Fix: handle overflowing dropdowns on mobile (#7758)

See https://github.com/ng-bootstrap/ng-bootstrap/pull/4760

src-ui/src/app/utils/popper-options.spec.ts

@@ -0,0 +1,24 @@
+import { popperOptionsReenablePreventOverflow } from './popper-options'
+import { Options } from '@popperjs/core'
+
+describe('popperOptionsReenablePreventOverflow', () => {
+  it('should return the config without the empty fun preventOverflow, add padding to other', () => {
+    const config: Partial<Options> = {
+      modifiers: [
+        { name: 'preventOverflow', fn: function () {} },
+        {
+          name: 'preventOverflow',
+          fn: function () {
+            return
+          },
+        },
+      ],
+    }
+
+    const result = popperOptionsReenablePreventOverflow(config)
+
+    expect(result.modifiers.length).toBe(1)
+    expect(result.modifiers[0].name).toBe('preventOverflow')
+    expect(result.modifiers[0].options).toEqual({ padding: 10 })
+  })
+})

src-ui/src/app/utils/popper-options.ts

@@ -0,0 +1,24 @@
+import { Options } from '@popperjs/core'
+
+export function popperOptionsReenablePreventOverflow(
+  config: Partial<Options>
+): Partial<Options> {
+  const preventOverflowModifier = config.modifiers?.find(
+    (m) => m.name === 'preventOverflow' && m.fn?.length === 0
+  )
+  if (preventOverflowModifier) {
+    config.modifiers.splice(
+      config.modifiers.indexOf(preventOverflowModifier),
+      1
+    )
+  }
+  const ogPreventOverflowModifier = config.modifiers.find(
+    (m) => m.name === 'preventOverflow'
+  )
+  if (ogPreventOverflowModifier) {
+    ogPreventOverflowModifier.options = {
+      padding: 10,
+    }
+  }
+  return config
+}