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Fixed const reassignment problem with custom keywords #5

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Fixed const reassignment problem with custom keywords #5

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4 changes: 2 additions & 2 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -9,9 +9,9 @@

function falsey(val, keywords) {
if (!val) return true;
const words = keywords || falsey.keywords;
let words = keywords || falsey.keywords;
if (!Array.isArray(words)) words = [words];
const lower = typeof val === 'string' ? val.toLowerCase() : null;
const lower = typeof val === 'string' ? val.trim().toLowerCase() : null;
for (const word of words) {
if (word === val) {
return true;
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9 changes: 9 additions & 0 deletions test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -15,20 +15,26 @@ describe('falsey', function() {
it('should return false when truthy', function() {
assert(!falsey('1'));
assert(!falsey(1));
assert(!falsey([]));
assert(!falsey([0]));
assert(!falsey(true));
assert(!falsey('true'));
assert(!falsey({}));
assert(!falsey({a: 'b'}));
assert(!falsey(Infinity))
});

it('should return true when falsey', function() {
assert(falsey(''));
assert(falsey('false'));
assert(falsey(' false '));
assert(falsey('0'));
assert(falsey(0));
assert(falsey(false));
assert(falsey(NaN));
assert(falsey(null));
assert(falsey(undefined));
assert(falsey());
});

it('should return "falsey" for `nil`', function() {
Expand Down Expand Up @@ -57,6 +63,9 @@ describe('falsey', function() {
});

it('should support custom "falsey" values', function() {
assert(falsey('nil', undefined));
assert(falsey('nil', null));
assert(falsey('nil', false));
assert(!falsey('nil', []));
assert(!falsey('none', []));
assert(falsey('foo', ['foo', 'bar', 'baz']));
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