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assets/js/round/round.js

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+function round (value, precision, mode) {
+  // http://kevin.vanzonneveld.net
+  // +   original by: Philip Peterson
+  // +    revised by: Onno Marsman
+  // +      input by: Greenseed
+  // +    revised by: T.Wild
+  // +      input by: meo
+  // +      input by: William
+  // +   bugfixed by: Brett Zamir (http://brett-zamir.me)
+  // +      input by: Josep Sanz (http://www.ws3.es/)
+  // +    revised by: Rafał Kukawski (http://blog.kukawski.pl/)
+  // %        note 1: Great work. Ideas for improvement:
+  // %        note 1:  - code more compliant with developer guidelines
+  // %        note 1:  - for implementing PHP constant arguments look at
+  // %        note 1:  the pathinfo() function, it offers the greatest
+  // %        note 1:  flexibility & compatibility possible
+  // *     example 1: round(1241757, -3);
+  // *     returns 1: 1242000
+  // *     example 2: round(3.6);
+  // *     returns 2: 4
+  // *     example 3: round(2.835, 2);
+  // *     returns 3: 2.84
+  // *     example 4: round(1.1749999999999, 2);
+  // *     returns 4: 1.17
+  // *     example 5: round(58551.799999999996, 2);
+  // *     returns 5: 58551.8
+  var m, f, isHalf, sgn; // helper variables
+  precision |= 0; // making sure precision is integer
+  m = Math.pow(10, precision);
+  value *= m;
+  sgn = (value > 0) | -(value < 0); // sign of the number
+  isHalf = value % 1 === 0.5 * sgn;
+  f = Math.floor(value);
+
+  if (isHalf) {
+    switch (mode) {
+      case '2':
+      case 'PHP_ROUND_HALF_DOWN':
+        value = f + (sgn < 0); // rounds .5 toward zero
+      break;
+      case '3':
+      case 'PHP_ROUND_HALF_EVEN':
+        value = f + (f % 2 * sgn); // rouds .5 towards the next even integer
+      break;
+      case '4':
+      case 'PHP_ROUND_HALF_ODD':
+        value = f + !(f % 2); // rounds .5 towards the next odd integer
+      break;
+      default:
+        value = f + (sgn > 0); // rounds .5 away from zero
+    }
+  }
+
+  return (isHalf ? value : Math.round(value)) / m;
+}

assets/js/round/round.min.js

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+function round(a,e,r){var _,c,s;if(e|=0,c=(a*=_=Math.pow(10,e))%1==.5*(s=0<a|-(a<0)),e=Math.floor(a),c)switch(r){case"2":case"PHP_ROUND_HALF_DOWN":a=e+(s<0);break;case"3":case"PHP_ROUND_HALF_EVEN":a=e+e%2*s;break;case"4":case"PHP_ROUND_HALF_ODD":a=e+!(e%2);break;default:a=e+(0<s)}return(c?a:Math.round(a))/_}