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For ScreenshotAPI.net’s /v3/screenshot endpoint, add the delay query parameter in milliseconds. For example, delay=2000 waits two seconds after the configured page-load event and before capture. The documented default is 0, so no extra pause is added.
Set the delay in your ScreenshotAPI request
Add delay to the query parameters sent to ScreenshotAPI.net’s /v3/screenshot service. The value is milliseconds: delay=500 adds half a second, while delay=2000 adds two seconds. The default is 0.
For example, the service documentation demonstrates combining lazy loading with a ten-second delay using lazy_load=true&delay=10000. Apply these settings to the request parameters you already use for the endpoint; this guide does not assume an API key format or a particular client library.
See ScreenshotAPI.net’s Lazy Loading & Delay documentation for the endpoint’s parameter details.
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Understand what the delay waits for
delay is a fixed pause after the configured page-load wait. It does not select the browser event that counts as page readiness. That is the role of wait_for_event. In practice, the browser first waits for the selected load event, then applies the extra delay before capture.
- Use
delaywhen a page needs a predictable extra interval for an animation, an API response, or a late-running script. - Use
wait_for_selectorwhen capture should wait for a particular CSS element to appear. - Use
wait_for_event=networkidlewhen the page’s requests need to settle before capture.
ScreenshotAPI.net describes fixed delay, selector waits, and network-idle waits as controls that can be combined. See its Screenshot API Features page for the feature overview.
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Choose the right wait for the page
Use a fixed delay for a known extra wait
Set delay when the page usually needs about the same amount of time after its load event—for example, to finish a short animation. A fixed pause is simple, but it does not confirm that a particular element or request has finished.
Wait for a page condition when readiness varies
If the screenshot must include a specific element, use wait_for_selector. If the page becomes ready when its asynchronous network activity settles, use wait_for_event=networkidle. These conditions can be more appropriate than guessing a fixed duration; ScreenshotAPI.net says they can also be combined with a delay.
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Trigger content that loads on scroll
A delay alone does not scroll the page to trigger off-screen lazy-loaded content. Set lazy_load=true when the browser needs to scroll through the page to prompt that content to load. The separate scroll_delay parameter controls the pause between scroll steps and defaults to 500 ms.
Do not confuse scroll_delay with delay: the former spaces out lazy-load scrolling, while the latter pauses before capture after the page-load wait. ScreenshotAPI.net documents a default timeout of 100000 ms and cautions that a high scroll delay on a long page can cause total render time to exceed the timeout.
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Troubleshoot a screenshot that is still incomplete
- The target element is missing: A longer fixed delay may not be the most reliable fix if readiness depends on an element appearing. Try
wait_for_selectorfor the relevant CSS selector. - Asynchronous content is still changing: Consider
wait_for_event=networkidle, or combine a readiness control with a short delay if the page needs time after requests settle. - Images farther down the page are absent: Enable
lazy_load=trueso the browser scrolls to trigger deferred content. A post-load delay by itself does not perform that scrolling. - The request times out on a long page: Check whether lazy-load scrolling and a large
scroll_delayare extending render time past the documented 100000 ms default timeout. Reduce the scroll interval or otherwise adjust the wait strategy to fit the page and timeout. - The parameter appears ineffective: Confirm that the request targets ScreenshotAPI.net’s documented
/v3/screenshotservice. Similarly named screenshot products may use different endpoints and parameter names.
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Frequently Asked Questions
What unit does ScreenshotAPI.net use for delay?
Milliseconds: for example, delay=2000 means two seconds.
Does a delay trigger lazy-loaded images?
No. Use lazy_load=true to scroll and trigger off-screen lazy-loaded content; delay adds a pause before capture.
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