Include a subsection heading in a checklist, ensuring it is only added once

I am looking to enhance a list by adding a subheader. Currently, a subheader is added to every entry with today's date, but I want it to be set only once. The issue arises when trying to access the updated value of todaySubheader within the <span v-if="todaySubheader.

Here is the HTML code snippet:

<template v-for="(meetup, index) in filteredItems">
            <v-subheader
              v-if="checkIsToday(meetup.date)"
              inset
            >
            <span v-if="todaySubheader === false">TODAY</span>
            </v-subheader>

And here is the SCRIPT code snippet:

data () {
    return {
      todaySubheader: false,
[...]
checkIsToday (val) {
  if (val && this.todaySubheader === false) {
    this.todaySubheader = true
  }
  return isToday(new Date(val))
},

Is there a way to effectively retrieve the updated value of this.todaySubheader in the v-if="todaySubheader condition?

javascriptvue.jsvuejs2vuetify.jsdate-fns

Answer №1

Instead of accessing todaySubheader, it is recommended not to do so as it changes multiple times in the v-for loop when calling the function. Consider obtaining the index of the first occurrence of today meetup: 

<v-subheader v-if="index === todayIndex"
...
computed: {
  todayIndex() {
    return this.filteredItems.findIndex(v => isToday(new Date(v.date) ) )
  },

Answer №2

To handle this scenario, you can establish a global JavaScript variable:

var todayAdded = false;

Then, modify your checkToday method as follows:

checkIsToday(val) {
  if (isToday(new Date(val))) {
    if (!todayAdded)
       todayAdded = true;
    return true;
  }
  return false;  
},

Finally, update your HTML like so:

<template v-for="(meetup, index) in filteredItems">
            <v-subheader
              v-if="checkIsToday(meetup.date)">
            <span v-if="!todayAdded">TODAY</span>
            </v-subheader>

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