The Author – Bart Busschots
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Sep
29
PBS 22 of X – jQuery Events
Filed Under Software Development, Computers & Tech on September 29, 2016 | 3 Comments
In the previous instalments we experimented with jQuery using the web console on our dummy page. In this instalment we’ll learn how to embed JavaScript into web pages, and, how to attach our code so it gets triggered by browser events.
This instalment includes a number of examples. You can copy-and-paste the code out of the page, but for convenience I’ve zipped up all the files and you can download them here.
Sep
15
PBS 21 of X – jQuery Basics
Filed Under Software Development, Computers & Tech on September 15, 2016 | 1 Comment
In the previous instalment we took our first tentative steps into the browser. We learned about the Javascript console, the concept of the Document Object Model, or DOM, and we introduced the jQuery library.
Our initial introduction to jQuery was very superficial, now, it’s time to dive in deeper, and get much more rigorous in our understanding. We’ll look at how to use jQuery to select specific HTML elements on the page, and then, how to manipulate their styling, and their HTML attributes.
For this instalment we’ll still be using the Javascript console on the PBS dummy page. From the next instalment on, we’ll be embedding our JavaScript directly into our web pages, so this will be the last time we use the dummy page.
Sep
1
PBS 20 of X – JS in the Browser
Filed Under Computers & Tech, Software Development on September 1, 2016 | 4 Comments
After six instalments, it’s finally time to bring our JavaScript knowledge into the web browser. We’ve already learned that HTML is used to specify the structure of a web page, and CSS to specify its appearance, so where does JavaScript come in? JavaScript’s primary use on the web is to add interactivity and/or automation of some kind. For example, clicking on something could cause the page to change in some way, or, icons could be automatically injected into the page to mark links that open in new tabs as being different to other links.
A key point to note is that HTML, CSS, and JavaScript are all so-called client-side technologies. It’s the web browser doing the work, not the web server. The web server simply delivers the HTML, CSS, and JavaScript code to the browser as text, just like you type it, and the browser then interprets that code and turns it into the web page you see and interact with.