Disable pasting text into HTML form

Question

Is there a way using JavaScript to disable the ability to paste text into a text field on an HTML form   E g  I have a simple registration form where the user is required to input their email twice  The second email entry is to verify there are no typos in the first email entry  However if the user copy pastes their email then that defeats the purpose and I ve been experiencing users having problems because they ve input the wrong email and copy pasted it   Maybe I wasn t clear on my question but I am not trying to prevent people from copying  or drag selecting  text on their browser  I just want to stop them from pasting input into a text field to minimize user error   Perhaps instead of using this  hack  you can suggest another solution to the core problem of what I m trying to solve here  I ve done less than half a dozen user tests and this has already happened twice  My audience does not have a high level of computer proficiency

User · Answer

I use this vanilla JS solution   const element   document getElementById  textfield   element addEventListener  paste   e   gt   e preventDefault

User · Answer

You can      but don t   You should not be altering the default behaviour of a users browser   It really is bad usability for your web application   Also if a user wants to disable this hack then they can just disable javascript on their browser   Just add these attributes to the textbox  ondragstart    return false    onselectstart    return false

User · Answer

You could attach a  keydown  listener to the input box to detect whether or not the Ctrl   V keys are being pressed and  if so  stop the event or set the input box s value to      That wouldn t handle right clicking and pasting or pasting from the Edit menu of the browser  though  You may need to add a  last length  counter to the keydown listener and use an interval to check the field s current length to see if it increase since the last keystroke   Neither is recommended  though  Form fields with paste disabled are extremely frustrating  I m capable of typing my email correctly the first time  so I reserve the right to paste it into the second box

User · Answer

from  Some may suggest using Javascript to capture the users  actions  like right-clicking the mouse or the Ctrl C   Ctrl V key combinations and then stopping the operation  But this is obviously not the best or simplest solution  The solution is integrated in the input field properties itself together with some event capturing using Javascript   In order to disabled the browsers  autocomplete  simply add the attribute to the input field  It should look something like this    lt input type  text  autocomplete  off  gt    And if you want to deny Copy and Paste for that field  simply add the Javascript event capturing calls oncopy  onpaste  and oncut and make them return false  like so    lt input type  text  oncopy  return false   onpaste  return false   oncut  return false   gt    The next step is using onselectstart to deny the input field s content selection from the user  but be warned  this only works for Internet Explorer  The rest of the above work great on all the major browsers  Internet Explorer  Mozilla Firefox  Apple Safari  on Windows OS  at least  and Google Chrome

User · Answer

Hope below code will work     lt  --Disable Copy And Paste-- gt   lt script language  JavaScript1 2  gt  function disableselect e   return false   function reEnable    return true   document onselectstart new Function   return false   if  window sidebar   document onmousedown disableselect document onclick reEnable    lt  script gt

User · Answer

The way that I would resolve the issue of confirming an email address is as follows    Before going through the main process - say registering the user - first ask them to enter their email address  Generate a unique code and send it to that email address  If user has entered the correct email address  they will get the code  User must enter that code along with their email address  and their other required information  so they can complete the registration  - Please note that if this time they enter a wrong email address  or a wrong code   because it will not match with the code  the registration will not go through  and the user will be informed right away  If the email address  the code  and other registration information have been entered correctly  the registration is complete and user can start using the system immediately  - no need to to respond to any other email address in order to activate their account   For better security  the code should have a limited lifetime  and it should be allowed only once in the registration process  Also  in order to prevent any malicious robot applications  it is better to accompany the first step with captcha or a similar mechanism

User · Answer

Crazy idea  Require the user to send you an email as part of the signup process  This would obviously be inconvenient when clicking on a mailto link doesn t work  if they re using webmail  for example   but I see it as a way to simultaneously guarantee against typos and confirm the email address   It would go like this  They fill out most of the form  entering their name  password  and whatnot  When they push submit  they re actually clicking a link to send mail to your server  You ve already saved their other information  so the message just includes a token saying which account this is for

User · Answer

How about sending a confirmation email to the email address that the user has just entered twice in which there is a link to a confirmation URL on your site  then you know that they have got the message   Anyone that doesn t click to confirm the receipt of the email may have entered their email address incorrectly   Not a perfect solution  but just some ideas

User · Answer

Just got this  we can achieve it using onpaste  return false   thanks to  http   sumtips com 2011 11 prevent-copy-cut-paste-text-field html  We have various other options available as listed below    lt input type  text  onselectstart  return false  onpaste  return false   onCopy  return false  onCut  return false  onDrag  return false  onDrop  return false  autocomplete off  gt  lt br gt

User · Answer

With Jquery you can do this with one simple codeline   HTML    lt input id  email  name  email  gt    Code     email  on  paste   false     JSfiddle  https   jsfiddle net ZjR9P 2

User · Answer

Don t do it  Don t mess with the user s browser  By Copy   Pasting into an E-Mail confirmation field  the user accepts responsibility over what they type  If they are dumb enough to copy   paste a faulty address  it has happened to me  then it s their own damn fault   If you want to make sure that the E-Mail confirmation works out  have the user check their E-Mail while your site waits   Please open your webmail program in a new window    Show the E-Mail address in big fat letters   The confirmation E-Mail was sent to     made an error  CLick here to change     Even better  if you can  let the user have some kind of limited access without confirming  That way  they can log in straight away and you improve your chances to keep in touch with the visitor even if the confirmation mail is blocked due to other reasons  e g  spam filters

User · Answer

Add a class of  disablecopypaste  to the inputs you want to disable the copy paste functionality on and add this jQuery script      document  ready function             input disablecopypaste   bind  copy paste   function  e           e preventDefault

User · Answer

what about using CSS on UIWebView  something like    lt style type  text css  gt   lt     -                 -webkit-user-select  none        -- gt   lt  style gt    also you can read detail about block copy-paste using CSS http   rakaz nl 2009 09 iphone-webapps-101-getting-safari-out-of-the-way html

User · Answer

if you have to use 2 email fields and are concerned about the user incorrectly pasting the same mistyped email from field 1 to field 2 then i d say show an alert  or something more subtle  if the user pastes something into the second email field  document querySelector  input email-confirm   onpaste   function e        alert  Are you sure the email you  ve entered is correct         this way you don t disable paste  you just give them a friendly reminder to check what they ve presumably typed in the first field and then pasted to the second field is correct   however  perhaps a single email field with autocomplete on is all that s needed  chances are they ve filled their email in correctly before on another site at some point and the browser will suggest to fill the field with that email   lt input type  email  name  email  required autocomplete  email  gt

User · Answer

Extending  boycs answer  I would recommend also using  on       body   on  copy paste    input   function  e    e preventDefault

User · Answer

Simple solution  just reverse the registration process  instead of requiring confirmation at the end of registration process  request confirmation at the beginning of it  I e  the registration process started with a simple form asking for e-mail address and nothing else  Upon submitting  an e-mail with link to a confirmation page unique to the e-mail address sent out  The user go to that page  then the rest of information for the registration  user name  full name  etc   will be requested   This is simple since the website does not even need to store anything before confirmation  the e-mail address can be encrypted with a key and attached as part of the confirmation page address

User · Answer

I recently had to begrudgingly disable pasting in a form element  To do so  I wrote a cross-browser  implementation of Internet Explorer s  and others   onpaste event handler  My solution had to be independent of any third-party JavaScript libraries   Here s what I came up with  It doesn t completely disable pasting  the user can paste a single character at a time  for example   but it meets my needs and avoids having to deal with keyCodes  etc      Register onpaste on inputs and textareas in browsers that don t    natively support it   function          var onload   window onload       window onload   function              if  typeof onload     function                 onload apply this  arguments                      var fields               var inputs   document getElementsByTagName  input            var textareas   document getElementsByTagName  textarea             for  var i   0  i  lt  inputs length  i                  fields push inputs i                       for  var i   0  i  lt  textareas length  i                  fields push textareas i                       for  var i   0  i  lt  fields length  i                  var field   fields i                if  typeof field onpaste     function   amp  amp    field getAttribute  onpaste                      field onpaste   eval   function          field getAttribute  onpaste                                        if  typeof field onpaste     function                     var oninput   field oninput                   field oninput   function                          if  typeof oninput     function                             oninput apply this  arguments                                              if  typeof this previousValue     undefined                             this previousValue   this value                                             var pasted    Math abs this previousValue length - this value length   gt  1  amp  amp  this value                              if  pasted  amp  amp   this onpaste apply this  arguments                             this value   this previousValue                                             this previousValue   this value                                      if  field addEventListener                        field addEventListener  input   field oninput  false                     else if  field attachEvent                        field attachEvent  oninput   field oninput                                                           To make use of this in order to disable pasting    lt input type  text  onpaste  return false     gt        I know oninput isn t part of the W3C DOM spec  but all of the browsers I ve tested this code with mdash Chrome 2  Safari 4  Firefox 3  Opera 10  IE6  IE7 mdash support either oninput or onpaste  Out of all these browsers  only Opera doesn t support onpaste  but it does support oninput   Note  This won t work on a console or other system that uses an on-screen keyboard  assuming the on-screen keyboard doesn t send keys to the browser when each key is selected   If it s possible your page app could be used by someone with an on-screen keyboard and Opera  e g   Nintendo Wii  some mobile phones   don t use this script unless you ve tested to make sure the on-screen keyboard sends keys to the browser after each key selection

User · Answer

Check validity of the MX record of the host of the given email  This can eliminate errors to the right of the   sign   You could do this with an AJAX call before submit and or server side after the form is submitted

User · Answer

I did something similar to this for http   bookmarkchamp com - there I wanted to detect when a user copied something into an HTML field  The implementation I came up with was to check the field constantly to see if at any time there was suddenly a whole lot of text in there   In other words  if once milisecond ago there was no text  and now there are more than 5 chars    then the user probably pasted something in the field   If you want to see this working in Bookmarkchamp  you need to be registered   paste a URL into the URL field  or drag and drop a URL in there

User · Answer

Add a second step to your registration process  First page as usual  but on reload  display a second page and ask the email again  If it s that important  the user can handle it

User · Answer

Using jquery  you can avoid copy paste and cut using this      textboxClass   on  copy paste cut   function e        e preventDefault

User · Answer

You can disable the copy paste option with jQuery by the below script  jQuery  quot input quot   attr  quot onpaste quot   quot return false  quot     of by using the bellow oppaste attribute into the input fields  onpaste  quot return false  quot

User · Answer

You can use jquery   HTML file   lt input id  email  name  email  gt    jquery code      email   bind  copy paste   function  e            e preventDefault

[javascript] Disable pasting text into HTML form

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