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Add infrastructure for passive/non-passive event support for future API exploration #15036

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merged 20 commits into from
Mar 15, 2019
Merged

Add infrastructure for passive/non-passive event support for future API exploration #15036

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858608b
Add infrastructure for passive/non-passive event support for future e…
trueadm Mar 6, 2019
0ae3ba3
More Flow fixes
trueadm Mar 6, 2019
3bd6176
Add fallback to Map if there is no WeakMap
trueadm Mar 6, 2019
06f2c3b
Fix prettier
trueadm Mar 6, 2019
bbae02d
Update comment
trueadm Mar 6, 2019
68934d8
Add isLegacy flag to EventPlugins
trueadm Mar 13, 2019
37224ea
Handle fallback for no passive support
trueadm Mar 13, 2019
c683859
Fixed typo + improve code size
trueadm Mar 13, 2019
e7e742f
Changed to enum for passive event types and addressed PR feedback
trueadm Mar 13, 2019
ccf3884
Added comment to describe intent
trueadm Mar 13, 2019
c9fc178
use canUseDOM
trueadm Mar 13, 2019
5d5b972
Cleaned up some logic and reduces more bytes
trueadm Mar 13, 2019
e186b09
Fix typo
trueadm Mar 14, 2019
1dff1fc
Address nits
trueadm Mar 14, 2019
8f79ee8
Addressed feedback and took a different approach with flags
trueadm Mar 14, 2019
159280c
Merge branch 'master' into passive-event-listening
trueadm Mar 14, 2019
2acacf8
Wrap function in flags
trueadm Mar 14, 2019
3b67255
Remove more code that is not needed anymore
trueadm Mar 14, 2019
5b044cf
Adds flag to another location
trueadm Mar 14, 2019
8b34efa
Address feedback on addEventListener
trueadm Mar 15, 2019
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12 changes: 12 additions & 0 deletions packages/events/EventPluginHub.js
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Original file line number Diff line number Diff line change
Expand Up @@ -163,17 +163,27 @@ function extractEvents(
targetInst: null | Fiber,
nativeEvent: AnyNativeEvent,
nativeEventTarget: EventTarget,
passive: null | boolean,
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): Array<ReactSyntheticEvent> | ReactSyntheticEvent | null {
let events = null;
for (let i = 0; i < plugins.length; i++) {
// Not every plugin in the ordering may be loaded at runtime.
const possiblePlugin: PluginModule<AnyNativeEvent> = plugins[i];
if (possiblePlugin) {
// Check if the plugin supports legacy or non legacy events
// based on the passive flag being null or a boolean
if (
(possiblePlugin.isLegacy && passive !== null) ||
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(!possiblePlugin.isLegacy && passive === null)
) {
continue;
}
const extractedEvents = possiblePlugin.extractEvents(
topLevelType,
targetInst,
nativeEvent,
nativeEventTarget,
passive,
);
if (extractedEvents) {
events = accumulateInto(events, extractedEvents);
Expand Down Expand Up @@ -214,12 +224,14 @@ export function runExtractedEventsInBatch(
targetInst: null | Fiber,
nativeEvent: AnyNativeEvent,
nativeEventTarget: EventTarget,
passive: null | boolean,
) {
const events = extractEvents(
topLevelType,
targetInst,
nativeEvent,
nativeEventTarget,
passive,
);
runEventsInBatch(events);
}
2 changes: 2 additions & 0 deletions packages/events/PluginModuleType.js
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Original file line number Diff line number Diff line change
Expand Up @@ -22,11 +22,13 @@ export type PluginName = string;

export type PluginModule<NativeEvent> = {
eventTypes: EventTypes,
isLegacy: boolean,
extractEvents: (
topLevelType: TopLevelType,
targetInst: null | Fiber,
nativeTarget: NativeEvent,
nativeEventTarget: EventTarget,
passive?: null | boolean,
) => ?ReactSyntheticEvent,
tapMoveThreshold?: number,
};
8 changes: 4 additions & 4 deletions packages/events/ReactGenericBatching.js
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Original file line number Diff line number Diff line change
Expand Up @@ -20,8 +20,8 @@ import {
let _batchedUpdatesImpl = function(fn, bookkeeping) {
return fn(bookkeeping);
};
let _interactiveUpdatesImpl = function(fn, a, b) {
return fn(a, b);
let _interactiveUpdatesImpl = function(fn, a, b, c) {
return fn(a, b, c);
};
let _flushInteractiveUpdatesImpl = function() {};

Expand Down Expand Up @@ -52,8 +52,8 @@ export function batchedUpdates(fn, bookkeeping) {
}
}

export function interactiveUpdates(fn, a, b) {
return _interactiveUpdatesImpl(fn, a, b);
export function interactiveUpdates(fn, a, b, c) {
return _interactiveUpdatesImpl(fn, a, b, c);
}

export function flushInteractiveUpdates() {
Expand Down
2 changes: 2 additions & 0 deletions packages/events/ResponderEventPlugin.js
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Original file line number Diff line number Diff line change
Expand Up @@ -497,6 +497,8 @@ const ResponderEventPlugin = {

eventTypes: eventTypes,

isLegacy: true,
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/**
* We must be resilient to `targetInst` being `null` on `touchMove` or
* `touchEnd`. On certain platforms, this means that a native scroll has
Expand Down
8 changes: 4 additions & 4 deletions packages/react-dom/src/__tests__/ReactBrowserEventEmitter-test.internal.js
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Original file line number Diff line number Diff line change
Expand Up @@ -331,15 +331,15 @@ describe('ReactBrowserEventEmitter', () => {

it('should listen to events only once', () => {
spyOnDevAndProd(EventTarget.prototype, 'addEventListener');
ReactBrowserEventEmitter.listenTo(ON_CLICK_KEY, document);
ReactBrowserEventEmitter.listenTo(ON_CLICK_KEY, document);
ReactBrowserEventEmitter.listenTo(ON_CLICK_KEY, document, true);
ReactBrowserEventEmitter.listenTo(ON_CLICK_KEY, document, true);
expect(EventTarget.prototype.addEventListener).toHaveBeenCalledTimes(1);
});

it('should work with event plugins without dependencies', () => {
spyOnDevAndProd(EventTarget.prototype, 'addEventListener');

ReactBrowserEventEmitter.listenTo(ON_CLICK_KEY, document);
ReactBrowserEventEmitter.listenTo(ON_CLICK_KEY, document, true);

expect(EventTarget.prototype.addEventListener.calls.argsFor(0)[0]).toBe(
'click',
Expand All @@ -349,7 +349,7 @@ describe('ReactBrowserEventEmitter', () => {
it('should work with event plugins with dependencies', () => {
spyOnDevAndProd(EventTarget.prototype, 'addEventListener');

ReactBrowserEventEmitter.listenTo(ON_CHANGE_KEY, document);
ReactBrowserEventEmitter.listenTo(ON_CHANGE_KEY, document, true);

const setEventListeners = [];
const listenCalls = EventTarget.prototype.addEventListener.calls.allArgs();
Expand Down
51 changes: 27 additions & 24 deletions packages/react-dom/src/client/ReactDOMComponent.js
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Original file line number Diff line number Diff line change
Expand Up @@ -253,14 +253,17 @@ if (__DEV__) {
};
}

function ensureListeningTo(rootContainerElement, registrationName) {
function ensureListeningTo(
rootContainerElement: Element | Node,
registrationName: string,
): void {
const isDocumentOrFragment =
rootContainerElement.nodeType === DOCUMENT_NODE ||
rootContainerElement.nodeType === DOCUMENT_FRAGMENT_NODE;
const doc = isDocumentOrFragment
? rootContainerElement
: rootContainerElement.ownerDocument;
listenTo(registrationName, doc);
listenTo(registrationName, doc, true /* isLegacy */);
}

function getOwnerDocumentFromRootContainer(
Expand Down Expand Up @@ -494,41 +497,41 @@ export function setInitialProperties(
switch (tag) {
case 'iframe':
case 'object':
trapBubbledEvent(TOP_LOAD, domElement);
trapBubbledEvent(TOP_LOAD, domElement, true);
props = rawProps;
break;
case 'video':
case 'audio':
// Create listener for each media event
for (let i = 0; i < mediaEventTypes.length; i++) {
trapBubbledEvent(mediaEventTypes[i], domElement);
trapBubbledEvent(mediaEventTypes[i], domElement, true);
}
props = rawProps;
break;
case 'source':
trapBubbledEvent(TOP_ERROR, domElement);
trapBubbledEvent(TOP_ERROR, domElement, true);
props = rawProps;
break;
case 'img':
case 'image':
case 'link':
trapBubbledEvent(TOP_ERROR, domElement);
trapBubbledEvent(TOP_LOAD, domElement);
trapBubbledEvent(TOP_ERROR, domElement, true);
trapBubbledEvent(TOP_LOAD, domElement, true);
props = rawProps;
break;
case 'form':
trapBubbledEvent(TOP_RESET, domElement);
trapBubbledEvent(TOP_SUBMIT, domElement);
trapBubbledEvent(TOP_RESET, domElement, true);
trapBubbledEvent(TOP_SUBMIT, domElement, true);
props = rawProps;
break;
case 'details':
trapBubbledEvent(TOP_TOGGLE, domElement);
trapBubbledEvent(TOP_TOGGLE, domElement, true);
props = rawProps;
break;
case 'input':
ReactDOMInputInitWrapperState(domElement, rawProps);
props = ReactDOMInputGetHostProps(domElement, rawProps);
trapBubbledEvent(TOP_INVALID, domElement);
trapBubbledEvent(TOP_INVALID, domElement, true);
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Collaborator

@gaearon gaearon Mar 14, 2019 •
edited
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Per our discussion, it seems like these code paths will never "want" to get two listeners attached/invoked. So instead of branching deeply and passing an argument through, let's fork the innermost implementation and call the fork from the new code when we want to. That will also likely let us DCE more based on a feature flag.

// For controlled components we always need to ensure we're listening
// to onChange. Even if there is no listener.
ensureListeningTo(rootContainerElement, 'onChange');
Expand All @@ -540,15 +543,15 @@ export function setInitialProperties(
case 'select':
ReactDOMSelectInitWrapperState(domElement, rawProps);
props = ReactDOMSelectGetHostProps(domElement, rawProps);
trapBubbledEvent(TOP_INVALID, domElement);
trapBubbledEvent(TOP_INVALID, domElement, true);
// For controlled components we always need to ensure we're listening
// to onChange. Even if there is no listener.
ensureListeningTo(rootContainerElement, 'onChange');
break;
case 'textarea':
ReactDOMTextareaInitWrapperState(domElement, rawProps);
props = ReactDOMTextareaGetHostProps(domElement, rawProps);
trapBubbledEvent(TOP_INVALID, domElement);
trapBubbledEvent(TOP_INVALID, domElement, true);
// For controlled components we always need to ensure we're listening
// to onChange. Even if there is no listener.
ensureListeningTo(rootContainerElement, 'onChange');
Expand Down Expand Up @@ -888,34 +891,34 @@ export function diffHydratedProperties(
switch (tag) {
case 'iframe':
case 'object':
trapBubbledEvent(TOP_LOAD, domElement);
trapBubbledEvent(TOP_LOAD, domElement, true);
break;
case 'video':
case 'audio':
// Create listener for each media event
for (let i = 0; i < mediaEventTypes.length; i++) {
trapBubbledEvent(mediaEventTypes[i], domElement);
trapBubbledEvent(mediaEventTypes[i], domElement, true);
}
break;
case 'source':
trapBubbledEvent(TOP_ERROR, domElement);
trapBubbledEvent(TOP_ERROR, domElement, true);
break;
case 'img':
case 'image':
case 'link':
trapBubbledEvent(TOP_ERROR, domElement);
trapBubbledEvent(TOP_LOAD, domElement);
trapBubbledEvent(TOP_ERROR, domElement, true);
trapBubbledEvent(TOP_LOAD, domElement, true);
break;
case 'form':
trapBubbledEvent(TOP_RESET, domElement);
trapBubbledEvent(TOP_SUBMIT, domElement);
trapBubbledEvent(TOP_RESET, domElement, true);
trapBubbledEvent(TOP_SUBMIT, domElement, true);
break;
case 'details':
trapBubbledEvent(TOP_TOGGLE, domElement);
trapBubbledEvent(TOP_TOGGLE, domElement, true);
break;
case 'input':
ReactDOMInputInitWrapperState(domElement, rawProps);
trapBubbledEvent(TOP_INVALID, domElement);
trapBubbledEvent(TOP_INVALID, domElement, true);
// For controlled components we always need to ensure we're listening
// to onChange. Even if there is no listener.
ensureListeningTo(rootContainerElement, 'onChange');
Expand All @@ -925,14 +928,14 @@ export function diffHydratedProperties(
break;
case 'select':
ReactDOMSelectInitWrapperState(domElement, rawProps);
trapBubbledEvent(TOP_INVALID, domElement);
trapBubbledEvent(TOP_INVALID, domElement, true);
// For controlled components we always need to ensure we're listening
// to onChange. Even if there is no listener.
ensureListeningTo(rootContainerElement, 'onChange');
break;
case 'textarea':
ReactDOMTextareaInitWrapperState(domElement, rawProps);
trapBubbledEvent(TOP_INVALID, domElement);
trapBubbledEvent(TOP_INVALID, domElement, true);
// For controlled components we always need to ensure we're listening
// to onChange. Even if there is no listener.
ensureListeningTo(rootContainerElement, 'onChange');
Expand Down
2 changes: 2 additions & 0 deletions packages/react-dom/src/events/BeforeInputEventPlugin.js
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Original file line number Diff line number Diff line change
Expand Up @@ -462,6 +462,8 @@ function extractBeforeInputEvent(
const BeforeInputEventPlugin = {
eventTypes: eventTypes,

isLegacy: true,
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extractEvents: function(
topLevelType,
targetInst,
Expand Down
2 changes: 2 additions & 0 deletions packages/react-dom/src/events/ChangeEventPlugin.js
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Expand Up @@ -258,6 +258,8 @@ function handleControlledInputBlur(node) {
const ChangeEventPlugin = {
eventTypes: eventTypes,

isLegacy: true,

_isInputEventSupported: isInputEventSupported,

extractEvents: function(
Expand Down
2 changes: 2 additions & 0 deletions packages/react-dom/src/events/EnterLeaveEventPlugin.js
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Expand Up @@ -42,6 +42,8 @@ const eventTypes = {
const EnterLeaveEventPlugin = {
eventTypes: eventTypes,

isLegacy: true,

/**
* For almost every interaction we care about, there will be both a top-level
* `mouseover` and `mouseout` event that occurs. Only use `mouseout` so that
Expand Down
24 changes: 20 additions & 4 deletions packages/react-dom/src/events/EventListener.js
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Expand Up @@ -8,17 +8,33 @@
*/

export function addEventBubbleListener(
element: Document | Element,
element: Document | Element | Node,
eventType: string,
listener: Function,
isPassive: boolean | null,
): void {
element.addEventListener(eventType, listener, false);
if (isPassive === null) {
element.addEventListener(eventType, listener, false);
} else {
element.addEventListener(eventType, listener, {
passive: isPassive,
capture: false,
});
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}
}

export function addEventCaptureListener(
element: Document | Element,
element: Document | Element | Node,
eventType: string,
listener: Function,
isPassive: boolean | null,
): void {
element.addEventListener(eventType, listener, true);
if (isPassive === null) {
element.addEventListener(eventType, listener, true);
} else {
element.addEventListener(eventType, listener, {
passive: isPassive,
capture: true,
});
}
}
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