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2.6 KiB
2.6 KiB
Verification
Screenshots
// Save to file
await page.screenshot({path: 'screenshot.png'});
// Capture full page
await page.screenshot({path: 'screenshot.png', fullPage: true});
// Capture into buffer
const buffer = await page.screenshot();
console.log(buffer.toString('base64'));
// Capture given element
const elementHandle = await page.$('.header');
await elementHandle.screenshot({ path: 'screenshot.png' });
API reference
Console logs
Console messages logged in the page can be brought into the Node.js context.
// Listen for all console logs
page.on('console', msg => console.log(msg.text()))
// Listen for all console events and handle errors
page.on('console', msg => {
if (msg.type() === 'error')
console.log(`Error text: "${msg.text()}"`);
});
// Get the next console log
const [msg] = await Promise.all([
page.waitForEvent('console'),
// Issue console.log inside the page
page.evaluate(() => {
console.log('hello', 42, {foo: 'bar'});
}),
]);
// Deconstruct console log arguments
await msg.args[0].jsonValue() // hello
await msg.args[1].jsonValue() // 42
API reference
Page errors
Listen for uncaught exceptions in the page with the pagerror event.
// Log all uncaught errors to the terminal
page.on('pageerror', exception => {
console.log(`Uncaught exception: "${exception}"`);
});
// Navigate to a page with an exception.
await page.goto('data:text/html,<script>throw new Error("Test")</script>');
API reference
Page events
"requestfailed"
page.on('requestfailed', request => {
console.log(request.url() + ' ' + request.failure().errorText);
});
"dialog" - handle alert, confirm, prompt
page.on('dialog', dialog => {
dialog.accept();
});
"popup" - handle popup windows
const [popup] = await Promise.all([
page.waitForEvent('popup'),
page.click('#open')
]);