1 files changed, 120 insertions, 0 deletions
diff --git a/app/assets/javascripts/tooltips/index.js b/app/assets/javascripts/tooltips/index.js
new file mode 100644
index 00000000000..cfbd88d6c40
--- /dev/null
+++ b/app/assets/javascripts/tooltips/index.js
@@ -0,0 +1,120 @@
+import Vue from 'vue';
+import jQuery from 'jquery';
+import { toArray, isFunction } from 'lodash';
+import Tooltips from './components/tooltips.vue';
+
+let app;
+
+const EVENTS_MAP = {
+  hover: 'mouseenter',
+  click: 'click',
+  focus: 'focus',
+};
+
+const DEFAULT_TRIGGER = 'hover focus';
+const APP_ELEMENT_ID = 'gl-tooltips-app';
+
+const tooltipsApp = () => {
+  if (!app) {
+    const container = document.createElement('div');
+
+    container.setAttribute('id', APP_ELEMENT_ID);
+    document.body.appendChild(container);
+
+    app = new Vue({
+      render(h) {
+        return h(Tooltips, {
+          props: {
+            elements: this.elements,
+          },
+          ref: 'tooltips',
+        });
+      },
+    }).$mount(container);
+  }
+
+  return app.$refs.tooltips;
+};
+
+const isTooltip = (node, selector) => node.matches && node.matches(selector);
+
+const addTooltips = (elements, config) => {
+  tooltipsApp().addTooltips(toArray(elements), config);
+};
+
+const handleTooltipEvent = (rootTarget, e, selector, config = {}) => {
+  for (let { target } = e; target && target !== rootTarget; target = target.parentNode) {
+    if (isTooltip(target, selector)) {
+      addTooltips([target], {
+        show: true,
+        ...config,
+      });
+      break;
+    }
+  }
+};
+
+const applyToElements = (elements, handler) => toArray(elements).forEach(handler);
+
+const invokeBootstrapApi = (elements, method) => {
+  if (isFunction(elements.tooltip)) {
+    jQuery(elements).tooltip(method);
+  }
+};
+
+const isGlTooltipsEnabled = () => Boolean(window.gon.glTooltipsEnabled);
+
+const tooltipApiInvoker = ({ glHandler, bsHandler }) => (elements, ...params) => {
+  if (isGlTooltipsEnabled()) {
+    applyToElements(elements, glHandler);
+  } else {
+    bsHandler(elements, ...params);
+  }
+};
+
+export const initTooltips = (config = {}) => {
+  if (isGlTooltipsEnabled()) {
+    const triggers = config?.triggers || DEFAULT_TRIGGER;
+    const events = triggers.split(' ').map(trigger => EVENTS_MAP[trigger]);
+
+    events.forEach(event => {
+      document.addEventListener(
+        event,
+        e => handleTooltipEvent(document, e, config.selector, config),
+        true,
+      );
+    });
+
+    return tooltipsApp();
+  }
+
+  return invokeBootstrapApi(document.body, config);
+};
+export const dispose = tooltipApiInvoker({
+  glHandler: element => tooltipsApp().dispose(element),
+  bsHandler: elements => invokeBootstrapApi(elements, 'dispose'),
+});
+export const fixTitle = tooltipApiInvoker({
+  glHandler: element => tooltipsApp().fixTitle(element),
+  bsHandler: elements => invokeBootstrapApi(elements, '_fixTitle'),
+});
+export const enable = tooltipApiInvoker({
+  glHandler: element => tooltipsApp().triggerEvent(element, 'enable'),
+  bsHandler: elements => invokeBootstrapApi(elements, 'enable'),
+});
+export const disable = tooltipApiInvoker({
+  glHandler: element => tooltipsApp().triggerEvent(element, 'disable'),
+  bsHandler: elements => invokeBootstrapApi(elements, 'disable'),
+});
+export const hide = tooltipApiInvoker({
+  glHandler: element => tooltipsApp().triggerEvent(element, 'close'),
+  bsHandler: elements => invokeBootstrapApi(elements, 'hide'),
+});
+export const show = tooltipApiInvoker({
+  glHandler: element => tooltipsApp().triggerEvent(element, 'open'),
+  bsHandler: elements => invokeBootstrapApi(elements, 'show'),
+});
+export const destroy = () => {
+  tooltipsApp().$destroy();
+  app = null;
+};