@urql/svelte，“调用外部组件初始化的函数"；如果不在 onMount

问题描述

我正在尝试 https://github.com/FormidableLabs/urql/tree/master/packages/svelte-urql 伙计们.

I'm trying the amazing works done by https://github.com/FormidableLabs/urql/tree/master/packages/svelte-urql guys.

一切正常，直到今天发行.

Everything works good until today issue.

我正在使用下面的代码，它给了我这个错误:

I'm using the below code and it gives me this error:

Error: Function called outside component initialization
  at get_current_component (index.mjs:615)
  at getContext (index.mjs:648)
  at getClient (urql-svelte.mjs:55)
  at query (urql-svelte.mjs:81)
  at Players.svelte:41

代码:

<script>
  import { query } from '@urql/svelte'
  import { myQuery } from './myQuery'

  let players
  let myVars

  function sleep (ms) {
    return new Promise((resolve) => setTimeout(resolve, ms))
  }

  $: (async () => {
    await sleep(2000) // this gives me the error; removing it make it work
    players = query({
      query: myQuery,
      variables: { ...myVars },
      requestPolicy: 'cache-and-network'
    })
  })()
</script>

{#if !players}
  Loading players...
{:else}
  Players loaded! Do the work.
{/if}

你能提出什么问题吗?

如果我在 onMount() 中使用 await() 它工作！像这样:

If I use await() in onMount() it works! Like this:

onMount(async () => {
  await sleep(2000)
  loaded = true
})

这里是@urql/svelte的代码:

1. query.ts:https://github.com/FormidableLabs/urql/blob/master/packages/svelte-urql/src/operations/query.ts
2. context.ts:https://github.com/FormidableLabs/urql/blob/master/packages/svelte-urql/src/context.ts

也许是 context 代码?

import { setContext, getContext } from 'svelte';
import { Client, ClientOptions } from '@urql/core';

const CLIENT = '$$_URQL';

export const getClient = (): Client => getContext(CLIENT);

export const setClient = (client: Client): void => {
  setContext(CLIENT, client);
};

export const initClient = (args: ClientOptions): Client => {
  const client = new Client(args);
  setClient(client);
  return client;
};

如果您需要，我可以在 CodeSandbox 上创建 REPL，没问题.

@urql/svelte 上的错误:https://github.com/FormidableLabs/urql/issues/795.

有关您的 Svelte 项目的信息:- 铬 83- 苗条版本:3.23.0- 汇总

Information about your Svelte project:- Chrome 83- Svelte version: 3.23.0- Rollup

推荐答案

我的情况有点不同，但得到了同样的错误.就我而言，为了开发目的，我试图让 Svelte/Sapper 在 Docker 容器中运行.在此之前我一直在摆弄 package.json 并且在某些时候我决定也将 svelte 和 sapper 移动到depedencies".而不是devDependencies".

My situation was a bit different, but got the same error. In my case, I was trying to get Svelte/Sapper running in a Docker container for development purposes. I was fiddling around with the package.json before this and at some point I decided too move svelte and sapper to "depedencies" instead of "devDependencies".

"dependencies": {
    // ...
    "sapper": "^0.27.0",
    "svelte": "^3.0.0"
}

这是个坏主意.一旦我将它移回devDependencies"，错误就消失了，一切都按预期进行.

This was a bad idea. Once I moved it back to "devDependencies", the error went away and everything worked as expected.

"devDependencies": {
    // ...
    "sapper": "^0.27.0",
    "svelte": "^3.0.0"
}

我希望这能帮助某人.

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