4dkankan-components/docs/examples/scrollbar/manual-scroll.vue

<template>
    <el-scrollbar ref="scrollbarRef" height="400px" always @scroll="scroll">
        <div ref="innerRef">
            <p v-for="item in 20" :key="item" class="scrollbar-demo-item">
                {{ item }}
            </p>
        </div>
    </el-scrollbar>

    <el-slider v-model="value" :max="max" :format-tooltip="formatTooltip" @input="inputSlider" />
</template>

<script lang="ts" setup>
import { onMounted, ref } from 'vue'
import type { ElScrollbar } from 'element-plus'

const max = ref(0)
const value = ref(0)
const innerRef = ref<HTMLDivElement>()
const scrollbarRef = ref<InstanceType<typeof ElScrollbar>>()

onMounted(() => {
    max.value = innerRef.value!.clientHeight - 380
})

const inputSlider = (value: number) => {
    scrollbarRef.value!.setScrollTop(value)
}
const scroll = ({ scrollTop }) => {
    value.value = scrollTop
}
const formatTooltip = (value: number) => {
    return `${value} px`
}
</script>

<style scoped>
.scrollbar-demo-item {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 50px;
    margin: 10px;
    text-align: center;
    border-radius: 4px;
    background: var(--el-color-primary-light-9);
    color: var(--el-color-primary);
}
.el-slider {
    margin-top: 20px;
}
</style>