Simple custom CheckBox component for Vue.js, compatible with v-model.

CheckBox.vue

/**
 * @usage:
 *
 *   <CheckBox label="Foo" value="foo" v-model="MySelectedValues" />
 *   <CheckBox label="Bar" value="bar" v-model="MySelectedValues" />
 *   <CheckBox label="Baz" value="baz" v-model="MySelectedValues" />
 * 
 * data(){
 *    return {
 *      MySelectedValues: [],
 *    }
 *  }
 */

<template>
  <label class="wrapper flex items-center">
    {{label}}
    <input class="checkbox" type="checkbox" :checked="isChecked" :value="value" @change="updateInput"/>
    <span class="checkmark"></span>
  </label>
</template>

<script>
export default {
  model: {
    prop: 'modelValue',
    event: 'change'
  },
  props: {
    "value": { type: String },
    "modelValue": { default: "" },
    "label": { type: String, required: true},
    "trueValue": { default: true },
    "falseValue": { default: false }
  },
  computed: {
    isChecked() {
      if (this.modelValue instanceof Array) {
        return this.modelValue.includes(this.value)
      }
      // Note that `true-value` and `false-value` are camelCase in the JS
      return this.modelValue === this.trueValue
    }
  },
  methods: {
    updateInput(event) {
      let isChecked = event.target.checked

      if (this.modelValue instanceof Array) {
        let newValue = [...this.modelValue]

        if (isChecked) {
          newValue.push(this.value)
        } else {
          newValue.splice(newValue.indexOf(this.value), 1)
        }

        this.$emit('change', newValue)
      } else {
        this.$emit('change', isChecked ? this.trueValue : this.falseValue)
      }
    }
  }
}
</script>

<style lang="postcss" scoped>
/* Customize the label (the wrapper) */
.wrapper {
  display: block;
  position: relative;
  padding-left: 35px;
  margin-bottom: 6px;
  cursor: pointer;
  font-size: 22px;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  font-size: 16px;
}

/* Hide the browser's default checkbox */
.wrapper input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

/* Create a custom checkbox */
.checkmark {
  position: absolute;
  top: 0;
  left: 0;
  height: 21px;
  width: 21px;
  border-radius: 2px;
  background-color: #eee;
  border: 1px solid #ccc;
}

/* On mouse-over, add a grey background color */
.wrapper:hover input ~ .checkmark {
  background-color: #ccc;
}

/* When the checkbox is checked, add a blue background */
.wrapper input:checked ~ .checkmark {
  background-color: #1CD4A7;
}

/* Create the checkmark/indicator (hidden when not checked) */
.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

/* Show the checkmark when checked */
.wrapper input:checked ~ .checkmark:after {
  display: block;
}

/* Style the checkmark/indicator */
.wrapper .checkmark:after {
  left: 7px;
  top: 0px;
  width: 7px;
  height: 15px;
  border: solid white;
  border-width: 0 3px 3px 0;
  -webkit-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  transform: rotate(45deg);
}
</style>