Fix: Allow isolated components with duplicate names (fixes #1454)

If you have more than one component with the same name, the isolated mode will incorrectly show all of the components of the same name (instead of just the one you clicked on).

This fix solves the issue by prepending the existing hash path from the page the user came from. By prepending this hash path, Styleguidist correctly scopes the isolated example to just the desired component.

Author: chrisdopuch

examples/sections/src/components/MyLabel/Label.js

@@ -0,0 +1,8 @@
+import React from 'react';
+
+/**
+ * Simple text label.
+ */
+export default function Label() {
+	return <span>I am a duplicate Label component!</span>;
+}

examples/sections/src/components/MyLabel/Readme.md

@@ -0,0 +1,5 @@
+Should use the `fantasy` font inherited from `body`:
+
+```jsx
+<Label />
+```

examples/sections/src/components/MyLabel/index.js

@@ -0,0 +1 @@
+export { default } from './Label';

examples/sections/styleguide.config.js

@@ -52,6 +52,12 @@ module.exports = {
 					exampleMode: 'expand', // 'hide' | 'collapse' | 'expand'
 					usageMode: 'expand', // 'hide' | 'collapse' | 'expand'
 				},
+				{
+					name: 'Labels',
+					components: () => ['./src/components/MyLabel/Label.js'],
+					exampleMode: 'expand', // 'hide' | 'collapse' | 'expand'
+					usageMode: 'expand', // 'hide' | 'collapse' | 'expand'
+				},
 				{
 					name: 'Others',
 					components: () => ['./src/components/RandomButton/RandomButton.js'],

src/client/utils/__tests__/getUrl.spec.js

@@ -31,37 +31,37 @@ describe('getUrl', () => {
 
 	it('should return an isolated URL', () => {
 		const result = getUrl({ name, slug, isolated: true }, loc);
-		expect(result).toBe('/styleguide/#!/FooBar');
+		expect(result).toBe('/styleguide/#!/Components/FooBar');
 	});
 
 	it('should return an absolute isolated URL', () => {
 		const result = getUrl({ name, slug, isolated: true, absolute: true }, loc);
-		expect(result).toBe('http://example.com/styleguide/#!/FooBar');
+		expect(result).toBe('http://example.com/styleguide/#!/Components/FooBar');
 	});
 
 	it('should return an isolated example URL', () => {
 		const result = getUrl({ name, slug, example: 3, isolated: true }, loc);
-		expect(result).toBe('/styleguide/#!/FooBar/3');
+		expect(result).toBe('/styleguide/#!/Components/FooBar/3');
 	});
 
 	it('should return an isolated example=0 URL', () => {
 		const result = getUrl({ name, slug, example: 0, isolated: true }, loc);
-		expect(result).toBe('/styleguide/#!/FooBar/0');
+		expect(result).toBe('/styleguide/#!/Components/FooBar/0');
 	});
 
 	it('should return an absolute isolated example URL', () => {
 		const result = getUrl({ name, slug, example: 3, isolated: true, absolute: true }, loc);
-		expect(result).toBe('http://example.com/styleguide/#!/FooBar/3');
+		expect(result).toBe('http://example.com/styleguide/#!/Components/FooBar/3');
 	});
 
 	it('should return a nochrome URL', () => {
 		const result = getUrl({ name, slug, nochrome: true }, loc);
-		expect(result).toBe('/styleguide/?nochrome#!/FooBar');
+		expect(result).toBe('/styleguide/?nochrome#!/Components/FooBar');
 	});
 
 	it('should return an absolute nochrome URL', () => {
 		const result = getUrl({ name, slug, nochrome: true, absolute: true }, loc);
-		expect(result).toBe('http://example.com/styleguide/?nochrome#!/FooBar');
+		expect(result).toBe('http://example.com/styleguide/?nochrome#!/Components/FooBar');
 	});
 
 	it('should return a route path', () => {

src/client/utils/getUrl.js

@@ -13,16 +13,14 @@
  */
 export default function getUrl(
 	{ name, slug, example, anchor, isolated, nochrome, absolute, hashPath, id, takeHash } = {},
-	{ origin, pathname, hash } = window.location
+	{ origin, pathname, hash = '' } = window.location
 ) {
 	let url = pathname;
 
+	const currentHash = hash.indexOf('?') > -1 ? hash.substring(0, hash.indexOf('?')) : hash;
+
 	if (takeHash) {
-		if (hash.indexOf('?') > -1) {
-			url += hash.substring(0, hash.indexOf('?'));
-		} else {
-			url += hash;
-		}
+		url += currentHash;
 	}
 
 	if (nochrome) {
@@ -34,7 +32,7 @@ export default function getUrl(
 	if (anchor) {
 		url += `#${slug}`;
 	} else if (isolated || nochrome) {
-		url += `#!/${encodedName}`;
+		url += buildIsolatedOrNoChromeFragment({ currentHash, encodedName });
 	}
 
 	if (hashPath) {
@@ -59,3 +57,21 @@ export default function getUrl(
 
 	return url;
 }
+
+/**
+ * Gets the URL fragment for an isolated or nochrome link.
+ *
+ * @param {string} $.currentHash The current hash fragment of the page
+ * @param {string} $.encodedName The URL encoded name of the component
+ * @return {string}
+ */
+function buildIsolatedOrNoChromeFragment({ currentHash, encodedName }) {
+	const stripFragment = /^#\/?/;
+	const stripTrailingSlash = /\/$/;
+	const currentHashPath =
+		// skip if we are already using `#!/`
+		currentHash && !currentHash.includes('#!/')
+			? currentHash.replace(stripFragment, '').replace(stripTrailingSlash, '') + '/'
+			: '';
+	return `#!/${currentHashPath}${encodedName}`;
+}