How can I update window location hash without jumping the document

Question

I have a sliding panel set up on my website   When it finished animating  I set the hash like so  function        window location hash   id       this is a callback  and the id is assigned earlier    This works good  to allow the user to bookmark the panel  and also for the non JavaScript version to work   However  when I update the hash  the browser jumps to the location  I guess this is expected behaviour   My question is  how can I prevent this  I e  how can I change the window s hash  but not have the browser scroll to the element if the hash exists  Some sort of event preventDefault   sort of thing   I m using jQuery 1 4 and the scrollTo plugin   Many thanks   Update  Here is the code that changes the panel       something a   click function event        event preventDefault        var link     this       var id   link 0  hash           slider   scrollTo id  800            onAfter  function                  link parents  li   siblings   removeClass  active                link parent   addClass  active                window location hash   id

User · Answer

This solution worked for me     store the currently selected tab in the hash value     if history pushState            window history pushState null  null        id             else           window location hash   id            on load of the page  switch to the currently selected tab var hash   window location hash      myTab a href      hash         tab  show      And my full js code is      myTab a   click function e      e preventDefault        this  tab  show            store the currently selected tab in the hash value    ul nav-tabs  gt  li  gt  a   on  shown bs tab   function e      var id     e target  attr  href   substr 1       if history pushState            window history pushState null  null        id             else           window location hash   id              window location hash          id          on load of the page  switch to the currently selected tab var hash   window location hash     console log hash       myTab a href      hash         tab  show

User · Answer

Cheap and nasty solution   Use the ugly    style   To set it   window location hash          id    To read it   id   window location hash replace               Since it doesn t match and anchor or id in the page  it won t jump

User · Answer

This solution worked for me    The problem with setting location hash is that the page will jump to that id if it s found on the page   The problem with window history pushState is that it adds an entry to the history for each tab the user clicks  Then when the user clicks the back button  they go to the previous tab   this may or may not be what you want  it was not what I wanted    For me  replaceState was the better option in that it only replaces the current history  so when the user clicks the back button  they go to the previous page       tab-selector   tabs     activate  function e  ui        window history replaceState null  null  ui newPanel selector             Check out the History API docs on MDN

User · Answer

I used a combination of Attila Fulop  Lea Verou  solution for modern browsers and Gavin Brock solution for old browsers as follows   if  history pushState           IE10  Firefox  Chrome  etc      window history pushState null  null        id     else          IE9  IE8  etc     window location hash          id      As observed by Gavin Brock  to capture the id back you will have to treat the string  which in this case can have or not the      as follows   id   window location hash replace                Before that  I tried a solution similar to the one proposed by user706270  but it did not work well with Internet Explorer  as its Javascript engine is not very fast  you can notice the scroll increase and decrease  which produces a nasty visual effect

User · Answer

Why dont you get the current scroll position  put it in a variable then assign the hash and put the page scroll back to where it was   var yScroll document body scrollTop  window location hash   id  document body scrollTop yScroll    this should work

User · Answer

There is a workaround by using the history API on modern browsers with fallback on old ones   if history pushState        history pushState null  null    myhash      else       location hash     myhash       Credit goes to Lea Verou

User · Answer

When using laravel framework  I had some issues with using a route- back   function since it erased my hash  In order to keep my hash  I created a simple function     function            if  localStorage getItem  hash              location hash   localStorage getItem  hash                 and I set it in my other JS function like this   localStorage setItem  hash   myvalue     You can name your local storage values any way you like  mine named hash   Therefore  if the hash is set on PAGE1 and then you navigate to PAGE2  the hash will be recreated on PAGE1 when you click Back on PAGE2

User · Answer

The problem is you are setting the window location hash to an element s ID attribute  It is the expected behavior for the browser to jump to that element  regardless of whether you  preventDefault    or not   One way to get around this is to prefix the hash with an arbitrary value like so   window location hash    panel-    id replace             Then  all you need to do is to check for the prefixed hash on page load  As an added bonus  you can even smooth scroll to it since you are now in control of the hash value       function        var h   window location hash replace  panel-            if  h                slider   scrollTo h  800               If you need this to work at all times  and not just on the initial page load   you can use a function to monitor changes to the hash value and jump to the correct element on-the-fly   var foundHash  setInterval function         var h   window location hash replace  panel-            if  h  amp  amp  h     foundHash                slider   scrollTo h  800           foundHash   h           100

User · Answer

I m not sure if you can alter the original element but how about switch from using the id attr to something else like data-id  Then just read the value of data-id for your hash value and it won t jump

[javascript] How can I update window.location.hash without jumping the document?

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