Puppeteer wait page load after form submit

Solution 1:

You can wait for navigation asynchronously to avoid getting null on redirection,

await Promise.all([
    page.click('button[type=submit]'),
    page.waitForNavigation({waitUntil: 'networkidle2'})
]);

This will help you if the page.click already triggers a navigation.

Solution 2:

await page.waitForNavigation();

Solution 3:

According to the Official Documentation, you should use:

page.waitForNavigation(options)

• options <Object> Navigation parameters which might have the following properties:
  • timeout <number> Maximum navigation time in milliseconds, defaults to 30 seconds, pass 0 to disable timeout. The default value can be changed by using the page.setDefaultNavigationTimeout(timeout) method.
  • waitUntil <string|Array<string>> When to consider navigation succeeded, defaults to load. Given an array of event strings, navigation is considered to be successful after all events have been fired. Events can be either:
    • load - consider navigation to be finished when the load event is fired.
    • domcontentloaded - consider navigation to be finished when the DOMContentLoaded event is fired.
    • networkidle0 - consider navigation to be finished when there are no more than 0 network connections for at least 500 ms.
    • networkidle2 - consider navigation to be finished when there are no more than 2 network connections for at least 500 ms.
• returns: <Promise<[?Response]>> Promise which resolves to the main resource response. In case of multiple redirects, the navigation will resolve with the response of the last redirect. In case of navigation to a different anchor or navigation due to History API usage, the navigation will resolve with null.

Readability:

You can use page.waitForNavigation() to wait for a page to navigate:

await page.waitForNavigation();

Performance:

But since page.waitForNavigation() is a shortcut for page.mainFrame().waitForNavigation(), we can use the following for a minor performance enhancement:

await page._frameManager._mainFrame.waitForNavigation();