Vue Monthly Picker Component

Common errors

• [antdv:DatePicker] value provides invalidate moment time, if you want to set empty value, use null instead.

  cause The `v-model` or `value` prop was initialized or updated with an invalid or non-Moment.js date object.
  fix Ensure the bound `v-model` or `value` prop is always a valid Moment.js object, or `null` for an empty state. For example, `moment('2023-01', 'YYYY-MM')` or `moment()`.

• TypeError: Cannot read properties of undefined (reading '$moment') / 'moment is not a function'

  cause Moment.js is not correctly imported, globally available, or passed to the component, or the component is used in a Vue 3 context.
  fix Verify that Moment.js is installed (`npm install moment`) and correctly imported where `VueMonthlyPicker` is used or globally (`import moment from 'moment';`). Ensure the project is running Vue 2.x.

• Error in render: 'v-model' directives cannot update the value of a non-form control type input. Did you mean to use a two-way data binding on a component prop?

  cause This error is unlikely with `vue-monthly-picker` as it explicitly supports `v-model`. However, it can occur if Vue's `v-model` is incorrectly applied to a raw HTML element that doesn't natively support it, or if there's a misconfiguration in how the component's `value` prop and `input` event (or equivalent) are handled internally, or if trying to use Vue 3's `v-model` behavior on a Vue 2 component.
  fix Ensure `v-model` is correctly implemented by the component (which `vue-monthly-picker` does). If you encounter this, double-check your Vue version and component setup. It might also be a symptom of trying to use a Vue 2 component in a Vue 3 project.

Warnings

• deprecated This package is built for Vue 2, which has reached its End of Life (EOL) for regular support and is now in maintenance. It is not compatible with Vue 3.
  Fix: For new projects or migrations to Vue 3, consider alternatives like `vue-month-picker` (v2.0.0 for Vue 3), `Vue Datepicker` (from @vuepic/vue-datepicker), or `vue3-datepicker` which are designed for Vue 3 and often use more modern date libraries like `date-fns`.
• deprecated The component relies heavily on Moment.js, a legacy project that is no longer under active development. While widely used, Moment.js can contribute significantly to bundle size and is generally discouraged for new JavaScript projects in favor of modern alternatives like Luxon, `date-fns`, or native `Intl` APIs.
  Fix: If starting a new project, evaluate date libraries that are tree-shakeable and actively maintained. For existing projects, be aware of potential bundle size implications and consider migrating if performance becomes a concern. Refer to Moment.js documentation for migration guides if needed.
• gotcha The `v-model` binding and the `value`, `min`, `max` props require a Moment.js object. Passing a native JavaScript `Date` object or a date string will lead to unexpected behavior or errors.
  Fix: Always ensure that values bound to `v-model` and provided to `min` or `max` props are valid Moment.js objects. Initialize with `moment()` or `moment('YYYY-MM-DD')`.
• gotcha Moment.js can sometimes emit deprecation warnings, especially when parsing non-standard date strings or when its internal fallback mechanisms are triggered.
  Fix: To avoid Moment.js deprecation warnings, always pass explicitly formatted strings (e.g., ISO 8601) or a `Date` object to `moment()` constructor when applicable. You might also set `moment.suppressDeprecationWarnings = true;` if warnings are known and acceptable, but this is generally not recommended for debugging purposes.

Install

• npm install vue-monthly-picker npm
• yarn add vue-monthly-picker yarn
• pnpm add vue-monthly-picker pnpm

Imports

• VueMonthlyPicker
  wrong:

  const VueMonthlyPicker = require('vue-monthly-picker')

  correct:

  import VueMonthlyPicker from 'vue-monthly-picker'

  The component is intended for use in an ES module environment with Vue's component registration.
• Vue.component registration

  Vue.component('monthly-picker', VueMonthlyPicker);

  Alternatively, you can register it locally within a component's `components` option.
• Moment object for v-model

  data() { return { selectedMonth: moment() } }

  `v-model` expects a Moment.js object for its bound value, not a native Date object or string. Ensure Moment.js is imported and used to initialize the value.

Quickstart

This quickstart demonstrates how to register and use `vue-monthly-picker` globally, binding a Moment.js object with `v-model` and setting min/max selectable dates.

import Vue from 'vue';
import VueMonthlyPicker from 'vue-monthly-picker';
import moment from 'moment';

Vue.component('my-monthly-picker', VueMonthlyPicker);

new Vue({
  el: '#app',
  data() {
    return {
      selectedMonth: moment(), // Initialize with a moment object
      minDate: moment().subtract(1, 'year'),
      maxDate: moment().add(1, 'year')
    }
  },
  template: `
    <div id="app">
      <p>Selected Month: {{ selectedMonth ? selectedMonth.format('YYYY-MM') : 'None' }}</p>
      <my-monthly-picker 
        v-model="selectedMonth"
        :min="minDate"
        :max="maxDate"
        placeHolder="Select a month..."
        :clearOption="true"
        dateFormat="MMMM YYYY"
      />
      <p>Choose a month from the picker above.</p>
    </div>
  `
});