| # Copyright 2017 The Chromium Authors | |
| # Use of this source code is governed by a BSD-style license that can be | |
| # found in the LICENSE file. | |
| # | |
| # Contributing to Chrome DevTools Protocol: https://goo.gle/devtools-contribution-guide-cdp | |
| # Reporting of performance timeline events, as specified in | |
| # https://w3c.github.io/performance-timeline/#dom-performanceobserver. | |
| experimental domain PerformanceTimeline | |
| depends on DOM | |
| depends on Network | |
| # See https://github.com/WICG/LargestContentfulPaint and largest_contentful_paint.idl | |
| type LargestContentfulPaint extends object | |
| properties | |
| Network.TimeSinceEpoch renderTime | |
| Network.TimeSinceEpoch loadTime | |
| # The number of pixels being painted. | |
| number size | |
| # The id attribute of the element, if available. | |
| optional string elementId | |
| # The URL of the image (may be trimmed). | |
| optional string url | |
| optional DOM.BackendNodeId nodeId | |
| type LayoutShiftAttribution extends object | |
| properties | |
| DOM.Rect previousRect | |
| DOM.Rect currentRect | |
| optional DOM.BackendNodeId nodeId | |
| # See https://wicg.github.io/layout-instability/#sec-layout-shift and layout_shift.idl | |
| type LayoutShift extends object | |
| properties | |
| # Score increment produced by this event. | |
| number value | |
| boolean hadRecentInput | |
| Network.TimeSinceEpoch lastInputTime | |
| array of LayoutShiftAttribution sources | |
| type TimelineEvent extends object | |
| properties | |
| # Identifies the frame that this event is related to. Empty for non-frame targets. | |
| Page.FrameId frameId | |
| # The event type, as specified in https://w3c.github.io/performance-timeline/#dom-performanceentry-entrytype | |
| # This determines which of the optional "details" fields is present. | |
| string type | |
| # Name may be empty depending on the type. | |
| string name | |
| # Time in seconds since Epoch, monotonically increasing within document lifetime. | |
| Network.TimeSinceEpoch time | |
| # Event duration, if applicable. | |
| optional number duration | |
| optional LargestContentfulPaint lcpDetails | |
| optional LayoutShift layoutShiftDetails | |
| # Previously buffered events would be reported before method returns. | |
| # See also: timelineEventAdded | |
| command enable | |
| parameters | |
| # The types of event to report, as specified in | |
| # https://w3c.github.io/performance-timeline/#dom-performanceentry-entrytype | |
| # The specified filter overrides any previous filters, passing empty | |
| # filter disables recording. | |
| # Note that not all types exposed to the web platform are currently supported. | |
| array of string eventTypes | |
| # Sent when a performance timeline event is added. See reportPerformanceTimeline method. | |
| event timelineEventAdded | |
| parameters | |
| TimelineEvent event | |
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