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[vue]生命周期 hook event #6

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siam-ese opened this issue Jan 4, 2021 · 0 comments

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siam-ese commented Jan 4, 2021

vue lifecycle hook event

可以对组件监听 hook:[lifecycle-name] 的事件，在 callhook 方法调用完成后，会传播事件

function callHook(vm, hook) {
  // #7573 disable dep collection when invoking lifecycle hooks
  pushTarget();
  var handlers = vm.$options[hook];
  var info = hook + ' hook';
  if (handlers) {
    for (var i = 0, j = handlers.length; i < j; i++) {
      invokeWithErrorHandling(handlers[i], vm, null, vm, info);
    }
  }
  if (vm._hasHookEvent) {
    vm.$emit('hook:' + hook);
  }
  popTarget();
}

siam-ese changed the title ~~vue 生命周期 hook event~~ [vue]生命周期 hook event

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