FEAT: boolean type accepts an empty string as true

Author: scottenock

base.js

@@ -309,6 +309,10 @@ function parseValue(value, options, type) {
 		return type(value);
 	}
 
+	if (type === 'boolean' && value === null) {
+		return true;
+	}
+
 	if (type === 'boolean' && value !== null && (value.toLowerCase() === 'true' || value.toLowerCase() === 'false')) {
 		return value.toLowerCase() === 'true';
 	}

test/parse.js

@@ -592,3 +592,19 @@ test('types option: boolean type accepts 1 and 0 as boolean values', t => {
 		b: false,
 	});
 });
+
+test('types option: boolean type accepts an empty string as true', t => {
+	t.deepEqual(
+		queryString.parse('a&b', {
+			parsebooleans: false,
+			types: {
+				a: 'boolean',
+				b: 'boolean',
+			},
+		}),
+		{
+			a: true,
+			b: true,
+		},
+	);
+});