javascript - Jquery mouse events don't fire -

-

i have strange problem. example code works [here][1] quiet fine, have same code in aptana studio editor , when try in chrome or eclipse browser events don't fire. can't imagine what's problem, because it's same code ...

html

<!doctype html> <html>     <head>         <title>orderscreen</title>         <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>         <script src="js/script.js" type="text/javascript"></script>     </head>     <body>                 <a href="">test</a>     </body> </html>

jquery

$("a").mouseup(function() {     cleartimeout(presstimer);     // clear timeout     return false; }).mousedown(function() {     // set timeout     presstimer = window.settimeout(function() {         alert("hcbdhaf")     }, 1000);     return false; }).click(function() {     alert("dfsdg"); });

if code quoted, problem elements don't exist of when try hook event handlers them. jsfiddle's default settings hide problem you. (look on left, , you'll see code isn't run until load event fires — very, late in page load process.)

to fix it, either:

  1. move script tags end of document, before or after closing </body> tag. time browser runs script, elements exist. recommendation of yui team , google's web engineers like too.

  2. use jquery's ready event.

in conjunction either of those, might @ using event delegation instead of directly hooking events on elements. mouseup , mousedown handlers attached each a element individually. that's lot of hookups. if there's container of a elements in (body or better yet, nearer), might instead hook event on container (since events bubble) , check see if event originated in a element. jquery supports event delegation, doing of hard work you, via delegate (which because it's explicit) , more recently, 1 of half-dozen variations of arguments pass on.


Comments

Post a Comment

Popular posts from this blog

django - How can I change user group without delete record -

-
on website user have 1 group. , user can change group. it's made user.groups.clear() and user.groups.add(new_group) but it's not efficient, because there 2 sql query: delete, insert. how can change group update query? user , group related each other using manytomanyfield . means intersection table exists relating both entities, , if don't specify model map (using through attribute) django creates 1 you. looking @ sources django.contrib.auth.models see that's case. fortunatly, can access intermediary model using through attribute of manager (in case, user.groups.through ). can use regular model. example: >>> alice = user.objects.create_user('alice', 'alice@example.com', 'alicepw') >>> employee = group.objects.create(name='employee') >>> manager = group.objects.create(name='manager') >>> alice.groups.add(employee) >>> alice.groups.all() [<group: employee...
Read more

java - EclipseLink JPA Object is not a known entity type -

-
i have strange problem eclipselink , object want persist. have 1 object (keypointlistimpl) stores object keypointimpl in list. persisting keypointimpl objects works great if try persist keypointlistimpl object java.lang.illegalargumentexception says object keypointimpl isn't known entity type. here keypointimpl code: @entity @table(name="keypoints") public class keypointimpl implements keypoint { @id @generatedvalue(strategy = generationtype.identity) private int id; @enumerated(enumtype.string) private detectortype keypointtype; private float x; private float y; private float size; private float angle; private float response; private int octave; private int classid; ... } here keypointlistimpl code: @entity @table(name="keypointlists") public class keypointlistimpl implements keypointlist { @id @generatedvalue(strategy = generationtype.identity) private int id; @onetoone(cascade={ca...
Read more

java - Need to add SOAP security token -

-
i need set custom soap header attribute on jax-ws generated webservice client. case webservice calls must go through proxy server requiring specific token (recieved web request header) present in soap request header. e.g.: 1 carserviceservice service = null; 2 service = new carserviceservice(new url(url), new qname(qname); 3 carserviceendpoint port = service.getcarserviceport(); it seems in line 3 wsdl retrieved , call fails due missing security token. 1 point direction on how done? a detailed example has been mentioned here: creating , deploying jax-ws web service on tomcat 6 this article shows how create , use security token .
Read more