Automate web form interactions including login, file upload, text input, and form submission using Playwright. Use when user needs to automate website intera...
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Automate web form interactions reliably using Playwright with best practices for session management, file uploads, and form submission.
const { chromium } = require('playwright');// Basic form automation const browser = await chromium.launch({ headless: true }); const page = await browser.newPage(); await page.goto('https://example.com/form');
// Upload compressed images await page.locator('input[type="file"]').setInputFiles('/path/to/image.webp');
// Type text (triggers events properly) await page.locator('textarea').pressSequentially('Your text', { delay: 30 });
// Submit form await page.locator('button[type="submit"]').click({ force: true });
When user provides a JSON file with session data:
const sessionData = JSON.parse(fs.readFileSync('session.json', 'utf8'));// Set cookies before navigating for (const cookie of sessionData.cookies || []) { await context.addCookies([cookie]); }
// Set localStorage/sessionStorage await page.evaluate((data) => { for (const [k, v] of Object.entries(data.localStorage || {})) { localStorage.setItem(k, v); } }, sessionData);
Always compress images before upload for reliability:
# Convert to webp for best compression convert input.png output.webpOr resize if needed
convert input.png -resize 1024x1024 output.webp
Size comparison:
// 1. Find file inputs const fileInputs = await page.locator('input[type="file"]').all();// 2. Upload with waiting time await fileInputs[0].setInputFiles('/path/to/start.webp'); await page.waitForTimeout(3000); // Wait for upload to process
await fileInputs[1].setInputFiles('/path/to/end.webp'); await page.waitForTimeout(3000);
❌ Don't use fill() - doesn't trigger input events:
await textInput.fill('text'); // May not activate submit button
✅ Use pressSequentially() - simulates real typing:
await textInput.pressSequentially('text', { delay: 30 });
await page.evaluate(() => { const el = document.querySelector('textarea'); el.dispatchEvent(new Event('input', { bubbles: true })); el.dispatchEvent(new Event('change', { bubbles: true })); });
If button appears disabled but should be clickable:
await button.click({ force: true });
const isEnabled = await button.isEnabled(); const isVisible = await button.isVisible();
const { chromium } = require('playwright'); const fs = require('fs');async function submitVideoForm(sessionFile, startImage, endImage, prompt) { const browser = await chromium.launch({ headless: true, args: ['--no-sandbox'] }); const context = await browser.newContext(); const page = await context.newPage();
// Load session if provided if (fs.existsSync(sessionFile)) { const session = JSON.parse(fs.readFileSync(sessionFile, 'utf8')); // Set cookies, localStorage... }
// Navigate await page.goto('https://example.com/video', { waitUntil: 'domcontentloaded' }); await page.waitForTimeout(3000);
// Upload images (webp compressed) const inputs = await page.locator('input[type="file"]').all(); await inputs[0].setInputFiles(startImage); await page.waitForTimeout(3000); await inputs[1].setInputFiles(endImage); await page.waitForTimeout(3000);
// Select options await page.click('text=Seedance 2.0 Fast'); await page.click('text=15s');
// Type prompt const textarea = page.locator('textarea').first(); await textarea.pressSequentially(prompt, { delay: 30 }); await page.waitForTimeout(2000);
// Submit await page.locator('button[class*="submit"]').click({ force: true });
// Wait and screenshot await page.waitForTimeout(5000); await page.screenshot({ path: 'result.png' });
await browser.close(); }
The
scripts/webp-compress.shform-submit.jsNo automatic installation available. Please visit the source repository for installation instructions.
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