Let's Make a Vue-Powered Monthly Calendar

This Vue.js powered monthly calendar tutorial demonstrates building a reusable calendar component. Let's break down the process, focusing on clarity and conciseness. The original text was quite detailed, so this version aims for a more streamlined explanation.

This tutorial shows how to create a Vue.js component for a monthly calendar view, avoiding the complexity of plugins or external calendars. The goal is a single-page application fetching calendar data from the lightweight Day.js library. Key features include:

• Month view grid displaying current month's days.
• Complete grid display including previous and next month's days.
• Current date highlighting.
• Display of the selected month's name.
• Previous/next month navigation.
• "Today" button for quick navigation to the current month.

Step 1: Basic Markup (CalendarMonth.vue)

The calendar's structure is divided into three sections: a header (showing the month and navigation controls), a weekday header, and the main calendar grid. This is represented in a basic template:

<template>
  <div>
    <div>
      <calendar-date-indicator :selected-date="selectedDate"></calendar-date-indicator>
      <calendar-date-selector :current-date="today" :selected-date="selectedDate"></calendar-date-selector>
    </div>
    <calendar-weekdays></calendar-weekdays>
    <ol>
      <calendar-month-day-item v-for="day in days" :key="day.date" :day="day" :is-today="day.date === today" :is-current-month="day.isCurrentMonth"></calendar-month-day-item>
    </ol>
  </div>
</template>

Step 2: Header Components

Two components manage the header:

• CalendarDateIndicator: Displays the selected month using Day.js formatting.
• CalendarDateSelector: Provides buttons for navigating to the previous, current, and next month. It emits events to update the selected date in the parent component.

Step 3: Calendar Grid Components

Two more components handle the grid:

• CalendarWeekdays: Displays the abbreviated names of weekdays (Mon, Tue, etc.).
• CalendarMonthDayItem: Represents a single day in the grid, highlighting the current date.

Step 4: Generating Calendar Data

The core logic involves using Day.js to dynamically generate the calendar data. This includes:

• Determining the number of days in the selected month.
• Calculating the days from the previous and next months needed to fill the grid.
• Combining these days into a single array for rendering.

Day.js plugins (weekday and weekOfYear) are used to determine the starting day of the week and correctly position the dates within the grid. The calculation involves determining the weekday of the first and last days of the month to correctly add leading and trailing days from adjacent months.

This streamlined explanation provides a high-level overview of the calendar's construction, focusing on the key components and their interactions. The original tutorial's detailed code snippets are condensed for brevity. Refer to the original for the complete code implementation.

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