Merge pull request #514 from Chalarangelo/XMLHttpRequest

[FEATURE] http requests snippets

snippets/httpGet.md

@@ -0,0 +1,29 @@
+### httpGet
+
+Makes a `GET` request to the passed URL.
+
+Use [`XMLHttpRequest`](https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest) web api to make a `get` request to the given `url`.
+Handle the `onload` event, by calling the given `callback` the `responseText`.
+Handle the `onerror` event, by running the provided `err` function.
+Omit the third argument, `err`, to log errors to the console's `error` stream by default.
+
+```js
+const httpGet = (url, callback, err = console.error) => {
+  const request = new XMLHttpRequest();
+  request.open("GET", url, true);
+  request.onload = () => callback(request.responseText);
+  request.onerror = () => err(request);
+  request.send();
+};
+```
+
+```js
+httpGet('https://jsonplaceholder.typicode.com/posts/1', console.log); /* 
+Logs: {
+  "userId": 1,
+  "id": 1,
+  "title": "sunt aut facere repellat provident occaecati excepturi optio reprehenderit",
+  "body": "quia et suscipit\nsuscipit recusandae consequuntur expedita et cum\nreprehenderit molestiae ut ut quas totam\nnostrum rerum est autem sunt rem eveniet architecto"
+}
+*/
+```

snippets/httpPost.md

@@ -0,0 +1,39 @@
+### httpPost
+
+Makes a `POST` request to the passed URL.
+
+Use [`XMLHttpRequest`](https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest) web api to make a `post` request to the given `url`.
+Set the value of an `HTTP` request header with `setRequestHeader` method.
+Handle the `onload` event, by calling the given `callback` the `responseText`.
+Handle the `onerror` event, by running the provided `err` function.
+Omit the third argument, `data`, to send no data to the provided `url`.
+Omit the fourth argument, `err`, to log errors to the console's `error` stream by default.
+
+```js
+const httpPost = (url, callback, data = null, err = console.error) => {
+    const request = new XMLHttpRequest();
+    request.open("POST", url, true);
+    request.setRequestHeader('Content-type','application/json; charset=utf-8');
+    request.onload = () => callback(request.responseText);
+    request.onerror = () => err(request);
+    request.send(data);
+};
+```
+
+```js
+const newPost = {
+  "userId": 1,
+  "id": 1337,
+  "title": "Foo",
+  "body": "bar bar bar"
+};
+const data = JSON.stringify(newPost);
+httpPost('https://jsonplaceholder.typicode.com/posts', console.log, data; /*
+Logs: {
+  "userId": 1,
+  "id": 1337,
+  "title": "Foo",
+  "body": "bar bar bar"
+}
+*/
+```