fix(components): [el-date-picker] ignore special flag (#5200)

fix #5067

packages/components/date-picker/__tests__/date-picker.spec.ts

@@ -325,6 +325,26 @@ describe('DatePicker', () => {
     expect(text.includes('csw')).toBeTruthy()
   })
 
+  it('custom content bail out slot compoent', async () => {
+    _mount(
+      `<el-date-picker
+        v-model="value"
+        ref="input">
+        <slot name="testest"></slot>
+      </el-date-picker>`,
+      () => ({ value: '' }),
+      {
+        mounted() {
+          this.$refs.input.focus()
+        },
+      }
+    )
+    await nextTick()
+    const el = document.querySelector<HTMLElement>('td.available')
+    const text = el.textContent
+    expect(!!text).toBeTruthy()
+  })
+
   describe('value-format', () => {
     it('with literal string', async () => {
       const day = dayjs()

packages/components/date-picker/src/date-picker-com/basic-cell-render.ts

@@ -16,7 +16,9 @@ export default defineComponent({
       const cell = props.cell
       if (picker?.ctx.slots.default) {
         const list = picker.ctx.slots.default(cell).filter((item) => {
-          return item.type.toString() !== 'Symbol(Comment)'
+          return (
+            item.patchFlag !== -2 && item.type.toString() !== 'Symbol(Comment)'
+          )
         })
         if (list.length) {
           return list