When working on a web application written in TypeScript, there is a feature where users can add additional JavaScript functions that will be parsed at runtime (new function(Function as String)) for execution. These functions should return an object defined in TypeScript as class Script. However, if the script object does not contain specific functions, it is considered invalid. My goal is to throw an exception if any required functions are missing.
Using a TypeScript cast is not viable as it is a compile-time operation.
One approach I thought of is to assign the parsed object to the Script object's constructor and then check for missing properties. Here is a rough example to illustrate the idea:
export class Script {
constructor(object: Script) {
this.getDefaultValue = object.getDefaultValue;
this.isAvailable = object.isAvailable;
this.isValid = object.isValid;
this.isInRange = object.isInRange;
this.isDataFormat = object.isDataFormat;
for (let property in this){
if (!this[property]){
throw new Error(property + ' is missing.');
}
}
}
getDefaultValue: any;
isAvailable: (containerSetId: number) => boolean;
isValid: (value: any) => boolean;
isInRange: (value: any) => any;
isDataFormat: (value: any) => boolean;
}
However, I am wondering if there is a more elegant solution to handle this scenario.