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JS Capture Phase |
bubbling = child first
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JS Bubbling Phase |
capture = parent first |
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JS Event Target vs Current Event Target |
the target is the element that receives an event, current target is the element that's listening. Container with buttons inside. |
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Event objects and properties: preventDefault(), stopPropagation |
prevents default action of an event, such as a clicked link taking a user to the linked page |
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addEventListener() method on elements |
easy |
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Different ways of setting event listeners |
1. 2. document.getElementById("test") -> x.onclick = function() {}3. .addEventListener("click", function(){}, [phase]); |
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AJAX |
Asynchronous Javascript and XML |
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XMLHttpRequest object |
new XMLHttpRequest() onReadyStateChange... etc etc |
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XMLHttpRequest properties |
.readyState 0 before open, 1 open is called, 2 response header received, 3 response is loading, 4 response is complete .status 200 = complete xhr.responseText |
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XMLHttpRequest methods |
open("get","servlet?blah=blah&etc=etc") open("post","servlet") send(req.body) |
