Free knowledge blog: linux, programming, open source, databases, android, frameworks, web and computing in general
A few days ago I did an exercise on a sales system in PHP. It is written in pure PHP, no Javascript. Mind you, for the styles I used a Bootstrap variant.
The files don’t have a structure, but like I said, it’s an example. I also write this because it either serves someone else or it serves myself for some references.
For data persistence it uses MySQL. This POS Save products and sales. It does not handle user permissions. We store the shopping cart in the session, and well, I better explain it in parts in this post.
Obviously this POS software is free and open source.
In this post I will show you the Tetris game programmed in pure JavaScript, totally free and open source.
This block game is programmed with JavaScript and uses canvas to paint the game. I also use Bootstrap for the layout of the buttons and the page in general, with a bit of SweetAlert for the alerts.
Although it seems simple to do, it is one of the jobs that has cost me the most and of which I am most proud. It was complex (for me) to understand all the logic for collisions, rotations, row deletion, part movement, limits, etc.
Among the features of the game we find:
Let’s see then the details of this game programmed in JS. Throughout the post I will show you how this game is programmed, I will also leave you a demo and the complete code which is FOSS.
Note: figure, piece and tetromino will be used synonymously in this post.
In this post I will show you how to print a ticket or receipt by using JavaScript (client side) and a thermal printer. At the end we will have a great ticket that looks like this:
Obviously you can change the font family, size, logo and so on. And remember: we will be using only pure CSS, HTML & JavaScript, no frameworks; though you can use any framework to render the content before printing.