Selenium WebDriver’s normal page-load strategy waits for the document’s readyState to become complete before a navigation command returns. That does not mean a JavaScript application has finished rendering the content your test needs. After navigation, use an explicit wait for the specific condition required by your next action, such as an element becoming visible.
What Selenium means by “page loaded”
A navigation command such as driver.get(url) waits according to the session’s page-load strategy. The default, normal, waits for the document readiness state complete. That threshold concerns the document and its resources; JavaScript can still update the page after navigation returns, so a dynamically rendered element may not yet exist or be ready for interaction. Selenium’s waiting-strategies documentation and its browser options documentation describe these distinct readiness concerns.
Choose a wait based on the next step in the test. If the test must click a button, wait for that button to be visible or clickable rather than guessing that the whole application has “finished.”
Use an explicit wait for the condition your test needs
Explicit waits poll a condition until it succeeds or the timeout expires. In Python, a visibility condition can be written like this:
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from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
url = "https://example.com"
driver.get(url)
submit = WebDriverWait(driver, 10).until(
EC.visibility_of_element_located((By.CSS_SELECTOR, "button[type='submit']"))
)
submit.click()Replace the URL and selector with those for the page under test. The 10-second timeout is an example, not a universal recommendation; set it to suit the application and test environment. Selenium’s documentation also illustrates the pattern WebDriverWait(driver, timeout=2).until(lambda _: revealed.is_displayed()); that two-second value is likewise illustrative. See Selenium’s expected-conditions documentation for supported condition patterns.
For a custom condition, the function passed to until should return a truthy value when the required state is reached. For example, wait until a loading indicator disappears if that is the application state that makes the next action safe. Prefer a condition that reflects the test’s actual need over a generic delay.
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Choose the right waiting mechanism
| Mechanism | Scope and signal | What it does not guarantee |
|---|---|---|
| Page-load strategy | Controls how long navigation blocks: normal waits for complete, eager for interactive, and none does not block on a ready-state threshold. |
It does not prove that a particular dynamic element or application state is ready. |
| Implicit wait | Applies to element-location calls throughout the session; unsuccessful lookups wait up to the configured implicit timeout. The default is zero. | It does not wait for visibility or an application-specific condition. |
| Explicit wait | Polls one chosen condition, such as an element becoming visible, until it succeeds or times out. | It does not change the navigation threshold or automatically govern unrelated lookups. |
For most tests that need to interact with dynamic content, keep implicit wait at its default of zero and use explicit waits where needed. Selenium warns: “Do not mix implicit and explicit waits.” Combining them can lead to unpredictable wait durations. The Selenium Project explains the warning in its waiting-strategies documentation.
Adjust navigation blocking with page-load strategies
Set a page-load strategy when you want navigation to wait for a different document-readiness threshold. In Python, configure it in browser options before creating the driver:
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from selenium import webdriver
options = webdriver.ChromeOptions()
options.page_load_strategy = "eager" # "normal", "eager", or "none"
driver = webdriver.Chrome(options=options)
driver.get("https://example.com")normal: waits forcompleteand is the default.eager: waits forinteractive; other resources may still be loading.none: does not block WebDriver on a ready-state threshold.
These settings can avoid waiting for resources a particular test does not need, but neither eager nor none makes an application’s dynamic content ready. Follow navigation with an explicit condition when the test depends on a specific element or state. Options and bindings can differ by Selenium version, so check the documentation that matches the installed version.
Keep the three timeout types separate
A WebDriver session has distinct timeouts for navigation, element lookup, and script execution. The Selenium browser-options documentation lists these defaults for a new session: page-load timeout 300,000 ms, implicit timeout 0 ms, and script timeout 30,000 ms. These are documented defaults, not recommended values for every test, and may change in later Selenium or WebDriver revisions. See the browser options documentation.
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- Page-load timeout: limits how long navigation waits under the selected page-load strategy.
- Implicit timeout: limits the wait applied to element-location calls.
- Script timeout: limits execution of asynchronous scripts.
A timeout in one category does not replace a condition-based wait in another. Set the relevant timeout for the operation that is actually failing.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Common problems and fixes
- The next lookup fails immediately after navigation: the document may have reached its navigation threshold while the application is still rendering. Add an explicit wait for the element or state the next step needs.
- The element is found but cannot be interacted with: locating an element is not the same as waiting for it to be visible or otherwise ready. Use an appropriate explicit condition, such as visibility, before acting.
- A fixed sleep is sometimes too short and sometimes wastes time: a sleep always waits a predetermined duration without checking readiness. Replace it with a condition-based explicit wait.
- The wait takes longer than expected after mixing wait types: implicit and explicit waits can interact unpredictably. Avoid combining them; prefer explicit waits for the conditions the test depends on.
- Navigation returns early after changing to
eagerornone: those strategies intentionally use a lower or no ready-state blocking threshold. Add an explicit wait for the application condition required before continuing. - A wait expires despite the page appearing loaded: verify the selector, the condition, and whether the element is in the state your condition requires. A page-level ready state is not a substitute for checking the test’s target.
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