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!
![Being a Dev Dad]()
I get asked loads of questions every day but I'm always surprised that they're rarely questions about code or even tech -- many of the questions I get are more about non-dev stuff like what my office is like, what software I use, and oftentimes...
![Write Simple, Elegant and Maintainable Media Queries with Sass]()
I spent a few months experimenting with different approaches for writing simple, elegant and maintainable media queries with Sass. Each solution had something that I really liked, but I couldn't find one that covered everything I needed to do, so I ventured into creating my...
![Geolocation API]()
One interesting aspect of web development is geolocation; where is your user viewing your website from? You can base your language locale on that data or show certain products in your store based on the user's location. Let's examine how you can...
![Create an Animated Sliding Button Using MooTools]()
Buttons (or links) are usually the elements on our sites that we want to draw a lot of attention to. Unfortunately many times they end up looking the most boring. You don't have to let that happen though! I recently found a...
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;' };