JS $.extend

$.extend.js

var defaults = {
    radius: 25,
    defaultradius: 0,
    enableTilt: true,
    tilt: 20,
    random: true,
    randomMax: 25,
    colors: ['4AC7ED', 'FDC015', '9F78EC', 'F25C33']
};

console.log(defaults.colors.length);
console.log('Default Value colors[0] = ' + defaults.colors[0]);

var options = $.extend(defaults, {
    enableTilt: false,
    colors: ['ffffff', '000000']
});

console.log(options.colors.length);
console.log('New Value colors[0] = ' + options.colors[0]);