Fix formatting of small floating point number

Based on adamwdraper#564
StarfishStorage · Jan 29, 2024 · 4a26dbc · 4a26dbc
1 parent 7de892f
commit 4a26dbc
Show file tree

Hide file tree

Showing 2 changed files with 6 additions and 2 deletions.
diff --git a/src/numeral.js b/src/numeral.js
@@ -395,7 +395,8 @@
             power = Math.pow(10, boundedPrecision);
 
             // Multiply up by precision, round accurately, then divide and use native toFixed():
-            output = (roundingFunction(value + 'e+' + boundedPrecision) / power).toFixed(boundedPrecision);
+            var valueToRound = value.toString().indexOf('e') >= 0 ? (value  *  power) : (value + 'e+' + boundedPrecision);
+            output = (roundingFunction(valueToRound) / power).toFixed(boundedPrecision);
 
             if (optionals > maxDecimals - boundedPrecision) {
                 optionalsRegExp = new RegExp('\\.?0{1,' + (optionals - (maxDecimals - boundedPrecision)) + '}$');

diff --git a/tests/numeral.js b/tests/numeral.js
@@ -193,7 +193,10 @@ describe('Numeral', function() {
                     [-5444333222111, '0,0 ab', '-5,444 b'],
                     [-5444333222111, '0,0 at', '-5 t'],
                     [123456, '0.0[0] ak', '123.46 k'],
-                    [150,'0.0 ak','0.2 k']
+                    [150,'0.0 ak','0.2 k'],
+                    // tiny floats
+                    [1e-8,'0,0.00000000','0.00000001'],
+                    [1e-8,'0,0.00','0.00']
                 ],
                 i,
                 n,