transform-class-properties

transform-class-properties

Automatically transforms values of class properties.

Prerequisites

• TypeScript >= 1.5

• Enable the experimentalDecorators in tsconfig.json.

Note: ES5 is min target minimun to build.

Installation

npm install transform-class-properties --save

or

yarn add transform-class-properties

Usage

import {
  Float,
  RemoveNonNumeric,
  ToUpperCase,
  transform,
  Trim
} from 'transform-class-properties';

class Book {
  @ToUpperCase()
  @Trim()
  public title: string;

  @Float(2)
  public price: number;

  @RemoveNonNumeric()
  public issn: string;
}

const book1 = new Book();
book1.title = '    My first book    ';
book1.price = 12.3210;
book1.issn = '1234-5679'

console.log(transform(book1)); // Book { title: 'MY FIRST BOOK', price: 12.32, issn: '12345679' }

Decorators

Decorator	Description	Class property type
@Append(additionalValue: string | number)	Adds value at the end.	string
@Capitalize()	Capitalize the first letter and lowercase the rest.	string
@Float(fractionDigits?: number)	Converts number to float.	number
@Integer()	Converts number to integer.	number
@Prepend(additionalValue: string | number)	Adds value at the beginning.	string
@Regex(expression: RegExp)	Returns matched value with regular expression.	string
@RemoveNonNumeric()	Removes anything non-numeric character.	string
@RemoveNumeric()	Removes numeric characters.	string
@Replace(searchValue: string | RegExp, replaceValue: string)	Find and replace value.	string
@ToLowerCase()	Lower case characters.	string
@ToUpperCase()	Upper case characters.	string
@Trim()	Trim characters.	string

License

MIT