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There is no single “page ready” signal that fits every Puppeteer task. Use page.goto() with the right waitUntil event for a navigation milestone, or wait for the specific element your script needs. Puppeteer 25.12.0 documents load as the navigation default, alongside DOM and network-idle options; check your installed version if your project pins an older release.
Choose the readiness signal your task needs
A browser event tells you something about the document or its network activity; it does not necessarily tell you that an application has finished rendering the exact data you need. Choose the signal based on the next action.
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| Signal | Use it when | What it means |
|---|---|---|
domcontentloaded |
You need parsed document structure and will wait separately for the relevant content. | The DOMContentLoaded event fired. |
load |
The browser’s load event is the milestone your task requires. | The load event fired. This is the page.goto() default. |
networkidle0 |
A fully quiet network is a useful proxy for your task. | No more than zero network connections for at least 500 ms. |
networkidle2 |
A small amount of ongoing network activity is acceptable. | No more than two network connections for at least 500 ms. |
waitForSelector() or a locator |
A particular UI element or interaction state defines readiness. | The specified element appears, or the locator’s action preconditions are met. |
The lifecycle meanings and idle interval are documented in Puppeteer’s lifecycle event reference. The waitUntil choices and navigation timeout options are in the goto options reference.
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Wait for a navigation milestone
Pass waitUntil to page.goto(). The following runnable example waits for the document to be parsed, then reads its title:
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const puppeteer = require('puppeteer');
(async () => {
const browser = await puppeteer.launch();
try {
const page = await browser.newPage();
await page.goto('https://example.com', {
waitUntil: 'domcontentloaded',
});
console.log(await page.title());
} finally {
await browser.close();
}
})();Use load when you specifically need the browser load event; omitting waitUntil uses that default. Choose networkidle0 or networkidle2 only when the stated network quiet condition is meaningful for the page. A quiet network is not proof that every client-side render or asynchronous operation has completed.
Wait for the content you actually need
For a search result, dashboard panel, or other known UI element, wait for that element instead of assuming a generic page event implies readiness:
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await page.goto('https://example.com', {
waitUntil: 'domcontentloaded',
});
await page.waitForSelector('[data-testid="results"]', {
visible: true,
timeout: 10_000,
});waitForSelector() resolves when the selector appears. With visible: true, it must also be in the DOM and visible. Its documented default timeout is 30 seconds, and the wait works across navigations; see the API reference.
Prefer locators when the next step is an interaction
Current Puppeteer guidance recommends locators for actions such as clicking or typing. A locator waits for the element to reach the state needed for the requested action, including visibility and enabled state where relevant. Use waitForSelector() when you need an explicit wait or an ElementHandle; it does not automatically retry a later action. Dispose of a returned handle when you are finished with it. See the page interactions guide.
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Wait for network idle only when it fits
networkidle0 and networkidle2 use different thresholds: zero versus at most two active network connections, each maintained for at least 500 milliseconds. Pages with polling, streaming, analytics, or other persistent traffic may not reach the desired idle condition. Conversely, the network can become quiet before the application has finished displaying the content your script needs.
If you want a separate network-idle wait, page.waitForNetworkIdle() waits at least for its configured idle time. Its documented defaults are zero concurrent connections and 500 milliseconds of idle time. Use a selector or another task-specific condition when network quiet is not the result you need. See the network-idle API reference.
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Set a useful timeout and inspect navigation results
Puppeteer documents a 30,000 ms default timeout for navigation and selector waits. Set a per-call timeout where supported, or adjust the page’s default timeout or default navigation timeout for a workflow that needs a different budget. A timeout of 0 disables the timeout; use it only when an unbounded wait is intentional. See the default timeout API and navigation timeout API.
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page.goto() resolves with the main resource response; after redirects, that is the last redirect response. It returns null for navigation to about:blank or a same-URL hash change. In headless shell mode, valid HTTP error responses such as 404 or 500 do not by themselves cause it to throw, so inspect the response status if HTTP success matters. See the page.goto() reference.
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Troubleshoot waits that time out or finish too soon
waitForSelector()times out: Check that the selector matches the live page, that the element is added on the route you opened, and that it becomes visible if you setvisible: true. Increase the timeout only if the operation legitimately needs more time.networkidle0never completes: The page may keep connections open or continue making requests. Usenetworkidle2if its threshold suits the task, or wait for the actual result element instead.- The wait completes but the page is still not usable: A lifecycle event or network quiet condition may precede the app’s render. Wait for a selector or use a locator for the interaction state you need.
page.goto()returnsnull: This is documented forabout:blankand same-URL hash navigation; do not treat it as a normal main-resource response.- The script continues after an HTTP error status: Check the returned response’s status when using headless shell, which does not throw for valid error status codes such as 404 or 500.
Or skip the browser setup
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