asdf

bla.js

$(function () {
});

function handler () {
    var d = 5;
    console.info('I was clicked');

    backgroundColorer(buttonEl);
}

var buttonEl = $('button');
buttonEl.click(handler);

function backgroundColorer(jQueryElementOrSelectorOrFunction) {
    var normalizedAsJqueryElement;

    if (typeof jQueryElementOrSelectorOrFunction === 'function') {
        jQueryElementOrSelectorOrFunction = jQueryElementOrSelectorOrFunction();
    } 

    if (typeof jQueryElementOrSelector === 'object') {
        normalizedAsJqueryElement = jQueryElementOrSelectorOrFunction;
    } else {
        normalizedAsJqueryElement = $(jQueryElementOrSelector);
    }
    normalizedAsJqueryElement.css('background-color', 'yellow');
}

// var obj = {
//     value: 3,
//     logValueIn1Second: function() {
//         var that = this;
//         console.info('value now', that.value);
//         setTimeout(function () {
//             console.info('value later', that.value);
//         }, 500);
//     },
// };

// obj.logValueIn1Second();


var someValue = 4;
function myFunc () {
    var someValue = 5;
    console.info('someValue', someValue);
}

console.info('someValue', someValue);
myFunc();
console.info('someValue', someValue);