Add Styles to Console Statements
I was recently checking out Google Plus because they implement some awesome effects. I opened the console and same the following message:
WARNING!
Using this console may allow attackers to impersonate you and steal your information using an attack called Self-XSS.
Do not enter or paste code that you do not understand.
I wasn't surprised to see that message but what I did notice was that the text was red and the background was yellow. The text was even a bit bigger. How did they do it? Pretty easily:
console.log("%c%s",
"color: red; background: yellow; font-size: 24px;",
"WARNING!");
The first argument is the order of style and message, the second is the style set, and the last is the desired message.
As to why you'd want to use this? If it helps you identify debug information easier in the console, you may consider calling more attention to some messages!
![Vibration API]()
Many of the new APIs provided to us by browser vendors are more targeted toward the mobile user than the desktop user. One of those simple APIs the Vibration API. The Vibration API allows developers to direct the device, using JavaScript, to vibrate in...
![Creating Scrolling Parallax Effects with CSS]()
Introduction
For quite a long time now websites with the so called "parallax" effect have been really popular.
In case you have not heard of this effect, it basically includes different layers of images that are moving in different directions or with different speed. This leads to a...
![From Webcam to Animated GIF: the Secret Behind chat.meatspac.es!]()
My team mate Edna Piranha is not only an awesome hacker; she's also a fantastic philosopher! Communication and online interactions is a subject that has kept her mind busy for a long time, and it has also resulted in a bunch of interesting experimental projects...
![Use Custom Missing Image Graphics Using Dojo]()
A few months back I posted an article about how you can use your own "missing image" graphics when an image fails to load using MooTools and jQuery. Here's how to do the same using Dojo.
The HTML
We'll delegate the image to display by class...
Easy, if one controls the browser and therefor the console, that has to display this ;) But Firefox supports this as well, and only IE prints both, the format string as the string itself 1:1 into F12.
There’s a JS library that makes styling comments much easier:
https://github.com/astoilkov/console.message
By replacing your formatting placeholders with
%c%o, it will output a readable repr for any type of object you pass in, not just the str value.https://jsfiddle.net/jsatt/Lta6p2jz/2/
very cool advice! my console is very colour ;)
With some trickery you can inject images too!
console.log("%cDuckie.TV", "color:transparent; font-size: 16pt; line-height: 125px; padding:25px; padding-top:30px; padding-bottom:60px; background-image:url(http://duckietv.github.io/DuckieTV/img/icon128.png); background-repeat:no-repeat; ", "quack!\n\n\n\n\n\n");I find it amusing that this post starts with an example of a warning not to copy & paste code into the console, and ends with me wanting to copy & paste code from people’s comments into the console.
But it’s okay, cause I sort of understand it, right?
I like to put an object at the top of my script when I am developing to create a shortcut for styling my logs:
// for styling console.log // EXAMPLE: console.log(sty.sty, sty.red, 'thingToLog:' ,+ foo); var sty = { sty: '%c%s', grn: 'background:#9c9;color:#141;padding:.25em;line-height:1.5em;', ylw: 'background:#ff0;color:#993;padding:.25em;line-height:1.5em;', red: 'background:#c99;color:#411;padding:.25em;line-height:1.5em;', org: 'background:#da0;color:#830;padding:.25em;line-height:1.5em;', gry: 'background:#666;color:#fff;padding:.25em;line-height:1.5em;', prp: 'background:#97e;color:#405;padding:.25em;line-height:1.5em;', blu: 'background:#8ac;color:#036;padding:.25em;line-height:1.5em;' };