Remove contractions and possessives (#71)

sindresorhus · Jan 28, 2023 · 48a9112 · 48a9112
1 parent fe4d089
commit 48a9112
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diff --git a/index.js b/index.js
@@ -60,6 +60,11 @@ export default function slugify(string, options) {
 
 	string = string.replace(patternSlug, options.separator);
 	string = string.replace(/\\/g, '');
+
+	// Detect contractions/possessives by looking for any word followed by a `-t`
+	// or `-s` in isolation and then remove it.
+	string = string.replace(/([a-zA-Z\d]+)-([ts])(-|$)/g, '$1$2$3');
+
 	if (options.separator) {
 		string = removeMootSeparators(string, options.separator);
 	}

diff --git a/test.js b/test.js
@@ -29,6 +29,13 @@ test('main', t => {
 	t.is(slugify('Util APIs'), 'util-apis');
 });
 
+test('possessives and contractions', t => {
+	t.is(slugify('Conway\'s Law'), 'conways-law');
+	t.is(slugify('Conway\'s'), 'conways');
+	t.is(slugify('Don\'t Repeat Yourself'), 'dont-repeat-yourself');
+	t.is(slugify('my parents\' rules'), 'my-parents-rules');
+});
+
 test('custom separator', t => {
 	t.is(slugify('foo bar', {separator: '_'}), 'foo_bar');
 	t.is(slugify('aaa bbb', {separator: ''}), 'aaabbb');