vue3利用store实现记录滚动位置的示例

const savePosY = () => {
      if(state.timer) return;
      state.timer = setTimeout(() => {
        let node = document.querySelector(".contentWrapper")；
        //记录滚动位置
        store.commit("setY",node.scrollTop)
        state.timer = null;
        clearTimeout(state.timer);
      },100)

onMounted(() => {
    let contentWrapper = document.querySelector(".contentWrapper");
    contentWrapper.addEventListener("scroll",savePosY);
})

export default {
    state:{
         y:0
    },
    mutations:{
        setY(state,value){
            state.y = value;
        }
    }
}