I am researching about making a Vue component using class and found out this library
https://github.com/kaorun343/vue-property-decorator#Provide
In the example as below:
import { Vue, Component, Prop } from 'vue-property-decorator'
@Component
export default class YourComponent extends Vue {
@Prop(Number) readonly propA: number | undefined
@Prop({ default: 'default value' }) readonly propB!: string
@Prop([String, Boolean]) readonly propC: string | boolean | undefined
}
What is the !: meaning in the code
propB!: string
