Added ignoreEmptyArrays option.

form-urlencoded.d.ts

@@ -8,6 +8,7 @@ declare namespace formUrlEncoded {
         sorted?: boolean;
         skipIndex?: boolean;
         ignorenull?: boolean;
+        ignoreEmptyArrays?: boolean;
         skipBracket?: boolean,
         useDot?: boolean
         whitespace?: string

form-urlencoded.mjs

@@ -1,6 +1,6 @@
 export default (data, opts = {}) => {
   const {
-    sorted, skipIndex, ignorenull, skipBracket, useDot, whitespace = '+'
+    sorted, skipIndex, ignorenull, ignoreEmptyArrays, skipBracket, useDot, whitespace = '+'
   } = opts;
 
   const encode = value => String(value)
@@ -22,7 +22,7 @@
     ? filterjoin(arr.map((elem, index) => skipIndex
       ? nest(name + brackets, elem)
       : nest(name + '[' + index + ']', elem)))
-    : encode(name + brackets);
+    : !ignoreEmptyArrays && encode(name + brackets);
 
   const setnest = (name, set) => filterjoin(
     Array.from(set).map(elem => nest(name, elem)));

form-urlencoded.spec.mjs

@@ -132,6 +132,22 @@ test('return encoded data, without null', t => t.is(
   'propArr1%5B2%5D=1'
 ));
 
+test('return encoded data, with empty arrays', t => t.is(
+  formurlencoded({
+    propArr1 : [ 1, 2, 3 ],
+    propArr2 : []
+  }),
+  'propArr1%5B0%5D=1&propArr1%5B1%5D=2&propArr1%5B2%5D=3&propArr2%5B%5D'
+));
+
+test('return encoded data, without empty arrays', t => t.is(
+  formurlencoded({
+    propArr1 : [ 1, 2, 3 ],
+    propArr2 : []
+  }, { ignoreEmptyArrays : true }),
+  'propArr1%5B0%5D=1&propArr1%5B1%5D=2&propArr1%5B2%5D=3'
+));
+
 test('return encoded set', t => t.is(
   formurlencoded({
     set : new Set([ 1, 'two' ])