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Fix onPress event accidentally triggered while scrolling the page #997

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Fix onPress event accidentally triggered while scrolling the page #997

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9 changes: 8 additions & 1 deletion packages/react-native-web/src/exports/Touchable/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -755,7 +755,14 @@ const TouchableMixin = {
(!hasLongPressHandler || // But either has no long handler
!this.touchableLongPressCancelsPress()); // or we're told to ignore it.

const shouldInvokePress = !IsLongPressingIn[curState] || pressIsLongButStillCallOnPress;
// Fix onPress event accidentally triggered while scrolling the page
const touchBank = e.touchHistory.touchBank[e.touchHistory.indexOfSingleActiveTouch];
const offset = Math.sqrt(Math.pow(touchBank.startPageX - touchBank.currentPageX, 2)
+ Math.pow(touchBank.startPageY - touchBank.currentPageY, 2));
const velocity = (offset / (touchBank.currentTimeStamp - touchBank.startTimeStamp)) * 1000;
const IsMissPressFromScroll = velocity > 100;

const shouldInvokePress = (!IsLongPressingIn[curState] && !IsMissPressFromScroll) || pressIsLongButStillCallOnPress;
if (shouldInvokePress && this.touchableHandlePress) {
if (!newIsHighlight && !curIsHighlight) {
// we never highlighted because of delay, but we should highlight now
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