Persist toggle (show/hide) state when form is submitted using window.localStorage

Hello,

I have a form that use the collapse.js of django admin (outiste django admin). I would like to persist the show/hide fieldsets state when the form is submitted. According to this question this can be achieve with a window.localStorage. What could be an efficient way to use it inside django admin collapse.js ? How should I modify collapse.js to achieve this?

collapse.js

(function($) {      $(document).ready(function() {      // Add anchor tag for Show/Hide link          $("fieldset.collapse").each(function(i, elem) {          // Don't hide if fields in this fieldset have errors              if ($(elem).find("div.errors").length == 0) {                  $(elem).addClass("collapsed").find("h2").first().append(' (<a id="fieldsetcollapser' +                      i +'" class="collapse-toggle" href="#">' + gettext("Show") +                      '</a>)');              }          });          // Add toggle to anchor tag          $("fieldset.collapse a.collapse-toggle").toggle(              function() { // Show                  $(this).text(gettext("Hide")).closest("fieldset").removeClass("collapsed").trigger("show.fieldset", [$(this).attr("id")]);                  return false;              },                function() { // Hide                  $(this).text(gettext("Show")).closest("fieldset").addClass("collapsed").trigger("hide.fieldset", [$(this).attr("id")]);                  return false;              }          );      });  })(django.jQuery);

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