element-plus/packages/components/affix/src/affix.ts

A Component Library for Vue 3

import { buildProps, definePropType } from '@element-plus/utils/props'

import type { ExtractPropTypes } from 'vue'
import type { ZIndexProperty } from 'csstype'

export const affixProps = buildProps({
  zIndex: {
    type: definePropType<ZIndexProperty>([Number, String]),
    default: 100,
  },
  target: {
    type: String,
    default: '',
  },
  offset: {
    type: Number,
    default: 0,
  },
  position: {
    type: String,
    values: ['top', 'bottom'],
    default: 'top',
  },
} as const)
export type AffixProps = ExtractPropTypes<typeof affixProps>

export const affixEmits = {
  scroll: ({ scrollTop, fixed }: { scrollTop: number; fixed: boolean }) =>
    typeof scrollTop === 'number' && typeof fixed === 'boolean',
  change: (fixed: boolean) => typeof fixed === 'boolean',
}
export type AffixEmits = typeof affixEmits