javascript - If hasClass condition jquery not working properly -


i trying execute alerts onclick events , conditions jquery statement. seems event handlers don't work properly, due fact missing in event handling logic. have 1 button, id #bottone1, , have menu buttons id #b1 , #b2.

the first event works fine, adds correctly class "cliccatoinvoca1_onready". when click on #bottone1 starts the first alert "cliccatoinvoca1_onready". onclick event $("#b1") works properly, removes class "cliccatoinvoca1_onready" , replaces class "cliccatoinvoca1".

this point encounter first problem

when click on #bottone1 comes first alert "cliccatoinvoca1_onready", , "cliccatoinvoca1". when click on #b2 , afer click on #bottone1 executes 3 alerts, "cliccatoinvoca1_onready", "cliccatoinvoca1" , "cliccatoinvoca3".

so, main problem doesn't work if condition execute 1 alert @ time. when click on #bottone1 executes alerts in sequence.

this document.ready function

$(document).ready(function () {     $("#select-1").multiselect();     invoca1();     $("#bottone1").addclass("cliccatoinvoca1_onready btn btn-default");     if ($("#bottone1").hasclass("cliccatoinvoca1_onready")) {         $("#bottone1").click(function () {             alert("cliccatoinvoca1_onready");             keys = [];             $('input[name="multiselect_select-1"]:checked').each(function () {                 keys.push(this.value);             });         });     }      $("#b1").click(function () {         invoca1();         $("#bottone1").removeclass("cliccatoinvoca1_onready noclass").addclass("cliccatoinvoca1");         if ($("#bottone1").hasclass("cliccatoinvoca1")) {             $("#bottone1").click(function () {                 alert("cliccatoinvoca1");                 keys = [];                 $('input[name="multiselect_select-1"]:checked').each(function () {                     keys.push(this.value);                 });             });         }     });      $("#b2").click(function () {         invoca3();         $("#bottone1").removeclass("cliccatoinvoca1").addclass("cliccatoinvoca3");         if ($("#bottone1").hasclass("cliccatoinvoca3")) {             $("#bottone1").click(function () {                 alert("cliccatoinvoca3");                 keys = [];                 $('input[name="multiselect_select-1"]:checked').each(function () {                     keys.push(this.value);                 });             });         }     }); });

change use delegated event handlers, attached non-changing ancestor element, each matching selector:

e.g. this:

$(document).on('click', "#bottone1.cliccatoinvoca1_onready", function() {     alert("cliccatoinvoca1_onready");     keys = [];     $('input[name="multiselect_select-1"]:checked').each(function () {          keys.push(this.value);     }); });

the above need 1 click handler, repeat pattern other classes can have. never need hasclass checks.

your other code becomes simple this:

$("#b1").click(function () {      invoca1();      $("#bottone1").removeclass("cliccatoinvoca1_onready noclass").addclass("cliccatoinvoca1");  });

delegated handlers:

  • delegated event handlers work listening event (in case click) bubble ancestor element.
  • you choose closest non-changing ancestor element, document default if nothing else closer/convenient. not use 'body' has bug related styling can cause mouse events not bubble it.
  • then applies jquery selector elements in bubble-chain.
  • it then applies function, matching elements that caused event.
  • the result elements need match @ event time , not event registration time.

this pattern simplify code significantly.

the entire example become this:

$(document).ready(function () {     $("#select-1").multiselect();     invoca1();     $("#bottone1").addclass("cliccatoinvoca1_onready btn btn-default");      $("#b1").click(function () {         invoca1();         $("#bottone1").removeclass("cliccatoinvoca1_onready noclass").addclass("cliccatoinvoca1");     });      $("#b2").click(function () {         invoca3();         $("#bottone1").removeclass("cliccatoinvoca1").addclass("cliccatoinvoca3");     });      $(document).on('click', "#bottone1.cliccatoinvoca1", function () {         alert("cliccatoinvoca1");         keys = [];         $('input[name="multiselect_select-1"]:checked').each(function () {             keys.push(this.value);         });     });      $(document).on('click', "#bottone1.cliccatoinvoca3", function () {         alert("cliccatoinvoca3");         keys = [];         $('input[name="multiselect_select-1"]:checked').each(function () {             keys.push(this.value);         });     }); });

notes:

  • i ignoring fact event handlers contain identical code , assume real code has different operations.

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