Utilizing Vue 2.6 with vue class component along with typescript.
Here is the current code snippet:
private validateField(fieldType: string, e: string) {
this[fieldType] = e.length > 0
}
An error is being thrown:
Error TS7053: Element implicitly has an 'any' type because expression of type 'string' can't be used to index type 'Index'. No index signature with a parameter of type 'string' was found on type 'Index'.
Seeking recommendations on how to properly add signatures in this scenario?
A solution to the issue at hand involves creating an interface called 'ILookup':
interface ILookup<T> {
[key: string]: T;
}
The next step is to have the Vue class implement this newly created interface:
export default class App extends Vue implements ILookup<any> {
[index: string]: any;
private validateField(fieldType: string, e: string) {
this[fieldType] = e.length > 0
}
}
When implementing the interface, it's necessary to use 'any' as the type parameter since Vue utilizes a variety of types that can be indexed on the component object. For instance, using 'boolean' as the type parameter results in compilation errors like:
interface ILookup<T> {
[key: string]: T;
}
export default class App extends Vue implements ILookup<boolean> {
[index: string]: boolean;
private validateField(fieldType: string, e: string) {
this[fieldType] = e.length > 0
}
}
This leads to errors such as:
TS2411: Property '$attrs' of type 'Record' is not assignable to string index type 'boolean'.
and:
TS2411: Property '$children' of type 'Vue[]' is not assignable to string index type 'boolean'.
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