Completed chrome.md file

Author: anosidium

Sprint-1/4-stretch-explore/chrome.md

@@ -12,7 +12,18 @@ invoke the function `alert` with an input string of `"Hello world!"`;
 
 What effect does calling the `alert` function have?
 
+It displays an alert saying:
+
+chrome://new-tab-page says
+
+Hello world!
+
 Now try invoking the function `prompt` with a string input of `"What is your name?"` - store the return value of your call to `prompt` in an variable called `myName`.
 
 What effect does calling the `prompt` function have?
+
+It displays an alert with a textfield where you can enter some text, e.g. John.
+
 What is the return value of `prompt`?
+
+The string returned from the textfield what the user has entered otherwise null.