ui: remove sticky-kit

packages/ui-default/components/sticky/sticky.page.js

@@ -1,5 +1,3 @@
-import 'sticky-kit/dist/sticky-kit';
-
 import $ from 'jquery';
 import _ from 'lodash';
 import responsiveCutoff from 'vj/breakpoints.json';
@@ -10,38 +8,24 @@ const navHeight = isBelow(responsiveCutoff.mobile)
   ? 0
   : $('.nav').height();
 
-function updateStickies($stickies) {
-  $stickies.get().forEach((element) => {
-    const $sticky = $(element);
-    const shouldEnableSticky = (isAbove($sticky.data('sticky-cutoff-min')));
-    const stickyEnabled = $sticky.data('sticky-enabled');
-    if (shouldEnableSticky && !stickyEnabled) {
-      const stickyOptions = {};
-      const $stickyParent = $sticky.closest('[data-sticky-parent]');
-      if ($stickyParent.length > 0) {
-        stickyOptions.parent = $stickyParent;
-      }
-      stickyOptions.offset_top = 10 + navHeight;
-      $sticky.stick_in_parent(stickyOptions);
-      $sticky.data('sticky-enabled', true);
-    } else if (!shouldEnableSticky && stickyEnabled) {
-      $sticky.trigger('sticky_kit:detach');
-      $sticky.data('sticky-enabled', false);
-    }
-  });
-}
-
 function getCutoff(str) {
-  if (str === 'medium') {
-    return responsiveCutoff.mobile;
-  } if (str === 'large') {
-    return responsiveCutoff.desktop;
-  }
+  if (str === 'medium') return responsiveCutoff.mobile;
+  if (str === 'large') return responsiveCutoff.desktop;
   return 0;
 }
 
-function stickyRelayout() {
-  $('body').trigger('sticky_kit:recalc');
+function updateStickies($stickies) {
+  $stickies.get().forEach((element) => {
+    const $sticky = $(element);
+    const shouldEnableSticky = isAbove($sticky.data('sticky-cutoff-min'));
+    if (shouldEnableSticky) {
+      element.style.position = 'sticky';
+      element.style.top = `${10 + navHeight}px`;
+    } else {
+      element.style.position = '';
+      element.style.top = '';
+    }
+  });
 }
 
 const stickyPage = new AutoloadPage('stickyPage', () => {
@@ -54,13 +38,11 @@ const stickyPage = new AutoloadPage('stickyPage', () => {
       shouldListenResize = true;
     }
     $sticky.data('sticky-cutoff-min', getCutoff(minEnabledSize));
-    $sticky.data('sticky-enabled', false);
   });
   updateStickies($stickies);
   if (shouldListenResize) {
     $(window).on('resize', _.throttle(() => updateStickies($stickies), 300));
   }
-  $(document).on('vjLayout', _.throttle(stickyRelayout, 100));
 });
 
 export default stickyPage;

packages/ui-default/components/sticky/sticky.page.styl

@@ -0,0 +1,11 @@
+[data-sticky-parent]
+  display: flex
+  flex-wrap: wrap
+
+  &::before,
+  &::after
+    display: none
+
+  > .columns,
+  > .column
+    float: none

packages/ui-default/components/table/StyledTable.js

@@ -1,7 +1,4 @@
-import 'sticky-kit/dist/sticky-kit';
-
 import $ from 'jquery';
-import _ from 'lodash';
 import responsiveCutoff from 'vj/breakpoints.json';
 import DOMAttachedObject from 'vj/components/DOMAttachedObject';
 import { isBelow } from 'vj/utils/mediaQuery';
@@ -23,29 +20,53 @@ export default class StyledTable extends DOMAttachedObject {
 
     super($dom);
 
-    this.$container = $('<div>').addClass('section__table-container');
-    this.$container.insertBefore(this.$dom);
+    // Sentinel to detect when header becomes stuck
+    this.$sentinel = $('<div>').css({ height: 0, margin: 0, padding: 0 });
 
+    // Header sits outside the scroll container so sticky works against viewport
     this.$header = $('<table>');
     this.$header.attr('class', `${this.$dom.attr('class')} section__table-header`);
+    this.$header.css({
+      position: 'sticky',
+      top: `${navHeight}px`,
+    });
 
-    this.$container
-      .append(this.$header)
-      .append(this.$dom);
+    // Scroll container only wraps the data table
+    this.$container = $('<div>').addClass('section__table-container');
+    this.$sentinel.insertBefore(this.$dom);
+    this.$header.insertBefore(this.$dom);
+    this.$container.insertBefore(this.$dom);
+    this.$container.append(this.$dom);
 
     this.$header.empty();
     this.$dom.children('colgroup').clone().appendTo(this.$header);
     this.$dom.children('thead').appendTo(this.$header);
 
-    const stickyOptions = {
-      parent: this.$container,
-      offset_top: navHeight,
-    };
-    _.defer(() => this.$header.stick_in_parent(stickyOptions));
+    // Sync horizontal scroll between header and body
+    this.$container.on('scroll', () => {
+      this.$header.css('transform', `translateX(-${this.$container.scrollLeft()}px)`);
+    });
+
+    // Detect sticky state via IntersectionObserver
+    const header = this.$header[0];
+    const sentinel = this.$sentinel[0];
+    if (window.IntersectionObserver) {
+      this._observer = new IntersectionObserver(
+        ([entry]) => {
+          if (entry.isIntersecting) {
+            header.classList.remove('is_stuck');
+          } else {
+            header.classList.add('is_stuck');
+          }
+        },
+        { threshold: [0], rootMargin: `-${navHeight}px 0px 0px 0px` },
+      );
+      this._observer.observe(sentinel);
+    }
   }
 
   detach() {
+    if (this._observer) this._observer.disconnect();
     super.detach();
-    this.$header.trigger('sticky_kit:detach');
   }
 }

packages/ui-default/components/table/table.page.styl

@@ -46,22 +46,21 @@
     font-size: rem($font-size-small)
 
 .section__table-container
-  overflow: hidden
   overflow-x: auto
 
 .section__table-header
   background: $table-header-bg-color
   box-shadow: $table-header-shadow
-  position: relative
   z-index: 100
+  overflow: hidden
   transition: box-shadow .2s linear
 
-  thead > tr
-    border-bottom: 0
-
   &.is_stuck
     box-shadow: $table-header-shadow-floating
 
+  thead > tr
+    border-bottom: 0
+
 .section__table-container,
 .section__body
   & > .data-table

packages/ui-default/package.json

@@ -105,7 +105,6 @@
     "sass-loader": "^16.0.7",
     "schemastery": "^3.18.0",
     "shorty.js": "^1.0.1",
-    "sticky-kit": "^1.1.3",
     "style-loader": "^4.0.0",
     "stylus": "^0.64.0",
     "stylus-loader": "7.1.2",