vue-query

https://github.com/ryanwang520/vue-query

Composition API for fetching asynchronous data in Vue.

• 🔥 Simple API
• 🎗TypeScript Support
• 💪 Hide the Complexity of Reactive

Depends on @vue/composition-api

Installation

npm install @ryanwang520/vue-query

Usage

<template>
  <div>
    <div v-if="error">error!</div>
    <div v-else-if="loading">...loading</div>
    <pre v-else>{{ JSON.stringify(data) }}</pre>
  </div>
</template>

<script>
import { createComponent } from '@vue/composition-api';
import { useQuery } from '@ryanwang520/vue-query';

export default createComponent({
  setup() {
    const fetcher = name =>
      fetch(`https://api.github.com/users/${name}`).then(res => res.json());
    return useQuery(name, fetcher);
  },
});
</script>

If first argument of useQuery is a function, the result of this function will be passed to fetcher function, and this query will be reactive. You can think of this argument as the getter passed to computed.

<template>
  <div>
    <div v-if="error">error!</div>
    <div v-else-if="loading">...loading</div>
    <pre v-else>{{ JSON.stringify(data) }}</pre>
  </div>
</template>
<script>
export default {
  setup(props, context) {
    const fetcher = ({ path, params }) => {
      return fetch(
        `https://api.github.com/${path}?page=${params.page}`
      ).then(res => res.json());
    };
    return useQuery(
      () => ({
        path: '/users',
        params: { page: context.root.$route.query.page },
      }),
      fetcher
    );
  },
};

// if we change route, fetcher will be called again
$route.query.page = 2;

// fetcher({'/users', {page: 2}})
</script>

When route changes page, as route is reactive, a new request would be fired to fetch users of this new page

Array Keys

When a query needs more information to uniquely describe its data, you can use an array to describe it, and it will be destructed as argumets to fetcher function.

const fetcher = (a, b) => Promise.resolve(a, b);
useQuery(['a', 'b'], fetcher);

If the first argument is a function which returns an array, this query will be reactive.

const fetcher = (a, b) => Promise.resolve(a, b);

import { reactive } from '@vue/composition-api';
var params = reactive({ page: 1, per_page: 10 });

const fetcher = (page, per_page) => Promise.resolve(page, per_page);

useQuery(() => [params.page, params.per_page], fetcher);

Query config

Fetch success callback.

import { createComponent } from '@vue/composition-api';
import { useQuery } from '@ryanwang520/vue-query';

export default createComponent({
  setup() {
    const fetcher = name =>
      fetch(`https://api.github.com/users/${name}`).then(res => res.json());
    return useQuery(name, fetcher, {
      success() {
        console.log('fetch success');
      },
    });
  },
});

Conditionally fetch data, condition can be a Ref or normal tracking function.

import { createComponent } from '@vue/composition-api';
import { useQuery } from '@ryanwang520/vue-query';

export default createComponent({
  setup() {
    condition = ref(false);
    const fetcher = name =>
      fetch(`https://api.github.com/users/${name}`).then(res => res.json());

    setTimeout(() => {
      condition.value = true; // only fetch if condition is set to true
    }, 1000);
    return useQuery(name, fetcher, {
      enabled: condition,
    });
  },
});

Related

• @vue/composition-api
• vue-demi

License

MIT