make iframe height dynamic based on content inside- JQUERY Javascript

Question

I am loading an aspx web page in an iframe  The content in the Iframe can be of more height than the iframe s height  The iframe should not have scroll bars   I have a wrapper div tag inside the iframe which basically is all the content   I wrote some jQuery to make the resize happen        TB window   window parent document  height    body   height     50     where TB window is the div in which the Iframe is contained   body - the body tag of the aspx in the iframe   This script is attached to the iframe content  I am getting the TB window element from the parent page  While this works fine on Chrome  but the TB window collapses in Firefox  I am really confused lost on why that happens

User · Answer

I found the answer from Troy didn t work  This is the same code reworked for ajax     ajax                                             url   data php           dataType   json                                     success  function data                   Put the data onto the page             Resize the iframe         var iframe     window top document  find   iframe            iframe height  iframe 0  contentDocument body scrollHeight  px

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A slightly improved answer to Aristos      lt script type  text javascript  gt    function resizeIframe iframe        iframe height   iframe contentWindow document body scrollHeight    px        lt  script gt      Then declare in your iframe as follows    lt iframe onload  resizeIframe this         There are two minor improvements    You don t need to get the element via document getElementById - as you already have it in the onload callback  There s no need to set the iframe height      if you re going to reassign it in the very next statement  Doing so actually incurs an overhead as you re dealing with a DOM element    Edit  If the content in the frame is always changing then call   parent resizeIframe this frameElement      from within the iframe after the update  Works for same origin   Or to auto detect        on resize   this container   this frameElement contentWindow document body     this watch        gt        cancelAnimationFrame this watcher        if  this lastScrollHeight     container scrollHeight          parent resizeIframeToContentSize this frameElement               this lastScrollHeight   container scrollHeight      this watcher   requestAnimationFrame this watch          this watcher   window requestAnimationFrame this watch

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Add this to the iframe  this worked for me   onload  this height this contentWindow document body scrollHeight     And if you use jQuery try this code   onload    this  height   this contentWindow document body  find   div    first   height

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jQuery   home vidio img1 img   click function        video     lt iframe src     jQuery this  attr  data-video       gt  lt  iframe gt        jQuery this  replaceWith video        jQuery   home vidio img2 img   click function        video    lt iframe src     jQuery this  attr  data-video       gt  lt  iframe gt       jQuery   home vidio img1 img   replaceWith video       jQuery   home vidio img1 iframe   replaceWith video        jQuery   home vidio img3 img   click function        video     lt iframe src     jQuery this  attr  data-video       gt  lt  iframe gt        jQuery   home vidio img1 img   replaceWith video       jQuery   home vidio img1 iframe   replaceWith video        jQuery   home vidio img4 img   click function        video     lt iframe src     jQuery this  attr  data-video       gt  lt  iframe gt        jQuery   home vidio img1 img   replaceWith video       jQuery   home vidio img1 iframe   replaceWith video

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in my project there is one requirement that we have make dynamic screen like    Alignment of Dashboard while loading  it should display on an entire page and should get adjust dynamically  if user is maximizing or resizing the browser   s window  For this I have created url and used iframe to open one of the dynamic report which is written in cognos BI In jsp we have to embed BI report  I have used iframe to embed this report in jsp  following code is working in my case   lt iframe src    cognosUrl  onload  quot this style height  this contentDocument body scrollHeight 30    px   quot  scrolling  quot no quot  style  quot width  100   min-height  900px  border  none  overflow  hidden  height  30px  quot  gt  lt  iframe gt

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you could also add a repeating requestAnimationFrame to your resizeIframe  e g  from   BlueFish s answer  which would always be called before the browser paints the layout and you could update the height of the iframe when its content have changed their heights  e g  input forms  lazy loaded content etc    lt script type  text javascript  gt    function resizeIframe iframe        iframe height   iframe contentWindow document body scrollHeight    px       window requestAnimationFrame      gt  resizeIframe iframe         lt  script gt      lt iframe onload  resizeIframe this         your callback should be fast enough to have no big impact on your overall performance

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All other answers are correct but what if the iframe has some dynamic content like a map that loads later and dynamically changes your iframe scroll height  This is how I achieved it  var iFrameID   document getElementById  idIframe     intval    setInterval function    if iFrameID scrollHeight    iFrameID contentWindow document body scrollHeight        clearInterval intval    else     iFrameID height   iFrameID contentWindow document body scrollHeight    quot px quot         500   I  simply wrap the code inside setInterval which matches the iframe scroll height with iframe content scroll height then clear the interval

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just make iframe container position absolute and iframe will automatically change its height according to its content   lt style gt      iframe-container          display  block         position  absolute           change position as you need          bottom  0         left  0         right  0         top  0          iframe          margin  0         padding  0         border  0         width  100          background-color   fff         lt  style gt    lt div class  iframe-container  gt        lt iframe src  http   iframesourcepage  gt  lt  iframe gt    lt  div gt

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I am using jQuery and the code below working for me   var iframe     window top document  find   iframe id here    iframe height iframe contents   height    px

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document  height      -    body   offset   top   and   or    window  height     See Stack Overflow question How to get the height of a body element   Try this to find the height of the body in jQuery   if    body   height     It doesn t have a value if Firebug  Perhaps that s the problem

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The simple solution is to measure the width and height of the content area  and then use those measurements to calculate the bottom padding percentage   In this case  the measurements are 1680 x 720 px  so the padding on the bottom is 720   1680   0 43   100  which comes out to 43     canvas-container           position  relative      padding-bottom  43       720    1680   0 4286   43       height  0      overflow  hidden         canvas-container iframe           position  absolute      top  0      left  0      width  100       height  100

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To add to the chunk of window that seems to cut off at the bottom  especially when you don t have scrolling I used   function resizeIframe iframe        var addHeight   20    or whatever size is being cut off     iframe height   iframe contentWindow document body scrollHeight   addHeight    px

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You can retrieve the height of the IFRAME s content by using  contentWindow document body scrollHeight  After the IFRAME is loaded  you can then change the height by doing the following    lt script type  text javascript  gt    function iframeLoaded           var iFrameID   document getElementById  idIframe          if iFrameID                   here you can make the height  I delete it first  then I make it again             iFrameID height                   iFrameID height   iFrameID contentWindow document body scrollHeight    px                   lt  script gt       Then  on the IFRAME tag  you hook up the handler like this    lt iframe id  idIframe  onload  iframeLoaded          I had a situation a while ago where I additionally needed to call iframeLoaded from the IFRAME itself after a form-submission occurred within  You can accomplish that by doing the following within the IFRAME s content scripts   parent iframeLoaded

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There are four different properties you can look at to get the height of the content in an iFrame   document documentElement scrollHeight document documentElement offsetHeight document body scrollHeight document body offsetHeight   Sadly they can all give different answers and these are inconsistant between browsers  If you set the body margin to 0 then the document body offsetHeight gives the best answer  To get the correct value try this function  which is taken from the iframe-resizer library that also looks after keeping the iFrame the correct size when the content changes or the browser is resized   function getIFrameHeight        function getComputedBodyStyle prop            function getPixelValue value                var PIXEL      d  px    i               if  PIXEL test value                     return parseInt value base                              var                  style   el style left                  runtimeStyle   el runtimeStyle left               el runtimeStyle left   el currentStyle left              el style left   value    0              value   el style pixelLeft              el style left   style              el runtimeStyle left   runtimeStyle               return value                     var              el   document body              retVal   0           if  document defaultView  amp  amp  document defaultView getComputedStyle                retVal    document defaultView getComputedStyle el  null  prop             else    IE8  amp  below             retVal    getPixelValue el currentStyle prop                        return parseInt retVal 10              return document body offsetHeight           getComputedBodyStyle  marginTop             getComputedBodyStyle  marginBottom

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Just in case this helps anyone   I was pulling my hair out trying to get this to work  then I noticed that the iframe had a class entry with height 100    When I removed this  everything worked as expected   So  please check for any css conflicts

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A slightly improved answer to BlueFish     function resizeIframe iframe        var padding   50      if  iframe contentWindow document body scrollHeight  lt   window innerHeight - padding           iframe height   iframe contentWindow document body scrollHeight    px       else         iframe height    window innerHeight - padding     px       This takes in consideration the height of the windows screen browser  phone  which is good for responsive design and iframes that have huge height  Padding represents the padding you want above and below the iframe in the case it goes trough whole screen

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Rather than using javscript jquery the easiest way I found is     x000D   x000D   lt iframe style  min-height 98vh  src  http   yourdomain com  width  100   gt  lt  iframe gt  x000D   x000D   x000D    Here 1vh   1  of Browser window height  So the theoretical value of height to be set is 100vh but practically 98vh did the magic

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Other answers were not working for me so i did some changes  Hope this will help      iframe   on  load   function         var iframe     window top document  find   iframe        iframe height iframe 0  ownerDocument body scrollHeight  px

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You can refer related question here - How to make width and height of iframe same as its parent div   To set dynamic height -   We need to communicate with cross domain iFrames and parent Then we can send scroll height content height of iframe to parent window   And codes - https   gist github com mohandere a2e67971858ee2c3999d62e3843889a8

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I found that the accepted answer didn t suffice  since X-FRAME-OPTIONS  Allow-From isn t supported in safari or chrome   Went with a different approach instead  found in a presentation given by Ben Vinegar from Disqus   The idea is to add an event listener to the parent window  and then inside the iframe  use window postMessage to send an event to the parent telling it to do something  resize the iframe    So in the parent document  add an event listener   window addEventListener  message   function e      var  iframe   jQuery   myIframe      var eventName   e data 0     var data   e data 1     switch eventName        case  setHeight          iframe height data         break         false     And inside the iframe  write a function to post the message   function resize       var height   document getElementsByTagName  html   0  scrollHeight    window parent postMessage   setHeight   height              Finally  inside the iframe  add an onLoad to the body tag to fire the resize function    lt body onLoad  resize     gt

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This one is useful when you require a solution with no jquery  In that case you should try adding a container and set a padding to it in percentages  HTML example code    lt div class  iframecontainer  gt       lt iframe scrolling  no  src       class  iframeclass width  999px  height  618px  gt  lt  iframe gt   lt  div gt    CSS example code    iframeclass      position  absolute      top  0      width  100       iframecontainer      position  relative      width  100       height  auto      padding-top  61

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Sample using PHP htmlspecialchars     check if height exists and is   0     my html markup          Insert here HTML markup with CSS  JS      lt html gt  lt head gt  lt  head gt  lt body gt     lt  body gt  lt  html gt    iframe     lt iframe onload  if this contentWindow document body scrollHeight   this height   this contentWindow document body scrollHeight    width  100   src  javascript       htmlspecialchars  my html markup         gt  lt  iframe gt

[javascript] make iframe height dynamic based on content inside- JQUERY/Javascript

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