Move feature detection into its own method: withFeatureCheck

.gitignore

@@ -1,6 +1,7 @@
 node_modules/
 npm-debug.log
 playwright-report/
+test-results/
 
 ### vim ###
 .*.s[a-w][a-z]

changelog.md

@@ -7,6 +7,7 @@
 - What's new:
   - Add some new methods in result object: 
     - Add support for client hints: `withClientHints()`
+    - Add support for feature detection: `withFeatureCheck()`
     - Utility for easy comparison: `is()`
     - Utility to print full-name: `toString()`
   - Add support for ES module `import { UAParser } from 'ua-parser-js'`

readme.md

@@ -346,6 +346,21 @@ new UAParser(request.headers)
 });
 ```
 
+#### * `withFeatureCheck():object` `since@2.0`
+
+This method allows us to examine other features beyond `navigator.userAgent` to further improve detection of the following:
+- browser : Brave (check for `navigator.isBrave`)
+- device  : iPad (check for `navigator.standalone` & `navigator.maxTouchPoints`)
+
+```js
+// suppose this code runs on iPad
+const withoutFeatureCheck = UAParser();
+const withFeatureCheck = UAParser().withFeatureCheck();
+
+console.log(withoutFeatureCheck.device); // { vendor : "Apple", model : "Macintosh", type : undefined }
+console.log(withFeatureCheck.device);    // { vendor : "Apple", model : "iPad", type : "tablet" }
+```
+
 ## Extending Regex
 
 If you want to detect something that's not currently provided by UAParser.js (eg: `bots`, specific apps, etc), you can pass a list of regexes to extend internal UAParser.js regexes with your own.

src/ua-parser.js

@@ -862,6 +862,10 @@
             });
         };
 
+        UAParserData.prototype.withFeatureCheck = function () {
+            return item.detectFeature().get();
+        };
+
         if (itemType != UA_RESULT) {
             UAParserData.prototype.is = function (strToCheck) {
                 var is = false;
@@ -978,6 +982,20 @@
                         if (!this.get(NAME) && NAVIGATOR_UADATA && NAVIGATOR_UADATA[PLATFORM]) {
                             this.set(NAME, NAVIGATOR_UADATA[PLATFORM]);
                         }
+                        break;
+                    case UA_RESULT:
+                        var data = this.data;
+                        var detect = function (itemType) {
+                            return data[itemType]
+                                    .getItem()
+                                    .detectFeature()
+                                    .get();
+                        };
+                        this.set(UA_BROWSER, detect(UA_BROWSER))
+                            .set(UA_CPU, detect(UA_CPU))
+                            .set(UA_DEVICE, detect(UA_DEVICE))
+                            .set(UA_ENGINE, detect(UA_ENGINE))
+                            .set(UA_OS, detect(UA_OS));
                 }
             }
             return this;
@@ -1046,8 +1064,7 @@
                                 .parseCH()
                                 .get();
                     };
-                    this.set('ua', ua)
+                    this.set(UA_BROWSER, parse(UA_BROWSER))
-                        .set(UA_BROWSER, parse(UA_BROWSER))
                         .set(UA_CPU, parse(UA_CPU))
                         .set(UA_DEVICE, parse(UA_DEVICE))
                         .set(UA_ENGINE, parse(UA_ENGINE))
@@ -1118,7 +1135,6 @@
                     return function () {
                         return new UAParserItem(itemType, userAgent, regexMap[itemType], HTTP_UACH)
                                     .parseUA()
-                                    .detectFeature()
                                     .get();
                     };
                 }

test/playwright-test-browser.spec.mjs

@@ -3,6 +3,8 @@ import { test, expect } from '@playwright/test';
 import path from 'path';
 import url from 'url';
 
+const localHtml = `file://${path.resolve(path.dirname(url.fileURLToPath(import.meta.url)), '../')}/dist/ua-parser.html`;
+
 test('read client hints data', async ({ page }) => {
     await page.addInitScript(() => {
         Object.defineProperty(navigator, 'userAgentData', {
@@ -33,8 +35,7 @@ test('read client hints data', async ({ page }) => {
         });
     });
 
-  const dirname = path.resolve(path.dirname(url.fileURLToPath(import.meta.url)), '../');
+    await page.goto(localHtml);
-  await page.goto(`file://${dirname}/dist/ua-parser.html`);
 
     // @ts-ignore
     const uap = await page.evaluate(async () => await UAParser().withClientHints());
@@ -42,3 +43,23 @@ test('read client hints data', async ({ page }) => {
     expect(uap).toHaveProperty('browser.name', 'New Browser');
     expect(uap).toHaveProperty('os.name', 'New OS');
 });
+
+test('detect Brave', async ({ page }) => {
+    await page.addInitScript(() => {
+        Object.defineProperty(navigator, 'brave', {
+            value: {
+                isBrave: () => true
+            }
+        });
+    });
+
+    await page.goto(localHtml);
+
+    // @ts-ignore
+    let uap = await page.evaluate(() => UAParser());
+    expect(uap).toHaveProperty('browser.name', 'Chrome Headless');
+
+    // @ts-ignore
+    uap = await page.evaluate(() => UAParser().withFeatureCheck());
+    expect(uap).toHaveProperty('browser.name', 'Brave');
+});