document getElementById id focus is not working for firefox or chrome

Question

When ever I do onchange event  its going inside that function its validating  But focus is not comming I am using document getElementById  controlid   focus     I am using Mozilla Firefox and Google Chrome  in both its not working  I don t want any IE  Can any one tell me what could me the reason   Thanks in advance  Here s the code   var mnumber   document getElementById  mobileno   value   if mnumber length  gt  10        alert  Mobile Number Should be in 10 digits only         document getElementById  mobileno   value            document getElementById  mobileno   focus         return false

User · Answer

For getting back focus to retype password text box in javascript   window setTimeout function     document forms  reg    retypepwd   focus      0     Here  reg is the registration form name

User · Answer

Make sure you use  id  and  getElementById  as shown here    lt FORM id  my form  name  my form  action    gt   lt INPUT TYPE  text  NAME  somefield  ID  somefield  onChange  document getElementById  my form   submit     gt   lt  FORM gt

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The timeout suggested above worked around the issue on Chrome  No issue exists on IE8 or FF3  My code that to set focus that worked is  window setTimeout function       document form1 password focus       0

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Add a control  where you want to set focus then change its property like below   lt asp TextBox ID  txtDummy  runat  server  Text    Width  2  ReadOnly  true  BorderStyle  None  BackColor  Transparent  gt  lt  asp TextBox gt    In the codebehind  just call like below txtDummy Focus    this method is working in all browser

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Your focus is working before return false    After that is not working   You try this solution  Control after return false   Put code in function   function  validateNumber        var mnumber   document getElementById  mobileno   value       if mnumber length  gt  10            alert  Mobile Number Should be in 10 digits only             document getElementById  mobileno   value                return false        else          return true            Caller function   function submitButton            if  validateNumber                 document getElementById  mobileno   focus                return false                HTML   Input  lt input type  text  id  mobileno  gt   lt button onclick  submitButton      gt Submit lt  button gt

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My case was a bit different  I was trying to focus   an input from within a browser developer console  Turns out it was interfering with the input somehow  and once I minimized the console everything worked as expected  I understand this isn t a programmatical solution  but in case someone found this on a search engine jist like I did  there s a chance this information might help

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2 things to mention if focus   not working    use this function after appending to parent if console is selected  after refreshing page  element will not gain focus  so select  click on  the webpage while testing   This way works in both Firefox and Chrome without any setTimeOut

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window setTimeout function           document getElementById  mobileno   focus        0      This worked for me also  Firefox would set the value of my element  but not give focus to it

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I know this may be an esoteric use-case but I struggled with getting an input to take focus when using Angular 2 framework  Calling focus   simply did not work not matter what I did    Ultimately I realized angular was suppressing it because I had not set an   ngModel   on the input  Setting one solved it  Hope it helps someone

User · Answer

Are you trying to reference the element before the DOM has finished loading    Your code should go in body load  or another function that should execute when the DOM has loaded  such as   document  ready   in jQuery   body onload   function             your onchange event handler should be in here too        var mnumber   document getElementById  mobileno   value       if mnumber length  gt  10            alert  Mobile Number Should be in 10 digits only             document getElementById  mobileno   value                document getElementById  mobileno   focus             return false

User · Answer

One more thing to add to this list to check   Make sure the element you are trying to focus is not itself nor is contained in an element with  display  none  at the time you are trying to focus it

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Try location href   yourId  Like this   lt button onclick  quot javascript location href   yourId  quot  gt Show lt  button gt

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Place this source above your modal     lt script gt     body   on  shown bs modal     IdYourModal   function          document getElementById  mobileno   focus        lt  script gt

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One thing to check  that I just found is that it won t work if there are multiple elements with the same ID  It doesn t error if you try to do this  it just fails silently

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Not all elements are focusable but default  there is a tabindex attribute to fix that   When you assign tabindex  to an element   It becomes focusable  A user can use the tab key to move from the element with lesser positive tabindex to the next one  The exception is a special value tabindex  0  means that the element will always be last  The tabindex -1 means that an element becomes focusable  but the tab key will always skip it  Only the focus   method will work

User · Answer

I suspect the reason this works is the browser rendering runs on the same thread as javascript  and setTimeout function     0   queues the javascript function inside setTimeout to execute when the browser becomes idle  If anyone has a more in-depth explanation please share it   setTimeout function      if document getElementById  mobileno       document getElementById  mobileno   focus          0

User · Answer

Try using a timer   var mnumber   document getElementById  mobileno   value  if  mnumber length  gt  10          alert  Mobile Number Should be in 10 digits only        document getElementById  mobileno   value           window setTimeout function                  document getElementById  mobileno   focus           0       return false      A timer with a count of 0 will run when the thread becomes idle   If that doesn t help  try the code  with the timer  in the onblur event instead

[javascript] document.getElementById(id).focus() is not working for firefox or chrome

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