Restore offset option for tooltip/popover components

js/tests/unit/tooltip.spec.js

@@ -107,6 +107,41 @@ describe('Tooltip', () => {
       tooltipInContainerEl.click()
     })
 
+    it('should create offset modifier when offset is passed as a function', done => {
+      fixtureEl.innerHTML = '<a href="#" rel="tooltip" title="Offset from function">'
+
+      const getOffset = jasmine.createSpy('getOffset').and.returnValue([10, 20])
+      const tooltipEl = fixtureEl.querySelector('a')
+      const tooltip = new Tooltip(tooltipEl, {
+        offset: getOffset,
+        popperConfig: {
+          onFirstUpdate: state => {
+            expect(getOffset).toHaveBeenCalledWith({
+              popper: state.rects.popper,
+              reference: state.rects.reference,
+              placement: state.placement
+            }, tooltipEl)
+            done()
+          }
+        }
+      })
+
+      const offset = tooltip._getOffset()
+
+      expect(typeof offset).toEqual('function')
+
+      tooltip.show()
+    })
+
+    it('should create offset modifier when offset option is passed in data attribute', () => {
+      fixtureEl.innerHTML = '<a href="#" rel="tooltip" data-bs-offset="10,20" title="Another tooltip">'
+
+      const tooltipEl = fixtureEl.querySelector('a')
+      const tooltip = new Tooltip(tooltipEl)
+
+      expect(tooltip._getOffset()).toEqual([10, 20])
+    })
+
     it('should allow to pass config to Popper with `popperConfig`', () => {
       fixtureEl.innerHTML = '<a href="#" rel="tooltip">'