问题描述
我有一个像 https://zillow.github.io/react-slider 这样带有 min
和 max
值的双滑块。当其中一个滑块发生变化时,它会调用查询。
但是由于查询量很大,所以需要很多时间,我需要找到一种使用 debounce 的方法,以便不会经常调用查询。
我确实找到了一个很好的解决方案 → https://stackoverflow.com/a/58594348/6141587 只使用 React.js 但不确定如何将它与 urql
一起使用?
Home.tsx
import React from 'react'
import ReactSlider from 'react-slider'
import debounce from 'lodash.debounce'
import { AcquisitionList } from '../components/index'
const Home = () => {
const [price,setPrice] = React.useState([0,1000000000])
const debounceSetPrice = React.useCallback(debounce(setPrice,2000),[])
return (
<div className="h-full p-8 text-white bg-blue-gray-900">
<div className="flex items-center justify-center">
<div className="flex flex-col items-center text-white">
<span className="">Min</span>
<input
className="text-lg font-bold text-center min-w-16 rounded-xl bg-gradient-to-b from-indigo-700 bg-blue-gray-900"
name="minPrice"
type="text"
value={price[0]}
onChange={(e) => {
const minPrice = e.target.value
const maxPrice = price[1]
debounceSetPrice([minPrice,maxPrice])
}}
/>
</div>
<ReactSlider
step={1}
min={0}
max={1000000000}
className="w-1/2 h-5 pr-2 mx-8 my-4 rounded-md bg-blue-gray-700 cursor-grab"
thumbClassName="absolute w-8 h-8 cursor-[grab] rounded-full focus:outline-none focus:ring-2 focus:ring-offset-2 ring-offset-blue-gray-700 -top-1 bg-gradient-to-b from-indigo-700 bg-blue-gray-900 focus:ring-indigo-500 focus:border-indigo-500"
ariaLabel={['Min Price','Max Price']}
value={price}
onChange={(price) => {
debounceSetPrice(price)
}}
/>
<div className="flex flex-col items-center text-white">
<span className="">Max</span>
<input
className="text-lg font-bold text-center min-w-16 rounded-xl bg-gradient-to-b from-indigo-700 bg-blue-gray-900"
name="maxPrice"
type="text"
value={price[1]}
onChange={(e) => {
const minPrice = price[0]
const maxPrice = e.target.value
debounceSetPrice([minPrice,maxPrice])
}}
/>
</div>
</div>
<AcquisitionList minPrice={price[0]} maxPrice={price[1]} />
</div>
)
}
export default Home
收购列表.tsx
import React from 'react'
import { useQuery } from 'urql'
import { Card } from '../components/index'
import {
GET_ALL_ACQUISITIONS,GET_ACQUISITIONS_BY_PRICE,} from '../graphql/index'
export const AcquisitionList = ({ minPrice,maxPrice }) => {
const [result,reexecuteQuery] = useQuery({
query: GET_ALL_ACQUISITIONS,variables: {
minPrice,maxPrice,skip: 10,take: 10,},})
const { data,fetching,error } = result
if (fetching) return <p>Loading...</p>
if (error) return <p>Oh no... {error.message}</p>
return (
<div className="flex flex-wrap justify-center mt-10">
{data.getAllAcquisitions.map((startup,i) => {
return <Card key={i} startup={startup} index={i} />
})}
</div>
)
}
我当前的解决方案将滑块值延迟 2 秒更改,这在我直接调用 debounceSetPrice
时很有意义。我该如何解决这个问题?
解决方法
我找到了解决方案 thanks to URQL maintainer Jovi:
const Home = () => {
const priceRange = [0,100000000000] // minPrice = 0,maxPrice = 100 billion
const timeout = React.useRef(null)
const [acquisitionPriceRange,setAcquisitionPriceRange] = React.useState(
priceRange
)
const [price,setPrice] = React.useState(priceRange)
React.useEffect(() => {
timeout.current = setTimeout(() => {
setAcquisitionPriceRange(price)
timeout.current = null
},2000)
return () => {
if (timeout.current) clearTimeout(timeout.current)
}
},[price])
return (
<div className="h-full min-h-screen p-8 text-white bg-blue-gray-900">
.
.
.
<AcquisitionList
minPrice={acquisitionPriceRange[0]}
maxPrice={acquisitionPriceRange[1]}
undisclosed={enabled}
sortByPrice={sortByPrice}
sortByStartupName={sortByStartupName}
/>
</div>
)
}
export default Home
我同步设置了该值,因此 UI 不会延迟并为我在 React.useEffect
中传递的状态排队去抖动。我将相同的去抖动状态传递给 <AcquisitionList minPrice={acquisitionPriceRange[0]} maxPrice={acquisitionPriceRange[1]} />