Mixing fonts inside any design can be a ‘dangerous’ idea. If the fonts are too similar then the viewer will feel confused, but if the fonts are too different then it will make viewer feel multiple emotions that fight against one another. A safer idea is to stick to one font/theme and add a graphic or a few different colors that reinforces the brand’s singular idea.
In traditional JavaScript coding, if you want to get any information from a database or a file on the server, or send user information to a server, you will have to make an HTML form and GET or POST data to the server. The user will have to click the “Submit” button to send/get the information, wait for the server to respond, and then a new page will load with the results. Because