Find a CSS property in the page

findCssProperty.js

/**
 * Copy this function in the browser console then start using.
 * 
 * Examples:
 * 
 * findCssProperty('background-image')
 *  --> log into the console all the background-images used
 * 
 * findCssProperty('font-family', 'Roboto')
 *  --> log into the console all elements that have a background that contains the string "Roboto"
 * 
 * findCssProperty('font-weight', 'bold', true)
 *  --> same but in strict mode, the property must exactly be 'bold'
 * 
 */

function findCssProperty(property, contains, strict) {
    var elements = document.getElementsByTagName('*');
    Array.prototype.forEach.call(elements, function(element) {
        var value = window.getComputedStyle(element, null).getPropertyValue(property);

        if (contains) {
            if (strict) {
                if (value === contains) {
                    console.log(element);
                }
            } else {
                if (value.indexOf(contains) >= 0) {
                    console.log(element);
                }
            }
        } else {
            console.log(value);
        }
    });
}