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createOnceHandler() — vue Function Reference

Architecture documentation for the createOnceHandler() function in events.ts from the vue codebase.

Function typescript CoreRuntime InstanceState

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src/core/instance/events.ts lines 32–40

function createOnceHandler(event, fn) {
  const _target = target
  return function onceHandler() {
    const res = fn.apply(null, arguments)
    if (res !== null) {
      _target.$off(event, onceHandler)
    }
  }
}

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