Vue provides validations such as types, required fields, default values along with customized validations. You can provide an object with validation requirements to the value of props as below,
Let's take an example of user profile Vue component with possible validations,
Vue.component('user-profile', {
props: {
// Basic type check (`null` matches any type)
age: Number,
// Multiple possible types
identityNumber: [String, Number],
// Required string
email: {
type: String,
required: true
},
// Number with a default value
minBalance: {
type: Number,
default: 10000
},
// Object with a default value
message: {
type: Object,
// Object or array defaults must be returned from
// a factory function
default: function () {
return { message: 'Welcome to Vue' }
}
},
// Custom validator function
location: {
validator: function (value) {
// The value must match one of these strings
return ['India', 'Singapore', 'Australia'].indexOf(value) !== -1
}
}
}
})
