日期选择 about ngx-weui HOT 5 CLOSED

PickerComponent.html:1 ERROR TypeError: Cannot read property 'target' of undefined
    at PickerComponent._onFocus (ngx-weui-picker.js:501)
    at Object.eval [as handleEvent] (PickerComponent.html:7)
    at handleEvent (core.js:43993)
    at callWithDebugContext (core.js:45632)
    at Object.debugHandleEvent [as handleEvent] (core.js:45247)
    at dispatchEvent (core.js:29804)
    at core.js:42925
    at HTMLInputElement.<anonymous> (platform-browser.js:2668)
    at ZoneDelegate.invokeTask (zone-evergreen.js:391)
    at Object.onInvokeTask (core.js:39680)

  _onFocus() {
    arguments[0].target.blur();
  }

.weui-picker {
  position: fixed;
  width: 100%;
  left: 0;
  bottom: 0;
  z-index: 5000;
  background-color: #fff;
  padding-bottom: env(safe-area-inset-bottom);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -webkit-transform: translate(0, 100%);
  transform: translate(0, 100%);
  transition: -webkit-transform .3s;
  transition: transform .3s;
  transition: transform .3s, -webkit-transform .3s
}

.weui-picker__hd {
  display: flex;
  padding: 16px;
  padding: 16px calc(16px + env(safe-area-inset-right)) 16px calc(16px + env(safe-area-inset-left));
  position: relative;
  text-align: center;
  font-size: 17px;
  line-height: 1.4
}

.weui-picker__hd:after {
  content: " ";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 1px;
  border-bottom: 1px solid rgba(0, 0, 0, .1);
  color: rgba(0, 0, 0, .1);
  -webkit-transform-origin: 0 100%;
  transform-origin: 0 100%;
  -webkit-transform: scaleY(.5);
  transform: scaleY(.5)
}

.weui-picker__action {
  display: block;
  flex: 1;
  color: #576b95
}

.weui-picker__action:first-child {
  text-align: left;
  color: rgba(0, 0, 0, .9)
}

.weui-picker__action:last-child {
  text-align: right
}

.weui-picker__bd {
  display: flex;
  position: relative;
  background-color: #fff;
  height: 240px;
  overflow: hidden
}

.weui-picker__group {
  flex: 1;
  position: relative;
  height: 100%
}

.weui-picker__group:first-child .weui-picker__item {
  padding-left: env(safe-area-inset-left)
}

.weui-picker__group:last-child .weui-picker__item {
  padding-right: env(safe-area-inset-right)
}

.weui-picker__mask {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  margin: 0 auto;
  z-index: 3;
  background: linear-gradient(180deg, hsla(0, 0%, 100%, .95), hsla(0, 0%, 100%, .6)), linear-gradient(0deg, hsla(0, 0%, 100%, .95), hsla(0, 0%, 100%, .6));
  background-position: top, bottom;
  background-size: 100% 102px;
  background-repeat: no-repeat;
  -webkit-transform: translateZ(0);
  transform: translateZ(0)
}

.weui-picker__indicator {
  width: 100%;
  height: 34px;
  position: absolute;
  left: 0;
  top: 102px;
  z-index: 3
}

.weui-picker__indicator:before {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  height: 1px;
  border-top: 1px solid rgba(0, 0, 0, .1);
  color: rgba(0, 0, 0, .1);
  -webkit-transform-origin: 0 0;
  transform-origin: 0 0;
  -webkit-transform: scaleY(.5);
  transform: scaleY(.5)
}

.weui-picker__indicator:after {
  content: " ";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 1px;
  border-bottom: 1px solid rgba(0, 0, 0, .1);
  color: rgba(0, 0, 0, .1);
  -webkit-transform-origin: 0 100%;
  transform-origin: 0 100%;
  -webkit-transform: scaleY(.5);
  transform: scaleY(.5)
}

.weui-picker__content {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%
}

.weui-picker__item {
  height: 34px;
  line-height: 34px;
  text-align: center;
  color: rgba(0, 0, 0, .9);
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden
}

.weui-picker__item_disabled {
  color: rgba(0, 0, 0, .5)
}```