useScroll

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上次更改

5 天前

响应式的滚动位置和状态。

演示

源代码

左上

左下

右上

右下

滚动我

X 轴位置

Y 轴位置

平滑滚动正在滚动false

到达顶部

true

到达右侧

false

到达底部

false

到达左侧

true

向上滚动

false

向右滚动

false

向下滚动

false

向左滚动

false

用法

vue

<script setup lang="ts">
import { useScroll } from '@vueuse/core'
import { useTemplateRef } from 'vue'

const el = useTemplateRef<HTMLElement>('el')
const { x, y, isScrolling, arrivedState, directions } = useScroll(el)
</script>

<template>
  <div ref="el" />
</template>

带偏移量

const { x, y, isScrolling, arrivedState, directions } = useScroll(el, {
  offset: { top: 30, bottom: 30, right: 30, left: 30 },
})

设置滚动位置

设置 x 和 y 值以使元素滚动到该位置。

vue

<script setup lang="ts">
import { useScroll } from '@vueuse/core'
import { useTemplateRef } from 'vue'

const el = useTemplateRef<HTMLElement>('el')
const { x, y } = useScroll(el)
</script>

<template>
  <div ref="el" />
  <button @click="x += 10">
    Scroll right 10px
  </button>
  <button @click="y += 10">
    Scroll down 10px
  </button>
</template>

平滑滚动

设置 behavior: smooth 以启用平滑滚动。behavior 选项默认为 auto，这意味着不进行平滑滚动。有关更多信息，请参阅 window.scrollTo() 上的 behavior 选项。

TypeScript

import { useScroll } from '@vueuse/core'
import { useTemplateRef } from 'vue'

const el = useTemplateRef<HTMLElement>('el')
const { x, y } = useScroll(el, { behavior: 'smooth' })

// Or as a `ref`:
const smooth = ref(false)
const behavior = computed(() => smooth.value ? 'smooth' : 'auto')
const { x, y } = useScroll(el, { behavior })

import { useScroll } from '@vueuse/core'
import { useTemplateRef } from 'vue'
const el = useTemplateRef('el')
const { x, y } = useScroll(el, { behavior: 'smooth' })
// Or as a `ref`:
const smooth = ref(false)
const behavior = computed(() => (smooth.value ? 'smooth' : 'auto'))
const { x, y } = useScroll(el, { behavior })

指令用法

此函数还通过 @vueuse/components 包提供指令版本。了解更多关于用法的信息。

vue

<script setup lang="ts">
import type { UseScrollReturn } from '@vueuse/core'
import { vScroll } from '@vueuse/components'

const data = ref([1, 2, 3, 4, 5, 6])

function onScroll(state: UseScrollReturn) {
  console.log(state) // {x, y, isScrolling, arrivedState, directions}
}
</script>

<template>
  <div v-scroll="onScroll">
    <div v-for="item in data" :key="item">
      {{ item }}
    </div>
  </div>

  <!-- with options -->
  <div v-scroll="[onScroll, { throttle: 10 }]">
    <div v-for="item in data" :key="item">
      {{ item }}
    </div>
  </div>
</template>

类型声明

显示类型声明

typescript

export interface UseScrollOptions extends ConfigurableWindow {
  /**
   * Throttle time for scroll event, it’s disabled by default.
   *
   * @default 0
   */
  throttle?: number
  /**
   * The check time when scrolling ends.
   * This configuration will be setting to (throttle + idle) when the `throttle` is configured.
   *
   * @default 200
   */
  idle?: number
  /**
   * Offset arrived states by x pixels
   *
   */
  offset?: {
    left?: number
    right?: number
    top?: number
    bottom?: number
  }
  /**
   * Trigger it when scrolling.
   *
   */
  onScroll?: (e: Event) => void
  /**
   * Trigger it when scrolling ends.
   *
   */
  onStop?: (e: Event) => void
  /**
   * Listener options for scroll event.
   *
   * @default {capture: false, passive: true}
   */
  eventListenerOptions?: boolean | AddEventListenerOptions
  /**
   * Optionally specify a scroll behavior of `auto` (default, not smooth scrolling) or
   * `smooth` (for smooth scrolling) which takes effect when changing the `x` or `y` refs.
   *
   * @default 'auto'
   */
  behavior?: MaybeRefOrGetter<ScrollBehavior>
  /**
   * On error callback
   *
   * Default log error to `console.error`
   */
  onError?: (error: unknown) => void
}
/**
 * Reactive scroll.
 *
 * @see https://vueuse.org.cn/useScroll
 * @param element
 * @param options
 */
export declare function useScroll(
  element: MaybeRefOrGetter<
    HTMLElement | SVGElement | Window | Document | null | undefined
  >,
  options?: UseScrollOptions,
): {
  x: WritableComputedRef<number, number>
  y: WritableComputedRef<number, number>
  isScrolling: ShallowRef<boolean, boolean>
  arrivedState: {
    left: boolean
    right: boolean
    top: boolean
    bottom: boolean
  }
  directions: {
    left: boolean
    right: boolean
    top: boolean
    bottom: boolean
  }
  measure(): void
}
export type UseScrollReturn = ReturnType<typeof useScroll>