Make a HTTP request

How to use the fetch() api from AS.

Installation

~ npm install as-fetch

Usage

Add --exportTable --exportRuntime flag

JavaScript

+ const FetchImport = require("as-fetch/imports")
+ const Fetch = new FetchImport()
const imports = {
+  ...Fetch.wasmImports,
}
const wasmModule = loader.instantiateSync(...)
+ Fetch.wasmExports = wasmModule.exports

AssemblyScript

import { fetch } from 'as-fetch'

fetch("https://example.com/get", {
  method: "GET",
  mode: "no-cors",
  headers: [],
}).then((response) => {
  const text = response.text();
  console.log("Response: " + text);
});

Performance

When as-fetch is used in the browser, it used the native fetch() which is extremely slow. However, in NodeJS it relies on cross-fetch or undici-fetch. Undici fetch is the fastest by far.

• Browser Fetch (Slowest)

• Cross-Fetch (Fast)

• Undici-Fetch (Fastest)