const regex = /(\w+):\s?(\w+);/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(\\w+):\\s?(\\w+);', 'gm')
const str = ` AllowMagazine: boolean;
Badge: string;
BirthDay: number;
Blocked: boolean;
BusNr: string;
CardQty: number;
CityID: number;
CityName: string;
CityZip: string;
CountryISOCode: string;
CustomerID: number;
DirectReduction: boolean;
Email: string;
FirstName: string;
Gender: string;
IsActive: boolean;
LanguageISO: string;
LastName: string;
Mailing: boolean;
Mobile: string;
Phone: string;
Pincode: string;
Reduction: number;
ReductionAllowed: boolean;
Street: string;
StreetNr: string;
`;
const subst = `@property {$2} $1`;
// The substituted value will be contained in the result variable
const result = str.replace(regex, subst);
console.log('Substitution result: ', result);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions