Remove unused popover directive

This removes the unused popover directive and related source code.
Thanks to th work done as part of the epics:

- https://gitlab.com/groups/gitlab-org/-/epics/4409
- https://gitlab.com/groups/gitlab-org/-/epics/4383

we are not reliant on Bootstrap's tooltip and popover implementations
anymore and they can be safely removed.

app/assets/javascripts/commons/bootstrap.js

@@ -6,8 +6,6 @@ import 'bootstrap/js/dist/button';
 import 'bootstrap/js/dist/collapse';
 import 'bootstrap/js/dist/modal';
 import 'bootstrap/js/dist/dropdown';
-import 'bootstrap/js/dist/popover';
-import 'bootstrap/js/dist/tooltip';
 import 'bootstrap/js/dist/tab';
 
 // custom jQuery functions
@@ -19,68 +17,3 @@ $.fn.extend({
     return $(this).prop('disabled', false).removeClass('disabled');
   },
 });
-
-/*
- Starting with bootstrap 4.3.1, bootstrap sanitizes html used for tooltips / popovers.
- This extends the default whitelists with more elements / attributes:
- https://getbootstrap.com/docs/4.3/getting-started/javascript/#sanitizer
- */
-const whitelist = $.fn.tooltip.Constructor.Default.whiteList;
-
-const inputAttributes = ['value', 'type'];
-
-const dataAttributes = [
-  'data-toggle',
-  'data-placement',
-  'data-container',
-  'data-title',
-  'data-class',
-  'data-clipboard-text',
-  'data-placement',
-];
-
-// Whitelisting data attributes
-whitelist['*'] = [
-  ...whitelist['*'],
-  ...dataAttributes,
-  'title',
-  'width height',
-  'abbr',
-  'datetime',
-  'name',
-  'width',
-  'height',
-];
-
-// Whitelist missing elements:
-whitelist.label = ['for'];
-whitelist.button = [...inputAttributes];
-whitelist.input = [...inputAttributes];
-
-whitelist.tt = [];
-whitelist.samp = [];
-whitelist.kbd = [];
-whitelist.var = [];
-whitelist.dfn = [];
-whitelist.cite = [];
-whitelist.big = [];
-whitelist.address = [];
-whitelist.dl = [];
-whitelist.dt = [];
-whitelist.dd = [];
-whitelist.abbr = [];
-whitelist.acronym = [];
-whitelist.blockquote = [];
-whitelist.del = [];
-whitelist.ins = [];
-whitelist['gl-emoji'] = [
-  'data-name',
-  'data-unicode-version',
-  'data-fallback-src',
-  'data-fallback-sprite-class',
-];
-
-// Whitelisting SVG tags and attributes
-whitelist.svg = ['viewBox'];
-whitelist.use = ['xlink:href'];
-whitelist.path = ['d'];

app/assets/javascripts/shared/popover.js

-import $ from 'jquery';
-import { debounce } from 'lodash';
-
-export function togglePopover(show) {
-  const isAlreadyShown = this.hasClass('js-popover-show');
-  if ((show && isAlreadyShown) || (!show && !isAlreadyShown)) {
-    return false;
-  }
-  this.popover(show ? 'show' : 'hide');
-  this.toggleClass('disable-animation js-popover-show', show);
-
-  return true;
-}
-
-export function mouseleave() {
-  if (!$('.popover:hover').length > 0) {
-    const $popover = $(this);
-    togglePopover.call($popover, false);
-  }
-}
-
-export function mouseenter() {
-  const $popover = $(this);
-
-  const showedPopover = togglePopover.call($popover, true);
-  if (showedPopover) {
-    $('.popover').on('mouseleave', mouseleave.bind($popover));
-  }
-}
-
-export function debouncedMouseleave(debounceTimeout = 300) {
-  return debounce(mouseleave, debounceTimeout);
-}

app/assets/stylesheets/bootstrap_migration.scss

@@ -170,12 +170,6 @@ table {
   display: none;
 }
 
-h3.popover-header {
-  // Default bootstrap popovers use <h3>
-  // which we default to having a top margin
-  margin-top: 0;
-}
-
 // Add to .label so that old system notes that are saved to the db
 // will still receive the correct styling
 .badge:not(.gl-badge),

spec/frontend/awards_handler_spec.js

@@ -188,8 +188,6 @@ describe('AwardsHandler', () => {
 
       expect($thumbsUpEmoji.hasClass('active')).toBe(true);
       expect($thumbsDownEmoji.hasClass('active')).toBe(false);
-      $thumbsUpEmoji.tooltip();
-      $thumbsDownEmoji.tooltip();
       awardsHandler.addAward($votesBlock, awardUrl, 'thumbsdown', true);
 
       expect($thumbsUpEmoji.hasClass('active')).toBe(false);
@@ -217,9 +215,8 @@ describe('AwardsHandler', () => {
       const $thumbsUpEmoji = $votesBlock.find('[data-name=thumbsup]').parent();
       $thumbsUpEmoji.attr('data-title', 'sam, jerry, max, and andy');
       awardsHandler.addAward($votesBlock, awardUrl, 'thumbsup', false);
-      $thumbsUpEmoji.tooltip();
 
-      expect($thumbsUpEmoji.data('originalTitle')).toBe('You, sam, jerry, max, and andy');
+      expect($thumbsUpEmoji.attr('title')).toBe('You, sam, jerry, max, and andy');
     });
 
     it('handles the special case where "You" is not cleanly comma separated', () => {
@@ -228,9 +225,8 @@ describe('AwardsHandler', () => {
       const $thumbsUpEmoji = $votesBlock.find('[data-name=thumbsup]').parent();
       $thumbsUpEmoji.attr('data-title', 'sam');
       awardsHandler.addAward($votesBlock, awardUrl, 'thumbsup', false);
-      $thumbsUpEmoji.tooltip();
 
-      expect($thumbsUpEmoji.data('originalTitle')).toBe('You and sam');
+      expect($thumbsUpEmoji.attr('title')).toBe('You and sam');
     });
   });
 
@@ -242,9 +238,8 @@ describe('AwardsHandler', () => {
       $thumbsUpEmoji.attr('data-title', 'You, sam, jerry, max, and andy');
       $thumbsUpEmoji.addClass('active');
       awardsHandler.addAward($votesBlock, awardUrl, 'thumbsup', false);
-      $thumbsUpEmoji.tooltip();
 
-      expect($thumbsUpEmoji.data('originalTitle')).toBe('sam, jerry, max, and andy');
+      expect($thumbsUpEmoji.attr('title')).toBe('sam, jerry, max, and andy');
     });
 
     it('handles the special case where "You" is not cleanly comma separated', () => {
@@ -254,9 +249,8 @@ describe('AwardsHandler', () => {
       $thumbsUpEmoji.attr('data-title', 'You and sam');
       $thumbsUpEmoji.addClass('active');
       awardsHandler.addAward($votesBlock, awardUrl, 'thumbsup', false);
-      $thumbsUpEmoji.tooltip();
 
-      expect($thumbsUpEmoji.data('originalTitle')).toBe('sam');
+      expect($thumbsUpEmoji.attr('title')).toBe('sam');
     });
   });
 

spec/frontend/shared/popover_spec.js

-import $ from 'jquery';
-import { togglePopover, mouseleave, mouseenter } from '~/shared/popover';
-
-describe('popover', () => {
-  describe('togglePopover', () => {
-    describe('togglePopover(true)', () => {
-      it('returns true when popover is shown', () => {
-        const context = {
-          hasClass: () => false,
-          popover: () => {},
-          toggleClass: () => {},
-        };
-
-        expect(togglePopover.call(context, true)).toEqual(true);
-      });
-
-      it('returns false when popover is already shown', () => {
-        const context = {
-          hasClass: () => true,
-        };
-
-        expect(togglePopover.call(context, true)).toEqual(false);
-      });
-
-      it('shows popover', (done) => {
-        const context = {
-          hasClass: () => false,
-          popover: () => {},
-          toggleClass: () => {},
-        };
-
-        jest.spyOn(context, 'popover').mockImplementation((method) => {
-          expect(method).toEqual('show');
-          done();
-        });
-
-        togglePopover.call(context, true);
-      });
-
-      it('adds disable-animation and js-popover-show class', (done) => {
-        const context = {
-          hasClass: () => false,
-          popover: () => {},
-          toggleClass: () => {},
-        };
-
-        jest.spyOn(context, 'toggleClass').mockImplementation((classNames, show) => {
-          expect(classNames).toEqual('disable-animation js-popover-show');
-          expect(show).toEqual(true);
-          done();
-        });
-
-        togglePopover.call(context, true);
-      });
-    });
-
-    describe('togglePopover(false)', () => {
-      it('returns true when popover is hidden', () => {
-        const context = {
-          hasClass: () => true,
-          popover: () => {},
-          toggleClass: () => {},
-        };
-
-        expect(togglePopover.call(context, false)).toEqual(true);
-      });
-
-      it('returns false when popover is already hidden', () => {
-        const context = {
-          hasClass: () => false,
-        };
-
-        expect(togglePopover.call(context, false)).toEqual(false);
-      });
-
-      it('hides popover', (done) => {
-        const context = {
-          hasClass: () => true,
-          popover: () => {},
-          toggleClass: () => {},
-        };
-
-        jest.spyOn(context, 'popover').mockImplementation((method) => {
-          expect(method).toEqual('hide');
-          done();
-        });
-
-        togglePopover.call(context, false);
-      });
-
-      it('removes disable-animation and js-popover-show class', (done) => {
-        const context = {
-          hasClass: () => true,
-          popover: () => {},
-          toggleClass: () => {},
-        };
-
-        jest.spyOn(context, 'toggleClass').mockImplementation((classNames, show) => {
-          expect(classNames).toEqual('disable-animation js-popover-show');
-          expect(show).toEqual(false);
-          done();
-        });
-
-        togglePopover.call(context, false);
-      });
-    });
-  });
-
-  describe('mouseleave', () => {
-    it('calls hide popover if .popover:hover is false', () => {
-      const fakeJquery = {
-        length: 0,
-      };
-
-      jest
-        .spyOn($.fn, 'init')
-        .mockImplementation((selector) => (selector === '.popover:hover' ? fakeJquery : $.fn));
-      jest.spyOn(togglePopover, 'call').mockImplementation(() => {});
-      mouseleave();
-
-      expect(togglePopover.call).toHaveBeenCalledWith(expect.any(Object), false);
-    });
-
-    it('does not call hide popover if .popover:hover is true', () => {
-      const fakeJquery = {
-        length: 1,
-      };
-
-      jest
-        .spyOn($.fn, 'init')
-        .mockImplementation((selector) => (selector === '.popover:hover' ? fakeJquery : $.fn));
-      jest.spyOn(togglePopover, 'call').mockImplementation(() => {});
-      mouseleave();
-
-      expect(togglePopover.call).not.toHaveBeenCalledWith(false);
-    });
-  });
-
-  describe('mouseenter', () => {
-    const context = {};
-
-    it('shows popover', () => {
-      jest.spyOn(togglePopover, 'call').mockReturnValue(false);
-      mouseenter.call(context);
-
-      expect(togglePopover.call).toHaveBeenCalledWith(expect.any(Object), true);
-    });
-
-    it('registers mouseleave event if popover is showed', (done) => {
-      jest.spyOn(togglePopover, 'call').mockReturnValue(true);
-      jest.spyOn($.fn, 'on').mockImplementation((eventName) => {
-        expect(eventName).toEqual('mouseleave');
-        done();
-      });
-      mouseenter.call(context);
-    });
-
-    it('does not register mouseleave event if popover is not showed', () => {
-      jest.spyOn(togglePopover, 'call').mockReturnValue(false);
-      const spy = jest.spyOn($.fn, 'on').mockImplementation(() => {});
-      mouseenter.call(context);
-
-      expect(spy).not.toHaveBeenCalled();
-    });
-  });
-});