update tag_database, update httpPost

snippets/httpPost.md

@@ -4,16 +4,15 @@ Makes a `POST` request to the passed URL.
 
 Use `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 running the provided `callback` function.
+Handle the `onload` event, by console logging the `responseText`.
 Handle the `onerror` event, by running the provided `err` function.
-Omit the last argument, `err` to log the request to the console's error stream by default.
 
 ```js
-const httpPost = (url, data, callback, err = console.error) => {
+const httpPost = (url, data, 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);
+    request.onload = () => console.log(request.responseText);
     request.onerror = () => err(request);
     request.send(data);
 };
@@ -27,5 +26,5 @@ const user = {
 const data = JSON.stringify(user);
 httpPost('https://website.com/posts', data, request => {
   console.log(request.responseText);
-}); // 'Makes a new instance of user in database'
+}); // ''
 ```