Add eslint to devDependencies to support latest ES version

test/playwright-test-main.spec.mjs

@@ -0,0 +1,77 @@
+// @ts-check
+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.describe('test input', () => {
+    test.beforeEach(async ({ page }) => {
+        await page.goto(localHtml);
+    });
+
+    test('accept empty string', async ({ page }) => {
+        // @ts-ignore
+        const uap = await page.evaluate(async () => await UAParser(''));
+        expect(uap).toHaveProperty('ua', '');
+    });
+});
+
+test('read client hints data', async ({ page }) => {
+    await page.addInitScript(() => {
+        Object.defineProperty(navigator, 'userAgentData', {
+            value: {
+                brands: [],
+                platform: '',
+                mobile: false,
+                getHighEntropyValues: () => {
+                    return Promise.resolve({
+                        brands: [
+                            {
+                                brand: 'Chromium',
+                                version: '110'
+                            },
+                            {
+                                brand: 'Not(A:Brand',
+                                version: '110'
+                            },
+                            {
+                                brand: 'New Browser',
+                                version: '110'
+                            }
+                        ],
+                        platform: 'New OS'
+                    });
+                }
+            }
+        });
+    });
+
+    await page.goto(localHtml);
+
+    // @ts-ignore
+    const uap = await page.evaluate(async () => await UAParser().withClientHints());
+
+    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');
+});