In the last months I have been working on a ticket designer to print on thermal printers by using ESC POS commands. The free ESC POS thermal printer designer is web-based and can be used to create your own invoices, whether sales receipt, sales invoice, purchase receipt and any other design to print on thermal […]
Receipt designer for thermal printers – Free and open source Read More »
In this post you will learn how to use the Origin Private File System with JavaScript to store, read and remove any file on the web browser. You may try the demo here: https://stackblitz.com/edit/vitejs-vite-hl34zf?file=index.html As I said before, the Origin Private File System has arrived to revolutionize things with JavaScript. Thanks to OPFS we can
JavaScript: store and read files with the Origin Private File System Read More »
In Svelte we can define functions that are going to be called when an event is triggered. For example, to call holaMundo on the click of an element we can indicate it as on:click={holaMundo} Sometimes it is necessary to pass parameters to that function inside a Svelte component, but we cannot indicate it like this:
Passing parameters to Svelte function Read More »
Today I am going to present you a plugin that I have just created. It is a plugin to print a PDF file silently, that is, without asking the user for confirmation. This plugin exposes a REST API so that a PDF can be printed without confirmation using JavaScript. Just make an HTTP GET request
Silent PDF Print with JavaScript and plugin Read More »
In this post I will show you how to enable CORS (Cross Origin Resource sharing) so that you can make HTTP requests from a different domain than the one you use for your Flask application written in Python. We will just add a kind of middleware to modify all the responses and add the headers
Enable CORS in Flask app Read More »