Best way to remove an event handler in jQuery

Question

I have an input type  image   This acts like the cell notes in Microsoft Excel  If someone enters a number into the text box that this input-image is paired with  I setup an event handler for the input-image  Then when the user clicks the image  they get a little popup to add some notes to the data   My problem is that when a user enters a zero into the text box  I need to disable the input-image s event handler  I have tried the following  but to no avail       myimage   click function   return false

User · Answer

In case  on   method was previously used with particular selector  like in the following example      body   on  click     dynamicTarget   function             Code goes here       Both unbind   and  off   methods are not going to work   However   undelegate   method could be used to completely remove handler from the event for all elements which match the current selector      body   undelegate   dynamicTarget    click

User · Answer

Best way to remove inline onclick event is   element  prop  onclick   null

User · Answer

This can be done by using the unbind function        myimage   unbind  click      You can add multiple event handlers to the same object and event in jquery  This means adding a new one doesn t replace the old ones   There are several strategies for changing event handlers  such as event namespaces  There are some pages about this in the online docs    Look at this question  that s how I learned of unbind   There is some useful description of these strategies in the answers   How to read bound hover callback functions in jquery

User · Answer

jQuery   1 7  With jQuery 1 7 onward the event API has been updated   bind    unbind   are still available for backwards compatibility  but the preferred method is using the on   off   functions  The below would now be       myimage   click function     return false         Adds another click event     myimage   off  click        myimage   on  click mynamespace   function        Do stuff            myimage   off  click mynamespace        jQuery  lt  1 7  In your example code you are simply adding another click event to the image  not overriding the previous one       myimage   click function     return false         Adds another click event   Both click events will then get fired   As people have said you can use unbind to remove all click events       myimage   unbind  click      If you want to add a single event and then remove it  without removing any others that might have been added  then you can use event namespacing       myimage   bind  click mynamespace   function        Do stuff          and to remove just your event       myimage   unbind  click mynamespace

User · Answer

If you use   document  on   to add a listener to a dynamically created element then you may have to use the following to remove it      add the listener   document  on  click    element  function           stuff         remove the listener   document  off  click     element

User · Answer

maybe the unbind method will work for you      myimage   unbind  click

User · Answer

jQuery   1 7  With jQuery 1 7 onward the event API has been updated   bind    unbind   are still available for backwards compatibility  but the preferred method is using the on   off   functions  The below would now be       myimage   click function     return false         Adds another click event     myimage   off  click        myimage   on  click mynamespace   function        Do stuff            myimage   off  click mynamespace        jQuery  lt  1 7  In your example code you are simply adding another click event to the image  not overriding the previous one       myimage   click function     return false         Adds another click event   Both click events will then get fired   As people have said you can use unbind to remove all click events       myimage   unbind  click      If you want to add a single event and then remove it  without removing any others that might have been added  then you can use event namespacing       myimage   bind  click mynamespace   function        Do stuff          and to remove just your event       myimage   unbind  click mynamespace

User · Answer

This can be done by using the unbind function        myimage   unbind  click      You can add multiple event handlers to the same object and event in jquery  This means adding a new one doesn t replace the old ones   There are several strategies for changing event handlers  such as event namespaces  There are some pages about this in the online docs    Look at this question  that s how I learned of unbind   There is some useful description of these strategies in the answers   How to read bound hover callback functions in jquery

User · Answer

You may be adding the onclick handler as inline markup    lt input id  addreport  type  button  value  Add New Report  onclick  openAdd      gt    If so  the jquery  off   or  unbind   won t work  You need to add the original event handler in jquery as well       addreport   on  click       function  e       openAdd          Then the jquery has a reference to the event handler and can remove it       addreport   off  click     VoidKing mentions this a little more obliquely in a comment above

User · Answer

If you want to respond to an event just one time  the following syntax should be really helpful        myLink   bind  click   function          do some things       this  unbind  click   arguments callee     unbind  just this handler         Using arguments callee  we can ensure that the one specific anonymous-function handler is removed  and thus  have a single time handler for a given event   Hope this helps others

User · Answer

All the approaches described did not work for me because I was adding the click event with on   to the document where the element was created at run-time     document  on  click     button   function         doSomething          My workaround    As I could not unbind the   button  class I just assigned another class to the button that had the same CSS styles  By doing so the live on-event-handler ignored the click finally       prevent another click on the button by assigning another class     button   attr  class   buttonOff      Hope that helps

User · Answer

maybe the unbind method will work for you      myimage   unbind  click

User · Answer

This also works fine  Simple and easy see http   jsfiddle net uZc8w 570       myimage   removeAttr  click

User · Answer

if you set the onclick via html you need to removeAttr    this  removeAttr  onclick     if you set it via jquery  as the after the first click in my examples above  then you need to unbind   this  unbind  click

User · Answer

This can be done by using the unbind function        myimage   unbind  click      You can add multiple event handlers to the same object and event in jquery  This means adding a new one doesn t replace the old ones   There are several strategies for changing event handlers  such as event namespaces  There are some pages about this in the online docs    Look at this question  that s how I learned of unbind   There is some useful description of these strategies in the answers   How to read bound hover callback functions in jquery

User · Answer

I know this comes in late  but why not use plain JS to remove the event   var myElement   document getElementById  your ID    myElement onclick   null    or  if you use a named function as an event handler   function eh event       var myElement   document getElementById  your ID    myElement addEventListener  click  eh      add event handler myElement removeEventListener  click  eh     remove it

User · Answer

In case  on   method was previously used with particular selector  like in the following example      body   on  click     dynamicTarget   function             Code goes here       Both unbind   and  off   methods are not going to work   However   undelegate   method could be used to completely remove handler from the event for all elements which match the current selector      body   undelegate   dynamicTarget    click

User · Answer

Thanks for the information  very helpful i used it for locking page interaction while in edit mode by another user   I used it in conjunction with ajaxComplete   Not necesarily the same behavior but somewhat similar   function userPageLock           body   bind  ajaxComplete lockpage   function               body   unbind  ajaxComplete lockpage            executePageLock                        function executePageLock          do something

User · Answer

You may be adding the onclick handler as inline markup    lt input id  addreport  type  button  value  Add New Report  onclick  openAdd      gt    If so  the jquery  off   or  unbind   won t work  You need to add the original event handler in jquery as well       addreport   on  click       function  e       openAdd          Then the jquery has a reference to the event handler and can remove it       addreport   off  click     VoidKing mentions this a little more obliquely in a comment above

User · Answer

If event is attached this way  and the target is to be unattached       container   on  click   span  function eo       alert 1          this  off      seams easy  but does not work          container   off  click   span      clears click event for every span        this  on  click  function   return false       this works

User · Answer

To remove ALL event-handlers  this is what worked for me   To remove all event handlers mean to have the plain HTML structure without all the event handlers attached to the element and its child nodes   To do this  jQuery s clone   helped   var original  clone     element with id my-div and its child nodes have some event-handlers original       my-div    clone   original clone       original replaceWith clone     With this  we ll have the clone in place of the original with no event-handlers on it   Good Luck

User · Answer

jQuery   1 7  With jQuery 1 7 onward the event API has been updated   bind    unbind   are still available for backwards compatibility  but the preferred method is using the on   off   functions  The below would now be       myimage   click function     return false         Adds another click event     myimage   off  click        myimage   on  click mynamespace   function        Do stuff            myimage   off  click mynamespace        jQuery  lt  1 7  In your example code you are simply adding another click event to the image  not overriding the previous one       myimage   click function     return false         Adds another click event   Both click events will then get fired   As people have said you can use unbind to remove all click events       myimage   unbind  click      If you want to add a single event and then remove it  without removing any others that might have been added  then you can use event namespacing       myimage   bind  click mynamespace   function        Do stuff          and to remove just your event       myimage   unbind  click mynamespace

User · Answer

if you set the onclick via html you need to removeAttr    this  removeAttr  onclick     if you set it via jquery  as the after the first click in my examples above  then you need to unbind   this  unbind  click

User · Answer

This wasn t available when this question was answered  but you can also use the live   method to enable disable events       myimage not  disabled    live  click   myclickevent        mydisablebutton   click  function          myimage   addClass  disabled          What will happen with this code is that when you click  mydisablebutton  it will add the class disabled to the  myimage element  This will make it so that the selector no longer matches the element and the event will not be fired until the  disabled  class is removed making the  live   selector valid again   This has other benefits by adding styling based on that class as well

User · Answer

Just Simply remove that from button       classname   click function         classname    remove

User · Answer

All the approaches described did not work for me because I was adding the click event with on   to the document where the element was created at run-time     document  on  click     button   function         doSomething          My workaround    As I could not unbind the   button  class I just assigned another class to the button that had the same CSS styles  By doing so the live on-event-handler ignored the click finally       prevent another click on the button by assigning another class     button   attr  class   buttonOff      Hope that helps

User · Answer

Updated for 2014  Using the latest version of jQuery  you re now able to unbind all events on a namespace by simply doing      foo    off    myNamespace

User · Answer

I had to set the event to null using the prop and the attr   I couldn t do it with one or the other   I also could not get  unbind to work   I am working on a TD element    prop  onclick   null  attr  onclick   null

User · Answer

I know this comes in late  but why not use plain JS to remove the event   var myElement   document getElementById  your ID    myElement onclick   null    or  if you use a named function as an event handler   function eh event       var myElement   document getElementById  your ID    myElement addEventListener  click  eh      add event handler myElement removeEventListener  click  eh     remove it

User · Answer

This wasn t available when this question was answered  but you can also use the live   method to enable disable events       myimage not  disabled    live  click   myclickevent        mydisablebutton   click  function          myimage   addClass  disabled          What will happen with this code is that when you click  mydisablebutton  it will add the class disabled to the  myimage element  This will make it so that the selector no longer matches the element and the event will not be fired until the  disabled  class is removed making the  live   selector valid again   This has other benefits by adding styling based on that class as well

User · Answer

This can be done by using the unbind function        myimage   unbind  click      You can add multiple event handlers to the same object and event in jquery  This means adding a new one doesn t replace the old ones   There are several strategies for changing event handlers  such as event namespaces  There are some pages about this in the online docs    Look at this question  that s how I learned of unbind   There is some useful description of these strategies in the answers   How to read bound hover callback functions in jquery

User · Answer

maybe the unbind method will work for you      myimage   unbind  click

User · Answer

If you want to respond to an event just one time  the following syntax should be really helpful        myLink   bind  click   function          do some things       this  unbind  click   arguments callee     unbind  just this handler         Using arguments callee  we can ensure that the one specific anonymous-function handler is removed  and thus  have a single time handler for a given event   Hope this helps others

User · Answer

If event is attached this way  and the target is to be unattached       container   on  click   span  function eo       alert 1          this  off      seams easy  but does not work          container   off  click   span      clears click event for every span        this  on  click  function   return false       this works

User · Answer

maybe the unbind method will work for you      myimage   unbind  click

User · Answer

Hope my below code explains all  HTML    x000D   x000D   function     x000D   x000D           btn add   on  click  function    x000D             btn click   on  click  added handler   x000D         alert  Added new handler to button 1    x000D           x000D   x000D     x000D    x000D           btn remove   on  click  function    x000D             btn click   off  click  added handler   x000D         alert  Removed new handler to button 1    x000D           x000D   x000D     x000D     function fixed handler    x000D      alert  Fixed handler    x000D      x000D     x000D     function added handler    x000D      alert  new handler    x000D      x000D     x000D        btn click   on  click  fixed handler   x000D        btn fixed   on  click  fixed handler   x000D     x000D     x000D     jQuery   x000D   lt script src  https   ajax googleapis com ajax libs jquery 2 1 1 jquery min js  gt  lt  script gt  x000D   lt button id  btn click  gt Button 1 lt  button gt  x000D     lt button id  btn add  gt Add Handler lt  button gt  x000D     lt button id  btn remove  gt Remove Handler lt  button gt  x000D     lt button id  btn fixed  gt Fixed Handler lt  button gt  x000D   x000D   x000D

User · Answer

Just Simply remove that from button       classname   click function         classname    remove

User · Answer

This also works fine  Simple and easy see http   jsfiddle net uZc8w 570       myimage   removeAttr  click

User · Answer

Updated for 2014  Using the latest version of jQuery  you re now able to unbind all events on a namespace by simply doing      foo    off    myNamespace

User · Answer

jQuery   1 7  With jQuery 1 7 onward the event API has been updated   bind    unbind   are still available for backwards compatibility  but the preferred method is using the on   off   functions  The below would now be       myimage   click function     return false         Adds another click event     myimage   off  click        myimage   on  click mynamespace   function        Do stuff            myimage   off  click mynamespace        jQuery  lt  1 7  In your example code you are simply adding another click event to the image  not overriding the previous one       myimage   click function     return false         Adds another click event   Both click events will then get fired   As people have said you can use unbind to remove all click events       myimage   unbind  click      If you want to add a single event and then remove it  without removing any others that might have been added  then you can use event namespacing       myimage   bind  click mynamespace   function        Do stuff          and to remove just your event       myimage   unbind  click mynamespace

User · Answer

To remove ALL event-handlers  this is what worked for me   To remove all event handlers mean to have the plain HTML structure without all the event handlers attached to the element and its child nodes   To do this  jQuery s clone   helped   var original  clone     element with id my-div and its child nodes have some event-handlers original       my-div    clone   original clone       original replaceWith clone     With this  we ll have the clone in place of the original with no event-handlers on it   Good Luck

User · Answer

I had to set the event to null using the prop and the attr   I couldn t do it with one or the other   I also could not get  unbind to work   I am working on a TD element    prop  onclick   null  attr  onclick   null

User · Answer

Best way to remove inline onclick event is   element  prop  onclick   null

User · Answer

If you use   document  on   to add a listener to a dynamically created element then you may have to use the following to remove it      add the listener   document  on  click    element  function           stuff         remove the listener   document  off  click     element

User · Answer

Thanks for the information  very helpful i used it for locking page interaction while in edit mode by another user   I used it in conjunction with ajaxComplete   Not necesarily the same behavior but somewhat similar   function userPageLock           body   bind  ajaxComplete lockpage   function               body   unbind  ajaxComplete lockpage            executePageLock                        function executePageLock          do something

User · Answer

Hope my below code explains all  HTML    x000D   x000D   function     x000D   x000D           btn add   on  click  function    x000D             btn click   on  click  added handler   x000D         alert  Added new handler to button 1    x000D           x000D   x000D     x000D    x000D           btn remove   on  click  function    x000D             btn click   off  click  added handler   x000D         alert  Removed new handler to button 1    x000D           x000D   x000D     x000D     function fixed handler    x000D      alert  Fixed handler    x000D      x000D     x000D     function added handler    x000D      alert  new handler    x000D      x000D     x000D        btn click   on  click  fixed handler   x000D        btn fixed   on  click  fixed handler   x000D     x000D     x000D     jQuery   x000D   lt script src  https   ajax googleapis com ajax libs jquery 2 1 1 jquery min js  gt  lt  script gt  x000D   lt button id  btn click  gt Button 1 lt  button gt  x000D     lt button id  btn add  gt Add Handler lt  button gt  x000D     lt button id  btn remove  gt Remove Handler lt  button gt  x000D     lt button id  btn fixed  gt Fixed Handler lt  button gt  x000D   x000D   x000D

[jquery] Best way to remove an event handler in jQuery?

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