jQuery - Get Width of Element when Not Visible Display None

Question

It seems like in jQuery when an element is not visible width   returns 0   Makes sense  but I need to get the width of a table in order to set the width of the parent before I show the parent   As noted below  there is text in the parent  that makes the parent skew and look nasty   I want the parent to be only as wide as the table and have the text wrap    lt div id  parent  gt      Text here     Can get very long and skew the parent      lt table gt       lt  table gt      Text here too     which is why I want to shrink the parent based on the table  lt  div gt    CSS    parent       display  none      Javascript   var tableWidth       parent   children  table   outerWidth    if  tableWidth  gt      parent   width              parent   width tableWidth       tableWidth always returns 0 since it is not visible  is my guess since it gives me a number when visible    Is there a way to get the width of the table without making the parent visible

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jQuery   megamenu li level0  dropdown-container  sub-column ul  level1   on  mouseover   function          var sum   0      jQuery this  find  ul li level2   each function        sum -  jQuery this  height        jQuery this  parent  ul   css  margin-top   sum   1 8       console log sum                 On hover we can calculate the list item height

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function realWidth obj       var clone   obj clone        clone css  visibility   hidden           body   append clone       var width   clone outerWidth        clone remove        return width    realWidth     parent   find  table first

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Here is a trick I have used   It involves adding some CSS properties to make jQuery think the element is visible  but in fact it is still hidden   var  table       parent   children  table     table css   position   absolute   visibility   hidden   display   block      var tableWidth    table outerWidth     table css   position      visibility      display           It is kind of a hack  but it seems to work fine for me   UPDATE  I have since written a blog post that covers this topic   The method used above has the potential to be problematic since you are resetting the CSS properties to empty values   What if they had values previously   The updated solution uses the swap   method that was found in the jQuery source code   Code from referenced blog post     Optional parameter includeMargin is used when calculating outer dimensions    function         fn getHiddenDimensions   function  includeMargin        var  item   this      props     position   absolute   visibility   hidden   display   block         dim     width  0  height  0  innerWidth  0  innerHeight  0  outerWidth  0  outerHeight  0         hiddenParents    item parents   andSelf   not   visible        includeMargin    includeMargin    null    false   includeMargin       var oldProps            hiddenParents each function              var old                for  var name in props                old name    this style name               this style name    props name                      oldProps push old                dim width    item width        dim outerWidth    item outerWidth includeMargin       dim innerWidth    item innerWidth        dim height    item height        dim innerHeight    item innerHeight        dim outerHeight    item outerHeight includeMargin         hiddenParents each function  i            var old   oldProps i           for  var name in props                this style name    old name                          return dim      jQuery

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Thank you for posting the realWidth function above  it really helped me   Based on  realWidth  function above  I wrote  a CSS reset   reason described below    function getUnvisibleDimensions obj        if    obj  length    0            return false             var clone   obj clone        clone css           visibility  hidden           width               height              maxWidth               maxHeight                    body   append clone       var width   clone outerWidth            height   clone outerHeight        clone remove        return  w width  h height        realWidth  gets the width of an existing tag  I tested this with some image tags  The problem was  when the image has given CSS dimension per width  or max-width   you will never get the real dimension of that image  Perhaps  the img has  max-width  100    the  realWidth  function clone it and append it to the body   If the original size of the image is bigger than the body  then you get the size of the body and not the real size of that image

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I try to find working function for hidden element but I realize that CSS is much complex than everyone think  There are a lot of new layout techniques in CSS3 that might not work for all previous answers like flexible box  grid  column or even element inside complex parent element   flexibox example   I think the only sustainable  amp  simple solution is real-time rendering  At that time  browser should give you that correct element size    Sadly  JavaScript does not provide any direct event to notify when element is showed or hidden  However  I create some function based on DOM Attribute Modified API that will execute callback function when visibility of element is changed       selector    onVisibleChanged function e  isVisible        var realWidth       selector    width        var realHeight       selector    height            render or adjust something       For more information  Please visit at my project GitHub   https   github com Soul-Master visible event js  demo  http   jsbin com ETiGIre 7

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One solution  though it won t work in all situations  is to hide the element by setting the opacity to 0   A completely transparent element will have width     The draw back is that the element will still take up space  but that won t be an issue in all cases     For example     img  css  opacity   0     element cannot be seen width     img  width        but has width

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If you need the width of something that s hidden and you can t un-hide it for whatever reason  you can clone it  change the CSS so it displays off the page  make it invisible  and then measure it   The user will be none the wiser if it s hidden and deleted afterwards   Some of the other answers here just make the visibility hidden which works  but it will take up a blank spot on your page for a fraction of a second   Example    itemClone       hidden-item   clone   css            visibility    hidden            position    absolute            z-index    -99999            left    99999999px            top    0px         appendTo  body    var width    itemClone width     itemClone remove

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Before take the width make the parent  display show  then take the width and finally make the parent display hide  Just like following       parent   show    var tableWidth       parent   children  table   outerWidth         parent   hide    if  tableWidth  gt      parent   width              parent   width     tableWidth

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As has been said before  the clone and attach elsewhere method does not guarantee the same results as styling may be different   Below is my approach  It travels up the parents looking for the parent responsible for the hiding  then temporarily unhides it to calculate the required width  height  etc    x000D   x000D      var width   parseInt  image width    10   x000D      var height   parseInt  image height    10   x000D   x000D      if  width     0    x000D   x000D          if   image css  display        none     x000D   x000D               image css  display    block    x000D              width   parseInt  image width    10   x000D              height   parseInt  image height    10   x000D               image css  display    none    x000D            x000D          else   x000D   x000D               image parents   each function      x000D   x000D                  var  parent     this   x000D                  if   parent css  display        none     x000D   x000D                       parent css  display    block    x000D                      width   parseInt  image width    10   x000D                      height   parseInt  image height    10   x000D                       parent css  display    none    x000D                    x000D                  x000D            x000D        x000D   x000D   x000D

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Based on Roberts answer  here is my function  This works for me if the element or its parent have been faded out via jQuery  can either get inner or outer dimensions and also returns the offset values    edit1  rewrote the function  it s now smaller and can be called directly on the object   edit2  the function will now insert the clone just after the original element instead of the body  making it possible for the clone to maintain inherited dimensions     fn getRealDimensions   function  outer        var  this     this       if   this length    0            return false            var  clone    this clone            show            css  visibility   hidden            insertAfter  this               var result             width        outer     clone outerWidth      clone innerWidth             height       outer     clone outerHeight      clone innerHeight             offsetTop    clone offset   top           offsetLeft   clone offset   left             clone remove        return result     var dimensions       hidden   getRealDimensions

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The biggest issue being missed by most solutions here is that an element s width is often changed by CSS based on where it is scoped in html   If I was to determine offsetWidth of an element by appending a clone of it to body when it has styles that only apply in its current scope I would get the wrong width   for example     css   module-container  my-elem    border  60px solid black     now when I try to determine my-elem s width in context of body it will be out by 120px  You could clone the module container instead  but your JS shouldn t have to know these details   I haven t tested it but essentially Soul Master s solution appears to be the only one that could work properly  But unfortunately looking at the implementation it will likely be costly to use and bad for performance  as most of the solutions presented here are as well    If at all possible then use visibility  hidden instead  This will still render the element  allowing you to calculate width without all the fuss

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In addition to the answer posted by Tim Banks  which followed to solving my issue I had to edit one simple thing   Someone else might have the same issue  I m working with a Bootstrap dropdown in a dropdown  But the text can be wider as the current content at this point  and there aren t many good ways to resolve that through css    I used     table css   position   absolute   visibility   hidden   display   table        instead  which sets the container to a table which always scales in width if the contents are wider

[jquery] jQuery - Get Width of Element when Not Visible (Display: None)

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