promises

archive/promise/fetch.js

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+## Example: fetch
+
+
+## Example: fetch
+
+Promises are also returned by some built-in browser methods.
+
+For instance, [fetch](https://fetch.spec.whatwg.org/#fetch-method) allows to load arbitrary content over the network. We can use it to send information to the server and load data from it.
+
+The syntax is:
+
+```js
+let promise = fetch(url[, options]);
+```
+
+Here:
+- `url` is the URL to load,
+- `options` are various request options.
+
+There are many options, full information about them is in the [spec](https://fetch.spec.whatwg.org/#requestinit), here we won't need them.
+
+The promise returned by `fetch` resolves with the `response` object when the server responds.
+
+The most important properties of `response` are:
+- `status` -- HTTP-code: 200 for OK, 404 for "Page not found" etc.
+- `headers` -- HTTP headers.
+- 
+
+The important thing
+
+
+```js run
+fetch('/article/promise-chaining/1.html?speed=1')
+  .then(console.log);
+```
+
+