TypeScript.ContractGenerator

A tool that can generate TypeScript types from C# classes

	Build Status
TypeScript.ContractGenerator
TypeScript.ContractGenerator.Roslyn
TypeScript.ContractGenerator.Cli
Build

Release Notes

See CHANGELOG.

How to Use

First, define types that need type generation:

public class FirstType
{
    public string StringProp { get; set; }
    public int IntProp { get; set; }
}

public class SecondType
{
    public string[] StringArray { get; set; }
    public FirstType FirstTypeProp { get; set; }
}

Then generate TypeScript files with:

var generator = new TypeScriptGenerator(TypeScriptGenerationOptions.Default, CustomTypeGenerator.Null, new RootTypesProvider(typeof(SecondType)));
generator.GenerateFiles("./output");

By default, this will generate file with name .ts with following content:

// tslint:disable
// TypeScriptContractGenerator's generated content

export type SecondType = {
    stringArray?: null | string[];
    firstTypeProp?: null | FirstType;
};
export type FirstType = {
    stringProp?: null | string;
    intProp: number;
};

If you want generated files to have different name or to generate some typings differently, you should pass your own implementation of ICustomTypeGenerator to TypeScriptGenerator.

Generation options

LinterDisableMode

Use /* eslint-disable */ or // tslint:disable comment in generated files. EsLint is default option.

EnableOptionalProperties

This option is enabled by default. When enabled produces optional properties for members which may contain nulls.

export type SomeType = {
    somePropertyWithNullableValue?: typeDefinition;
    somePropertyWithNonNullableValue: typeDefinition;
};

When disabled, all properties produced as required.

UseGlobalNullable

This option is disabled by default. When enabled, global Nullable<T> is used instead of union null | T

NullabilityMode

NullabilityMode has 4 options:

• None - all generated properties are not null
• Pessimistic (default) - generates Nullable property for properties that have no JetBrains nullability attributes
• Optimistic - generates not null property for properties that have no JetBrains nullability attributes
• NullableReference - generates not null properties based on C# 8 Nullable Reference Type attributes

Options Pessimistic or Optimistic can be combined with NullableReference option, this way generator first looks for C# 8 Nullable Reference Type attributes, then JetBrains nullability attributes

Attributes

There is ContractGeneratorIgnore attribute that can be applied to properties and makes generator skip current property.

Roslyn usage

To use Roslyn you should get a Compilation object of your project. It can be done with helper method AdhocProject.GetCompilation(string[] directories, string[] assemblies). You can then get customization info from this compilation by calling extension method compilation.GetCustomization() and call TypeScriptGenerator with this customization:

var (customTypeGenerator, typesProvider) = AdhocProject.GetCompilation(directories, assemblies).GetCustomization();
var typeGenerator = new TypeScriptGenerator(options, customTypeGenerator, typesProvider);
typeGenerator.GenerateFiles(outputDirectory);

dotnet tool usage

Install tool with command:

dotnet tool install -g SkbKontur.TypeScript.ContractGenerator.Cli

Use tool with command:

dotnet ts-gen --assembly ./Api/bin/Api.dll --outputDir ./src/Api

dotnet tool also supports Roslyn:

dotnet ts-gen --directory ./Api;./Core --assembly ./External/Dependency.dll --outputDir ./src/Api