Format console messages

You can use special formatters in the console.log function to format logs just the way you want.

• Use %s to format a variable as a string.
• Use %d to format a variable as an integer.
• Use %f to format a variable as a float.
• Use %o to print a DOM element variable.
• Use %O to print an object variable.

As a bonus, the %c formatter can also be used to style console messages with CSS properties!

var el = document.body;
console.log('%c There are %d elements in %O', 'color:lime;background:black;', el.childElementCount, el);