Tips & Tutorials

Welcome to a tutorial on how to disable the browser back functionality in Javascript. So the user has signed off, but is still able to access a cached version of the protected page by going back? Or you just want the user to stay on a page? I have compiled a list of solutions from […]

Welcome to a tutorial on how to read and write NFC tags in Javascript. Yes, you read that right. It is totally possible to work with NFC tags in web apps – Read on for the examples!     TABLE OF CONTENTS Javascript NFC Download & Notes Extra Bits & Links The End   JAVASCRIPT

Welcome to a beginner’s tutorial on Javascript loops and iterations. Want to loop through arrays and objects, or do things repetitively? The common mechanisms to loop and iterate in Javascript are: For for (let i=0; i<10; i++) { … } For-In for (let KEY in OBJECT/ARRAY/STRING) { … } For-Of for (let VALUE of ARRAY/STRING)

Welcome to a quick tutorial and example of how to perform a cross-origin fetch request in Javascript. Are you trying to do a fetch request to a different domain? Only to be denied with a “no Access-Control-Allow-Origin header is present” error? To perform a cross-origin fetch call: On the first site, do a fetch call

Welcome to a tutorial on how to get HTML table data in Javascript. So you want to extract values from an HTML table in Javascript? One of the easiest ways to get data from an HTML table is to select all the cells and loop through them: <table id=”demo”> var cells = document.querySelectorAll(“#demo td”); for

Welcome to a tutorial on how to send POST and GET without an HTML form in Javascript. So you want to send some data to the server in Javascript, but not involve the use of an HTML form? An easy way to do a GET request without an HTML form is to use a query

Welcome to a short tutorial on how to convert a string into an object in Javascript. Well, for a quick answer – The only native Javascript function to convert a string into an object is JSON.parse(). For example, var parsed = JSON.parse(‘{“foo”:”bar”}’). To convert strings of other formats, it has to be done manually. That

Welcome to a tutorial on how to create a simple pure Javascript Calendar. Are you looking to develop a calendar web app, without using any server-side scripts? Be it for a commercial project, school project, or just curiosity – You have come to the correct place. This guide will walk you through how to create

Welcome to a tutorial on synchronous and asynchronous Javascript. Dear code ninja, so you have finally stumbled on the topic of synchronous and asynchronous. Just what does that mean? What is the difference? Why is it important? Long story short: Javascript is synchronous “by default”. Meaning, the next line of code cannot run until the