javascript - Make Knockout observable apply instantly? -


i have section of page bound knockout viewmodel. when click link loads data , displays little farther down. want display little loading img while goes out , loads data hide when complete. have following code (stripped down show important parts). ajax call not async, set false other code else using cannot change it. problem "self.loading(false)" doesn't fired until ajax call complete, doesnt appear show @ all. if switch ajax call async works intended. wondering why ajax call blocking observables change since called before it, shouldn't fire immediately. there way force trigger immediately.

html:

<a data-bind="click: getinfo" href="javascript:;">      <img data-bind="visible: loading" src="myimg.jpg" alt="loading" /> </a>

ko: 

 self.loading = ko.observable(false);  self.getinfo = function () {     self.loading(true);     ajaxcall().done(function (data){        self.loading(false);     }  };

the observable , dom being updated immediately, can't see because browser doesn't around drawing screen. request blocking redraw because... it's non-async. exact reason should not make non-async requests.

as workaround try force event loop spin once using settimeout 0 timeout run horrible sync request after observable change, in seriousness, fix request async. browsers not guaranteed (including running loading animations) when code blocking.


Comments

Post a Comment

Popular posts from this blog

c++ - Difference between pre and post decrement in recursive function argument -

i have following sample code used pre-decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(--c); cout << c << endl; return; } } this function give output input 4 : dp3 dp2 dp1 dp0 0 1 2 3 but when use post decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(c--); cout << c << endl; return; } } output goes in infinite loop dp4 can explain me in detail why happens ? this happens because function(c--) called same value of c , when finishes c decremented. recursively called, hence called same value no chance of return , hit stack overflow error. assume this, int x = 1, y = 0; y = x++ result y == 1 , x == 2. if y = ++x , bot x , y 2.
Read more

php - Nothing but 'run(); ' when browsing to my local project, how do I fix this? -

i added new project. made mistake in projectname.conf file in sites-available apache2, led me reinstalling apache2. after reinstalling , re-enabling projects on every page of every project .. <body> run(); </body> .. i've run composer update, restarted service, restarted pc, checked config files, tried disabling new project. there nothing in error log, , access.log: 127.0.0.1 - - [15/may/2015:01:40:47 +0200] "get / http/1.1" 304 181 "-" "mozilla/5.0 (x11; ubuntu; linux x86_64; rv:38.0) gecko/20100101 firefox/38.0" maybe i'm forgetting apache2 reinstall? don't think did different last time installed it. looks haven't setup php correctly. take @ this great guide , maybe you're forgetting link php config apache2.
Read more

php - How can I echo out this array? -

i don't know how go grabbing data in variable , put foreach loop. class tree{ private $info = array( array('name'=>'jim','state'=>'nu','company'=>'nu','phone'=>array('cell'=>'5615111111','office'=>'5611111111'),'email'=>array('primary'=>'exs@example.com','ex@there.com')), array('name'=>'joe smith','city'=>'phoenix','phone'=>'4805551111','email'=>'jsmith@some_email.com'), array('name'=>'john doe','city'=>'chandler','company'=>'doe co.','email'=>array('jdoe@gmail.com','personal'=>'email@email.com'),'phone'=>'6025550002') ); } if you're inside of class, can access private variable using $this->variablename . example, i...
Read more