Problem with "this" keyword in event handler of body element

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  • szimek
    #1

    Problem with "this" keyword in event handler of body element

    Hi,

    I've got this very simple code:

    <body onclick="foo(ev ent, this)">

    Inside foo method in IE "this" is body object, but in FF it's window
    object - at least that's what MS Script Editor and Firebug are saying.
    Any ideas why it works like that?
    Tags: None
    • RobG
      #2
      Re: Problem with &quot;this&quot ; keyword in event handler of body element

      szimek wrote:
      >> On 12 Lut, 12:04, szimek <szi...@gmail.c omwrote:
      >> >
      >> Hi,
      >> >
      >> I've got this very simple code:
      >> >
      >> <body onclick="foo(ev ent, this)">
      >> >
      >> Inside foo method in IE "this" is body object, but in FF it's window
      >> object - at least that's what MS Script Editor and Firebug are saying.
      [...]
      >
      I wrote this simple test page:
      <html>
      <body onclick="foo(th is);">
      <h1 onclick="foo(th is);">Test</h1>
      <script>
      function foo(element) {
      alert(element.t agName);
      }
      </script>
      </body>
      </html>
      >
      I tested it with FF 2.0.0.12 and 1.5.0.12 and both browsers give "H1"
      correctly when clicking on the header and "undefined" (window object)
      when clicking on the body. IE and Opera 9.23 work correctly giving
      "BODY" in the second case. Is it supposed to work like this or is it
      some long standing FF bug?
      Weird, I don't remember coming across that before, it seems like a bug
      in Firefox to me. I'll check Bugzilla later if I have time.



      --
      Rob
      "We shall not cease from exploration, and the end of all our
      exploring will be to arrive where we started and know the
      place for the first time." -- T. S. Eliot

        Comment

        • dhtml
          #3
          Re: Problem with &quot;this&quot ; keyword in event handler of body element

          On Feb 12, 1:04 pm, RobG <rg...@iinet.ne t.auwrote:
          szimek wrote:
          > On 12 Lut, 12:04, szimek <szi...@gmail.c omwrote:
          >
          > Hi,
          >
          > I've got this very simple code:
          >
          > <body onclick="foo(ev ent, this)">
          >
          > Inside foo method in IE "this" is body object, but in FF it's window
          > object - at least that's what MS Script Editor and Firebug are saying.
          [...]
          >
          I wrote this simple test page:
          <html>
          <body onclick="foo(th is);">
          <h1 onclick="foo(th is);">Test</h1>
          <script>
          function foo(element) {
          alert(element.t agName);
          }
          </script>
          </body>
          </html>
          >
          I tested it with FF 2.0.0.12 and 1.5.0.12 and both browsers give "H1"
          correctly when clicking on the header and "undefined" (window object)
          when clicking on the body. IE and Opera 9.23 work correctly giving
          "BODY" in the second case. Is it supposed to work like this or is it
          some long standing FF bug?
          >
          Weird, I don't remember coming across that before, it seems like a bug
          in Firefox to me. I'll check Bugzilla later if I have time.
          >
          It is a bug. I could not find a bug rep't.
          --
          Rob
          "We shall not cease from exploration, and the end of all our
          exploring will be to arrive where we started and know the
          place for the first time." -- T. S. Eliot

            Comment

            • RobG
              #4
              Re: Problem with &quot;this&quot ; keyword in event handler of body element

              On Feb 13, 4:14 pm, dhtml <dhtmlkitc...@g mail.comwrote:
              On Feb 12, 1:04 pm, RobG <rg...@iinet.ne t.auwrote:
              >
              szimek wrote:
              >> On 12 Lut, 12:04, szimek <szi...@gmail.c omwrote:
              >
              >> Hi,
              >
              >> I've got this very simple code:
              >
              >> <body onclick="foo(ev ent, this)">
              >
              >> Inside foo method in IE "this" is body object, but in FF it's window
              >> object - at least that's what MS Script Editor and Firebug are saying.
              [...]
              >
              I wrote this simple test page:
              <html>
              <body onclick="foo(th is);">
              <h1 onclick="foo(th is);">Test</h1>
              <script>
              function foo(element) {
              alert(element.t agName);
              }
              </script>
              </body>
              </html>
              >
              I tested it with FF 2.0.0.12 and 1.5.0.12 and both browsers give "H1"
              correctly when clicking on the header and "undefined" (window object)
              when clicking on the body. IE and Opera 9.23 work correctly giving
              "BODY" in the second case. Is it supposed to work like this or is it
              some long standing FF bug?
              >
              Weird, I don't remember coming across that before, it seems like a bug
              in Firefox to me. I'll check Bugzilla later if I have time.
              >
              It is a bug. I could not find a bug rep't.
              szimek seems to have reported it in Bugzilla ID #417080. I gave it a
              vote. :-)


              --
              Rob


                Comment

                • VK
                  #5
                  Re: Problem with &quot;this&quot ; keyword in event handler of body element

                  On Feb 13, 9:48 am, RobG <rg...@iinet.ne t.auwrote:
                  On Feb 13, 4:14 pm, dhtml <dhtmlkitc...@g mail.comwrote:
                  >
                  >
                  >
                  On Feb 12, 1:04 pm, RobG <rg...@iinet.ne t.auwrote:
                  >
                  szimek wrote:
                  > On 12 Lut, 12:04, szimek <szi...@gmail.c omwrote:
                  >
                  > Hi,
                  >
                  > I've got this very simple code:
                  >
                  > <body onclick="foo(ev ent, this)">
                  >
                  > Inside foo method in IE "this" is body object, but in FF it's window
                  > object - at least that's what MS Script Editor and Firebug are saying.
                  [...]
                  >
                  I wrote this simple test page:
                  <html>
                  <body onclick="foo(th is);">
                  <h1 onclick="foo(th is);">Test</h1>
                  <script>
                  function foo(element) {
                  alert(element.t agName);
                  }
                  </script>
                  </body>
                  </html>
                  >
                  I tested it with FF 2.0.0.12 and 1.5.0.12 and both browsers give "H1"
                  correctly when clicking on the header and "undefined" (window object)
                  when clicking on the body. IE and Opera 9.23 work correctly giving
                  "BODY" in the second case. Is it supposed to work like this or is it
                  some long standing FF bug?
                  >
                  Weird, I don't remember coming across that before, it seems like a bug
                  in Firefox to me. I'll check Bugzilla later if I have time.
                  >
                  It is a bug. I could not find a bug rep't.
                  >
                  szimek seems to have reported it in Bugzilla ID #417080. I gave it a
                  vote. :-)
                  I left my comment with the explanation of the phenomenon and voted NO.
                  I believe Gecko behavior is fully consistent here with DOM 0.

                    Comment

                    • RobG
                      #6
                      Re: Problem with &quot;this&quot ; keyword in event handler of body element

                      On Feb 14, 8:17 am, VK <schools_r...@y ahoo.comwrote:
                      [...]
                      I left my comment with the explanation of the phenomenon and voted NO.
                      I believe Gecko behavior is fully consistent here with DOM 0.
                      I think your logic is flawed, DOM 0 is not a specifictation, your
                      reference to the onload attribute is a red herring. The body element
                      is not the window object.

                      The body element is defined in the HTML specification, it has an
                      onclick attribute as do most other elements. Its behaviour in the DOM
                      should be implemented exactly the same way as it is implemented on all
                      other elements that have it, and as all other 'on' events are
                      implemented.


                      --
                      Rob

                        Comment

                        • Thomas 'PointedEars' Lahn
                          #7
                          Re: Problem with &quot;this&quot ; keyword in event handler of body element

                          VK wrote:
                          On Feb 13, 9:48 am, RobG <rg...@iinet.ne t.auwrote:
                          >On Feb 13, 4:14 pm, dhtml <dhtmlkitc...@g mail.comwrote:
                          >>It is a bug. I could not find a bug rep't.
                          >szimek seems to have reported it in Bugzilla ID #417080. I gave it a
                          >vote. :-)
                          >
                          I left my comment with the explanation of the phenomenon and voted NO.
                          You have not even understood that it is not possible to vote NO on Bugzilla.
                          I believe Gecko behavior is fully consistent here with DOM 0.
                          I agree with RobG here, see my comment.


                          PointedEars

                            Comment

                            • Thomas 'PointedEars' Lahn
                              #8
                              Re: Problem with &quot;this&quot ; keyword in event handler of body element

                              RobG wrote:
                              On Feb 14, 8:17 am, VK <schools_r...@y ahoo.comwrote:
                              >I left my comment with the explanation of the phenomenon and voted NO.
                              >I believe Gecko behavior is fully consistent here with DOM 0.
                              >
                              I think your logic is flawed, DOM 0 is not a specifictation, your
                              reference to the onload attribute is a red herring.
                              He ridiculously referred to the `onload' *property*, _not_ attribute.

                              Otherwise, full ACK.


                              PointedEars
                              --
                              var bugRiddenCrashP ronePieceOfJunk = (
                              navigator.userA gent.indexOf('M SIE 5') != -1
                              && navigator.userA gent.indexOf('M ac') != -1
                              ) // Plone, register_functi on.js:16

                                Comment

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