Val Town Code SearchReturn to Val Town

1export function pipe<T>(seed: T) {
2  return (...ops: Array<(state: T) => T>) =>
3    ops.reduce((state, action) => action(state), seed);

1import { moveBody } from "https://esm.town/v/adamgonda/moveBody";
2
3export function moveSnake(state) {
4  const { snake } = state;
5  return {

1import { fetch } from "https://esm.town/v/std/fetch";
2
3export async function postHogAPICapture({ key, event, properties, distinct_id }: {
4  key: string;
5  event: string;

3export let fetchJSON = async (url: string, options?: any) => {
4  //url must return a JSON in string form
5  //this function parses that string into a javascript object
6  let f = await fetch(url, {
7    ...options,

1export function myApi(name) {
2  return "hi " + name;
3}

3// not working yet, didn't manage to affect dynamic value to @me.__state
4
5export const state = function (
6  id: string,
7  defaultValue: { [key: string]: any }
18  return [
19    __state[id],
20    function (newState) {
21      const newStore = {
22        ...__state,

22
23```js
24function updateFeedback(ref) {
25  let feedback = [...document.getElementsByTagName('a')].find(e => e.innerText == 'Feedback')
26  feedback.setAttribute('href', "https://stevekrouse-docfeedbackform.web.val.run/?ref=" + ref)
30```
31
32Finally, you may be wondering why I queue up feedback in `@stevekrouse.docsFeedback`, a private JSON val, and then process it via [`@stevekrouse.formFeedbackAlert`](https://www.val.town/v/stevekrouse.formFeedbackAlert) instead of sending it along to Discord directly in this val. I [tried that originally](https://www.val.town/v/stevekrouse.docFeedbackForm?v=61) but it felt too slow to wait for the API call to Discord before returning the "Thanks for your feedback" message. This is where the `context.waitUntil` method (that Cloudflare workers and Vercel Edge Functions support) would really come in handy – those allow you to return a Response, and then continue to compute. Currently Val Town requires you to stop all compute with the returning of your Response, so the only way to compute afterwards is to queue it up for another val to take over, and that's what I'm doing here.
33
34

3The Javascript [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) is directly available within a Val. However sometimes fetch calls are blocked by the receiving server for using particular IP addresses. Additionally, network blips or unreliable web services may lead to failures if not handled properly.
4
5The Val Town standard library contains an alternative version, [`std/fetch`](https://www.val.town/v/std/fetch), that wraps the JavaScript Fetch API to provide additional functionality. The fetch function from [`std/fetch`](https://www.val.town/v/std/fetch) reroutes requests using a proxy vendor so that requests obtain different IP addresses. It also automatically retries failed requests several times. Note that using [`std/fetch`](https://www.val.town/v/std/fetch) will be significantly slower than directly calling the Javascript Fetch API due to extra network hops.
6
7## Usage

22
23```js
24function updateFeedback(ref) {
25  let feedback = [...document.getElementsByTagName('a')].find(e => e.innerText == 'Feedback')
26  feedback.setAttribute('href', "https://stevekrouse-docfeedbackform.web.val.run/?ref=" + ref)
30```
31
32Finally, you may be wondering why I queue up feedback in `@stevekrouse.docsFeedback`, a private JSON val, and then process it via [`@stevekrouse.formFeedbackAlert`](https://www.val.town/v/stevekrouse.formFeedbackAlert) instead of sending it along to Discord directly in this val. I [tried that originally](https://www.val.town/v/stevekrouse.docFeedbackForm?v=61) but it felt too slow to wait for the API call to Discord before returning the "Thanks for your feedback" message. This is where the `context.waitUntil` method (that Cloudflare workers and Vercel Edge Functions support) would really come in handy – those allow you to return a Response, and then continue to compute. Currently Val Town requires you to stop all compute with the returning of your Response, so the only way to compute afterwards is to queue it up for another val to take over, and that's what I'm doing here.
33
34

15There will be one migration per val, per version.
16
17You can do anything you want in the function passed to `migrate`; create or alter tables, populate data... whatever!
18
19## Migrating backwards