sinceHow.js

/*sinceHow

@Author Simone Luise
@Mail me@simoneluise.com

A simple function to calcunate how much time has elapsed since a date.
The funcion have only one attribute: "time".

Time must be a valid string for generate a new Data() object. Like:

. "2013-11-08T09:23:35.000Z"  - formatted date
. 1383902615000               - millisecond date
. ecc...
*/
var sinceHow = function (time) {
    var tmpl, div;
    var diff = new Date() - new Date(time);
    /* *1 yeaer, mouth, day, hour, minute, in millisecond (you can add other time step, but go to commento *2) */
    var tMilli = [31104000000, 2592000000, 86400000, 3600000, 60000, 0];
    /* *2 array of array with function response text, the array index is relatives to the same index in tMilli array, each item is an array because you can use singolar or plural, {{NUMBER}} is a placeholder that will be replace for number*/
    var tplMilli = [
        ["a year ago", "{{NUMERO}} years ago"],
        ["About a month ago", "{{NUMERO}} About a month ago"],
        ["About a day ago", "{{NUMERO}} days ago"],
        ["About an hour ago", "{{NUMERO}} hours ago"],
        ["About a minute ago", "{{NUMERO}} minutes ago"],
        ["In this moment", "A few seconds ago"]
    ];
    /* Function for generate and populate the template */
    var basicTmpl = function (data, tmpl) {
        var regexp;

        for (placeholder in data) {
            regexp = new RegExp('{{' + placeholder + '}}', 'g');
            tmpl = tmpl.replace(regexp, data[placeholder]);
        }

        return tmpl;
    }
    for (var k in tMilli) {
        if (diff >= tMilli[k]) {
            div = diff / tMilli[k];
            tmpl = (div < 2) ? tplMilli[k][0] : tplMilli[k][1];
            return this.basicTmpl({
                NUMERO: parseInt(div)
            }, tmpl);
        }
    }
}

sinceHow.min.js

/* @Author Simone Luise - me@simoneluise.com */
var sinceHow=function(e){var t,n;var r=new Date-new Date(e);var i=[31104000000, 2592000000, 86400000, 3600000, 60000, 0];var s=[["a year ago","{{NUMERO}} years ago"],["About a month ago","{{NUMERO}} About a month ago"],["About a day ago","{{NUMERO}} days ago"],["About an hour ago","{{NUMERO}} hours ago"],["About a minute ago","{{NUMERO}} minutes ago"],["In this moment","A few seconds ago"]];var o=function(e,t){var n;for(placeholder in e){n=new RegExp("{{"+placeholder+"}}","g");t=t.replace(n,e[placeholder])}return t};for(var u in i){if(r>=i[u]){n=r/i[u];t=n<2?s[u][0]:s[u][1];return this.basicTmpl({NUMERO:parseInt(n)},t)}}}