TypeScript decorator to bind constructor arguments as object properties with the same names / keys as the parameter names.

BindConstructorParametersAsProperties.ts

export default (constructor: any) => {
    const functionString = constructor.toString();
    const params = GetArgumentNames(functionString);
    
    const newConstructor: any = function (...args) {
        const newObj = new constructor(args);
        params.map((param, index) => newObj[param] = args[index]);    
        return newObj;
    }

    newConstructor.prototype = constructor.prototype;
    return newConstructor;
}

const RegExInsideParentheses = /[(][^)]*[)]/;
const RegExParenthesesAndSpaces = /[()\s]/g;
const GetArgumentNames = functionString => RegExInsideParentheses.exec(functionString)[0].replace(RegExParenthesesAndSpaces, "").split(',').map(str => str.trim());