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HomeWeb Front-endJS TutorialVue-Material-Year-Calendar plug-in: What should I do if the calendar is not updated after activeDates.push?

Vue-Material-Year-Calendar plug-in: What should I do if the calendar is not updated after activeDates.push?

Vue-Material-Year-Calendar plugin: Solution to the calendar not being updated after activeDates.push

When using the Vue-Material-Year-Calendar plugin, you often encounter a problem: after adding dates to the activeDates array, the calendar interface does not update the selected status. This article will analyze the causes of the problem and provide solutions.

Problem description:

According to the official documentation, use activeDates.sync to bind the activeDates array and add date information to the array through a custom method. But even if the activeDates array already contains the date, the calendar interface still does not display the selected status.

Code example (Vue 2):

<yearcalendar :activeclass="activeclass" :activedates.sync="activedates" prefixclass="your_customized_wrapper_class" v-model="year"></yearcalendar>

data() {
  return {
    year: 2019,
    activedates: [
      { date: '2019-02-13' },
      { date: '2019-02-14', classname: 'red' },
      // ...
    ],
    activeclass: '',
  }
},

toggledate(dateinfo) {
  const index = this.activedates.indexOf(dateinfo);
  if (index === -1) {
    this.activedates.push(dateinfo);
  } else {
    this.activedates.splice(index, 1);
  }
}

The root cause and solution of the problem:

The problem is the difference in the use of .sync modifiers in Vue 2 and Vue 3.

Vue 2 solution: Remove the .sync modifier and use :activedates directly:

<yearcalendar :activeclass="activeclass" :activedates="activedates" prefixclass="your_customized_wrapper_class" v-model="year"></yearcalendar>

Vue 3 solution: use ref and add selected attribute:

 const activeDates = ref([
  { date: '2024-02-13', selected: true, className: '' },
  { date: '2024-02-14', className: 'red' },
  // ...
]);

const toggledate = (dateinfo) => {
  const index = activeDates.value.findIndex(item => item.date === dateinfo.date);
  if (index === -1) {
    activeDates.value.push({...dateinfo, selected: true});
  } else {
    activeDates.value.splice(index, 1);
  }
};

Through the above modifications, the calendar interface will correctly reflect the changes in activeDates array. The logic of the toggledate function also needs to be adjusted according to actual needs. For example, when push a new date, explicitly set selected: true . The Vue 3 example uses findIndex to find dates more accurately, avoiding the problem of potential comparison objects inconsistency. The expansion operator ...dateinfo is also used to avoid directly modifying the original object and maintaining the consistency of the data.

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