jquery.animateNumber.js
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/** @preserve jQuery animateNumber plugin v0.0.10
* (c) 2013, Alexandr Borisov.
* https://github.com/aishek/jquery-animateNumber
*/
// ['...'] notation using to avoid names minification by Google Closure Compiler
(function ($) {
var reverse = function (value) {
return value.split('').reverse().join('');
};
var defaults = {
numberStep: function (now, tween) {
var floored_number = Math.floor(now),
target = $(tween.elem);
target.text(floored_number);
}
};
var handle = function (tween) {
var elem = tween.elem;
if (elem.nodeType && elem.parentNode) {
var handler = elem._animateNumberSetter;
if (!handler) {
handler = defaults.numberStep;
}
handler(tween.now, tween);
}
};
if (!$.Tween || !$.Tween.propHooks) {
$.fx.step.number = handle;
} else {
$.Tween.propHooks.number = {
set: handle
};
}
var extract_number_parts = function (separated_number, group_length) {
var numbers = separated_number.split('').reverse(),
number_parts = [],
current_number_part,
current_index,
q;
for (var i = 0, l = Math.ceil(separated_number.length / group_length); i < l; i++) {
current_number_part = '';
for (q = 0; q < group_length; q++) {
current_index = i * group_length + q;
if (current_index === separated_number.length) {
break;
}
current_number_part = current_number_part + numbers[current_index];
}
number_parts.push(current_number_part);
}
return number_parts;
};
var remove_precending_zeros = function (number_parts) {
var last_index = number_parts.length - 1,
last = reverse(number_parts[last_index]);
number_parts[last_index] = reverse(parseInt(last, 10).toString());
return number_parts;
};
$.animateNumber = {
numberStepFactories: {
/**
* Creates numberStep handler, which appends string to floored animated number on each step.
*
* @example
* // will animate to 100 with "1 %", "2 %", "3 %", ...
* $('#someid').animateNumber({
* number: 100,
* numberStep: $.animateNumber.numberStepFactories.append(' %')
* });
*
* @params {String} suffix string to append to animated number
* @returns {Function} numberStep-compatible function for use in animateNumber's parameters
*/
append: function (suffix) {
return function (now, tween) {
var floored_number = Math.floor(now),
target = $(tween.elem);
target.prop('number', now).text(floored_number + suffix);
};
},
/**
* Creates numberStep handler, which format floored numbers by separating them to groups.
*
* @example
* // will animate with 1 ... 217,980 ... 95,217,980 ... 7,095,217,980
* $('#world-population').animateNumber({
* number: 7095217980,
* numberStep: $.animateNumber.numberStepFactories.separator(',')
* });
*
* @params {String} [separator=' '] string to separate number groups
* @params {String} [group_length=3] number group length
* @returns {Function} numberStep-compatible function for use in animateNumber's parameters
*/
separator: function (separator, group_length) {
separator = separator || ' ';
group_length = group_length || 3;
return function (now, tween) {
var floored_number = Math.floor(now),
separated_number = floored_number.toString(),
target = $(tween.elem);
if (separated_number.length > group_length) {
var number_parts = extract_number_parts(separated_number, group_length);
separated_number = remove_precending_zeros(number_parts).join(separator);
separated_number = reverse(separated_number);
}
target.prop('number', now).text(separated_number);
};
}
}
};
$.fn.animateNumber = function () {
var options = arguments[0],
settings = $.extend({}, defaults, options),
target = $(this),
args = [settings];
for (var i = 1, l = arguments.length; i < l; i++) {
args.push(arguments[i]);
}
// needs of custom step function usage
if (options.numberStep) {
// assigns custom step functions
var items = this.each(function () {
this._animateNumberSetter = options.numberStep;
});
// cleanup of custom step functions after animation
var generic_complete = settings.complete;
settings.complete = function () {
items.each(function () {
delete this._animateNumberSetter;
});
if (generic_complete) {
generic_complete.apply(this, arguments);
}
};
}
return target.animate.apply(target, args);
};
}(jQuery));