# vue/require-default-prop

require default value for props

⚙️ This rule is included in all of "plugin:vue/vue3-strongly-recommended", "plugin:vue/strongly-recommended", "plugin:vue/vue3-recommended" and "plugin:vue/recommended".

# 📖 Rule Details

This rule requires default value to be set for each props that are not marked as required (except Boolean props).

<script>
export default {
  props: {
    /* ✓ GOOD */
    a: {
      type: Number,
      required: true
    },
    b: {
      type: Number,
      default: 0
    },
    c: {
      type: Number,
      default: 0,
      required: false
    },
    d: {
      type: Boolean, // Boolean is the only type that doesn't require default
    },

    /* ✗ BAD */
    e: Number,
    f: [Number, String],
    g: [Boolean, Number],
    j: {
      type: Number
    },
    i: {
      type: Number,
      required: false
    }
  }
}
</script>

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# 🔧 Options

Nothing.

# 📚 Further Reading

Style guide - Prop definitions (opens new window)

# 🚀 Version

This rule was introduced in eslint-plugin-vue v3.13.0

# 🔍 Implementation

← vue/prop-name-casing vue/require-prop-types →