Home computer use: security: Bitdefender Safepay

Using a PC can involve constant self-tutoring. The tutor shares his discovery of Bitdefender Safepay.

As I’ve come to understand, Bitdefender Safepay is a secure browser that can be invoked from the Bitdefender suite (I have, I believe, Bitdefender Total Security). The idea is that you can browse with Safepay (as opposed to your regular browser) for extra security.

While Bitdefender Safepay might mainly play to people doing transactions online, it can be used as a general-purpose browser. For sites you log into, like blogs or membership sites, (as well as, of course, transaction situations), it offers a virtual keyboard through which you can enter the credentials. Using the virtual keyboard protects against keyboard-monitoring malware.

I like Safepay as just a regular browser; I don’t do much in the way of transactions, but I do log into blogs, membership sites, etc.

HTH:)

Source:

pcworld.com

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Chrome: Developer tools (view page source): ==$0

The tutor talks about ==$zer0 in Chrome’s Developer tools.

Looking at a page source in Google Chrome, I saw the entry ==$0. It wasn’t manifesting on the page itself; I wondered if it was a type of HTML comment.

Apparently, ==$0 shows the element you’ve selected to inspect. Chrome itself prints it in the page source to help you find the line that produces the element you’ve chosen. It’s not content.

Source:

stackoverflow.com

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Web design: jQuery css() and JavaScript style: boundary testing

The tutor discusses what he noticed while experimenting with jQuery css() and JavaScript style.

JavaScript has a style function that allows you to access style attributes of an element. For example, to get an element’s color:

var e1_color=document.getElementById(“e1”).style.color;

However, as I understand, you’re not meant to harvest the entire style at once:

var e1_style=document.getElementById(“e1”).style; //not intended

Furthermore, let’s imagine you do so anyway, then try to convey that style to another element:

var e1_style=document.getElementById(“e1”).style;
document.getElementById(“e2”).style=e1_style;
//won’t work, according to my tests

Curiously, though, I’ve found that

var e1_style=document.getElementById(“e1”).style;
jQuery(“#e2”).css(e1_style);

does work on Chrome and Firefox (but not ie11).

It’s not a recommended way to change the style of an element, but it hints at how JavaScript and jQuery can have deeper communication than JavaScript with itself. It also reminds of the potential differences from browser to browser.

I’ll be talking more about JavaScript and jQuery in future posts:)

Source:

w3schools

Pollock, John. jQuery: A Beginner’s Guide. Toronto: McGraw-Hill, 2014.

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

JavaScript: output to the console

The tutor tests JavaScript code using the console.

I’ve long known about the JavaScript console, and use it sometimes for debugging. However, I didn’t know to use if for testing – until now.

In the past, I’d build a rudimentary web page around a JavaScript function, sending the output to a div using innerHTML. However, for checking continuity and logic, sending output to the console might be simpler. Testing it today, I’d just open Notepad, type

<script>

lines
of
code
to be
tested

console.log(Output you want to see);

</script>

then save the file as html and point the browser to it. Of course, at first, I’d just get a blank screen. F12 opens the developer tools, then clicking Console shows the output.

In the JavaScript code, the command

console.log(Output you want to see);

sends the output to the console. If for some reason there’s a problem, you know right away: that’s what the console is there to tell you. Therefore, it’s a great testing utility.

HTH:)

Source:

w3schools

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Web design: @keyframes

The tutor shows a trick available from CSS3.

@keyframes syntax is a way to invoke animations available in CSS3.


The @keyframes effect may not be visible in some earlier browser versions – like, possibly, ie9 or before. However, someone running XP, for example, can get Opera (which is what I have on my XP computer), then can hopefully view the effect.

Source:

w3schools

paulund.co.uk

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

Web browsers: Firefox: Show All History not quite working?

The tutor offers a way to view your history when it’s not showing.

I love Firefox; it’s the browser I use with my Linux (Ubuntu) computers.

Yesterday I clicked, at the top, History. A drop-down menu appeared, showing websites I had recently visited. “But are those all of them?” I wondered. From the drop-down, I chose the Show All History option. A window opened titled Library, but the page list was blank.

I repeated the exercise several times: after all, I thought, the Show All History option should show at least as much as the History drop-down. I even went online to research the situation: apparently, I wasn’t the only one facing it.

Eventually, I tried the search box in the Library window. By putting characters into it, I could cause pages to appear in the list. I decided the forward slash / to be best, since every page I’d been to had that in its address.

So, with Firefox, if pages aren’t showing up in the Show All History view, perhaps a solution is to type the forward slash into the search box there. I think, then, you’ll see the pages you’ve been to:)

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.