How can I check if a checkbox is checked

Question

I am building a mobile web app with jQuery Mobile and I want to check if a checkbox is checked  Here is my code    lt script type text javascript gt    function validate        if  remember checked    1         alert  checked           else         alert  You didn t check it  Let me check it for you               lt  script gt    lt input id  remember  name  remember  type  checkbox  onclick  validate      gt    But for some reason or another it doesn t execute it   Please help    ----EDIT----- This is what I have for the moment    lt DIV data-role  content  data-theme  g  gt       lt DIV class ui-grid-g-login gt           lt FORM method post action    PROBE 266    data-theme  C  gt               lt P gt  DATA ERROR  lt  P gt               lt div id  mail  data-role  fieldcontain  gt                   lt label for  mail  gt Email   lt  label gt                          lt input id  mail  name  mail  type  email    gt               lt  div gt               lt div id  pass  data-role  fieldcontain  gt                   lt label for  pass  gt Paswoord   lt  label gt                           lt input id  pass  name  pass  type  password    gt               lt  div gt               lt div id  remember  data-role  fieldcontain  gt                   lt label for  remember  gt Onthoud mij lt  label gt                          lt input id  remember  name  remember  type  checkbox  onclick  validate      gt               lt  div gt               lt P gt  lt INPUT class btn name submit value Login type submit  onclick  validate    gt  lt  P gt             lt  FORM gt       lt  DIV gt   lt  DIV gt  lt  --  content -- gt    lt script type text javascript gt  function validate        var remember   document getElementById  remember        if  remember checked           alert  checked          else          alert  You didn t check it  Let me check it for you             lt  script gt    ----EDIT--  Solved it  the problem was that the fieldcontain was also named  remember

User · Answer

This should allow you to check if element with id  remember  is  checked   if  document getElementById  remember   is   checked

User · Answer

use like this   lt script type text javascript gt  function validate    if  document getElementById  remember   checked             alert  checked      else  alert  You didn t check it  Let me check it for you         lt  script gt    lt input id  remember  name  remember  type  checkbox  onclick  validate      gt

User · Answer

Use this below simple code  https   jsfiddle net Divyesh Patel v7a4h3kr 7    x000D   x000D   lt input type  checkbox  id  check  gt  x000D   lt a href     onclick  check    gt click lt  a gt  x000D   lt button onclick  check    gt button lt  button gt  x000D   lt script gt  x000D   function check     x000D        if  document getElementById  check   checked    x000D              alert  checked    x000D            else   x000D              alert  Not checked     x000D            x000D          x000D        x000D   x000D   lt  script gt  x000D   x000D   x000D

User · Answer

Try this   function validate       var remember   document getElementById  remember      if  remember checked        alert  checked        else       alert  You didn t check it  Let me check it for you             Your script doesn t know what the variable remember is  You need to get the element first using getElementById

User · Answer

remember is undefined     and the checked property is a boolean not a number   function validate        var remember   document getElementById  remember        if  remember checked           alert  checked          else          alert  You didn t check it  Let me check it for you

User · Answer

You can also use JQuery methods to accomplish this    lt script type  text javascript  gt  if      remember   0  checked      alert  checked       lt  script gt

User · Answer

This should work      function validate             if      remeber   is   checked                  alert  checked              else               alert  You didn t check it  Let me check it for you

User · Answer

I am using this and it works for me with Jquery   Jquery   var checkbox       name  remember       if  checkbox is   checked          console log  The checkbox is checked     else       console log  The checkbox is not checked        Is very simple  but work s   Regards

User · Answer

Use this below simple code  https   jsfiddle net Divyesh Patel v7a4h3kr 7    x000D   x000D   lt input type  checkbox  id  check  gt  x000D   lt a href     onclick  check    gt click lt  a gt  x000D   lt button onclick  check    gt  x000D  button x000D   lt  button gt  x000D   lt script gt  x000D   function check     x000D        if  document getElementById  check   checked    x000D              alert  checked    x000D            else   x000D              alert  You didn t check it  Let me check it for you     x000D            x000D          x000D        x000D   x000D   lt  script gt  x000D   x000D   x000D

User · Answer

checked is boolean property so you can directly use it in IF condition -    lt script type  text javascript  gt      function validate             if  document getElementById  remember   checked                alert  checked              else               alert  You didn t check it  Let me check it for you                          lt  script gt

User · Answer

if  document getElementById  remember   checked            alert  checked              else           alert  You didn t check it  Let me check it for you

User · Answer

Try This   lt script type  text javascript  gt  window onload   function          var input   document querySelector  input type checkbox          function check             if  input checked                alert  checked              else               alert  You didn t check it                         input onchange   check      check       lt  script gt

User · Answer

If you are using this form for mobile app then you may use the required attribute html5   you dont want to use any java script validation for this  It should work   lt input id  remember  name  remember  type  checkbox  required  required    gt

User · Answer

You can try this   if     remember  is   checked        alert  checked     else     alert  not checked

[javascript] How can I check if a checkbox is checked?

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