Filter element based on data key value

Question

Say I have 4 div elements with class  navlink  which  when clicked  use  data   to set a key called  selected   to a value of true       navlink  click function       this  data  selected   true        Every time a new  navlink is clicked  I would like to store the previously selected navlink for later manipulation  Is there a quick and easy way to select an element based on what was stored using  data     There don t seem to be any jQuery  filters that fit the bill  and I tried the following  within the same click event   but for some reason it doesn t work   var  previous       navlink   filter       function       this  data  selected      true        I know that there are other ways to accomplish this  but right now I m mostly just curious if it can be done via  data

User · Answer

Just for the record  you can filter on data with jquery  this question is quite old  and jQuery evolved since then  so it s right to write this solution as well        navlink data-selected  true        or  better  for performance        navlink   filter   data-selected  true        or  if you want to get all the elements with data-selected set       data-selected      Note that this method will only work with data that was set via html-attributes  If you set or change data with the  data   call  this method will no longer work

User · Answer

We can make a plugin pretty easily     fn filterData   function key  value        return this filter function             return   this  data key     value               Usage  checking a radio button       input name location id    filterData  my-data   data-val   prop  checked  true

User · Answer

your filter would work  but you need to return true on matching objects in the function passed to the filter for it to grab them   var  previous       navlink   filter function        return   this  data  selected      true

User · Answer

Sounds like more work than its worth   1  Why not just have a single JavaScript variable that stores a reference to the currently selected element jQuery object   2  Why not add a class to the currently selected element   Then you could query the DOM for the   active  class or something

User · Answer

Two things I noticed  they may be mistakes from when you wrote it down though     You missed a dot in the first example       navlink   click   For filter to work  you have to return a value   return   this  data  selected    true

[jquery] Filter element based on .data() key/value

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