canTriggerTransfer() — react Function Reference

Architecture documentation for the canTriggerTransfer() function in ResponderEventPlugin.js from the react codebase.

Function javascript BabelCompiler Validation calls 2 called by 1

Entity Profile

BabelCompiler→ Validation→ canTriggerTransfer() — react Function Reference

Dependency Diagram

graph TD
  88c5bf88_f523_ad22_659b_44e9b1fdb2cb["canTriggerTransfer()"]
  674c6180_b91e_e17d_fb2d_40a6a3631bb3["ResponderEventPlugin.js"]
  88c5bf88_f523_ad22_659b_44e9b1fdb2cb -->|defined in| 674c6180_b91e_e17d_fb2d_40a6a3631bb3
  8f2d8ef0_4fcf_28f9_e399_4b0f1d11c533["ResponderEventPlugin.extractEvents()"]
  8f2d8ef0_4fcf_28f9_e399_4b0f1d11c533 -->|calls| 88c5bf88_f523_ad22_659b_44e9b1fdb2cb
  60f92383_40f2_196e_b450_7c99b0331648["isStartish()"]
  88c5bf88_f523_ad22_659b_44e9b1fdb2cb -->|calls| 60f92383_40f2_196e_b450_7c99b0331648
  d2f15c72_7981_85cf_294a_267ee76fc3ed["isMoveish()"]
  88c5bf88_f523_ad22_659b_44e9b1fdb2cb -->|calls| d2f15c72_7981_85cf_294a_267ee76fc3ed
  style 88c5bf88_f523_ad22_659b_44e9b1fdb2cb fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/react-native-renderer/src/legacy-events/ResponderEventPlugin.js lines 645–656

function canTriggerTransfer(topLevelType, topLevelInst, nativeEvent) {
  return (
    topLevelInst &&
    // responderIgnoreScroll: We are trying to migrate away from specifically
    // tracking native scroll events here and responderIgnoreScroll indicates we
    // will send topTouchCancel to handle canceling touch events instead
    ((topLevelType === TOP_SCROLL && !nativeEvent.responderIgnoreScroll) ||
      (trackedTouchCount > 0 && topLevelType === TOP_SELECTION_CHANGE) ||
      isStartish(topLevelType) ||
      isMoveish(topLevelType))
  );
}