javascript - Dynamically created JQUERY buttons defaulting to last element created -


trying create dynamic jquery elements added html page. click on event, create elements array , new elements go different functions. far i've got:

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">  <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="content-type" content="text/html; charset=utf-8">     <head>         <title>adding buttons dynamically jquery </title>         <link type = "text/css" rel="stylesheet" href="jquery-ui.css">         <script type = "text/javascript" src="jquery.min.js"></script>         <script type = "text/javascript" src="jquery-ui.min.js"></script>      </head>     <body>         <p>firing off without hitch, html page loaded properly</p>          <button id="classchoice">show classes</button>          <div id='classsection' style="margin:50px">this our new section test area</div>           <script type="text/javascript">                 //classes array             var classesarray = [ 'spanish','english','french'];              var classindex = 0;                 //button functionality              var btn = document.getelementbyid('classchoice');             btn.addeventlistener("click",click2handler,false);                       //button handler             function click2handler(){                       alert('clicked button!');  /*code create variable new button */                   evaluator();                  }                   //evaluator function                 function evaluator()                 {                     if(classindex<classesarray.length)                     {//only operate length of classes array                         for(var = 0; i< classesarray.length;i++)                         {                         var wherecreated = jquery('#classsection');//where add                         var id = 'btn' + classesarray[classindex];                         wherecreated.append('<br><button id="' + id + '">' + classesarray[classindex] + '</button>');                         jquery('#'+id).button().click(function(){                             alert('dynamically added button: '+ id + ' has been clicked...going selector function');alert('id of button clicked: ' + id);                             selector(id);                         });                         console.log('wherecreated: '+wherecreated+". id: " +id);                         classindex++;                                                    }                         console.log('classindex: ' + classindex);                      }                 }                 function selector(btnselection)                 {                     switch(btnselection)                     {                         case 'btnspanish':                          alert('buenos dias!'); break;                         case 'btnenglish':                         alert('howdy partner!');break;                         case 'btnfrench':                         alert('oui oui monsieur!');break;                         default : alert('unhandled exception inside selection');                         break;                      }                 }            </script>     </body> </html>

the problem last button created has id evaluated inside selector function, in case btnfrench. how each button pass right id?

you create closure:

(function (id) {     jquery('#' + id).button().click(function () {         alert('dynamically added button: ' + id + ' has been clicked...going selector function');         alert('id of button clicked: ' + id);         selector(id);     }); })(id);

the closure defines new scope. necessary because handler isn't called until after loop has finished, not part of scope @ time called, or (in cases) has last possible value loop. (src)


Comments

Post a Comment

Popular posts from this blog

powershell Start-Process exit code -1073741502 when used with Credential from a windows service environment -

i'm running strange behavior powershell start-process call. here call: $process = start-process ` "c:\somepath\mybinary.exe" ` -passthru ` -credential $defaultcredential ` -wait ` -workingdirectory "c:\somepath" ` -loaduserprofile if ($process.exitcode -ne 0) { #do } this call return exit code - 1073741502 . after quick search, exit code seems related generic error when program not load required dll (aka. status_dll_init_failed ). when run without -credential $credential program runs correctly. in order isolate problem, manually launched some.exe in prompt target credential , runs smoothly. so problem seems come way start-process cmdlet launch process. i found potential solutions problem tried apply no luck : link , link . would have idea of what's going on here ? edit 1: run proc mon monitoring program activities when launched directly or via powershell script. problem seems occur when loading kernelbase
Read more

twig - Using Twigbridge in a Laravel 5.1 Package -

i'm trying create laravel 5.1 package uses twigbridge instead of .php views. can normal .php views display fine, when try make use of .twig templates i'm met error. possible use twigbridge templates when creating views laravel package or pretty stuck blade , php ? edit 1: loading twig template without extending works. it's when start using {% extends 'file' %} error comes out. i error error loading /virtual/laravel/packages/username/mypackage/src/views/sample.twig: template "templates.master" not defined () in "/virtual/laravel/packages/username/mypackage/src/views/sample.twig" @ line 1. my folders username |_ mypackage |_ src |_ controllers - samplecontroller.php |_ views |_ templates - master.twig - sample.twig twig template sample.twig {% extends 'templates.master' %} {% block content %} {{ parent()
Read more

c# - LINQ join Entities from HashSet's, Join vs Dictionary vs HashSet performance -

i have hashset's each stores t, have written test application compares different relation algorithms can think of, i'm not pleased results getting. does there exist more efficient ways of achieving object relations, once testing? using system; using system.collections.generic; using system.linq; using system.text; using system.threading.tasks; using system.diagnostics; namespace linqtests { class program { static void main(string[] args) { hashset<user> usertable = new hashset<user>(); hashset<userproperty> userpropertytable = new hashset<userproperty>(); #region lets create dummy data. console.writeline("please wait while creating dummy data, can take while..."); console.writeline(""); int rows = 1000000; for(int x = 0; x < rows; x++) { random rnd = new random(); // ad
Read more