Don't encode the fragment identifier in .pick and .exclude (#320)

index.js

@@ -6,6 +6,8 @@ const filterObject = require('filter-obj');
 
 const isNullOrUndefined = value => value === null || value === undefined;
 
+const encodeFragmentIdentifier = Symbol('encodeFragmentIdentifier');
+
 function encoderForArrayFormat(options) {
 	switch (options.arrayFormat) {
 		case 'index':
@@ -402,7 +404,8 @@ exports.parseUrl = (url, options) => {
 exports.stringifyUrl = (object, options) => {
 	options = Object.assign({
 		encode: true,
-		strict: true
+		strict: true,
+		[encodeFragmentIdentifier]: true
 	}, options);
 
 	const url = removeHash(object.url).split('?')[0] || '';
@@ -417,15 +420,16 @@ exports.stringifyUrl = (object, options) => {
 
 	let hash = getHash(object.url);
 	if (object.fragmentIdentifier) {
-		hash = `#${encode(object.fragmentIdentifier, options)}`;
+		hash = `#${options[encodeFragmentIdentifier] ? encode(object.fragmentIdentifier, options) : object.fragmentIdentifier}`;
 	}
 
 	return `${url}${queryString}${hash}`;
 };
 
 exports.pick = (input, filter, options) => {
 	options = Object.assign({
-		parseFragmentIdentifier: true
+		parseFragmentIdentifier: true,
+		[encodeFragmentIdentifier]: false
 	}, options);
 
 	const {url, query, fragmentIdentifier} = exports.parseUrl(input, options);

test/exclude.js

@@ -15,3 +15,7 @@ test('excludes elements in a URL with a filter predicate', t => {
 		parseNumbers: true
 	}), 'http://example.com/?b=2&c=3#a');
 });
+
+test('excludes elements in a URL without encoding fragment identifiers', t => {
+	t.is(queryString.exclude('https://example.com?a=b#/home', ['a']), 'https://example.com#/home');
+});

test/pick.js

@@ -15,3 +15,7 @@ test('picks elements in a URL with a filter predicate', t => {
 		parseNumbers: true
 	}), 'http://example.com/?a=1#a');
 });
+
+test('picks elements in a URL without encoding fragment identifiers', t => {
+	t.is(queryString.pick('https://example.com?a=b#/home', []), 'https://example.com#/home');
+});