ts-transform-graphql-tag

Compiles GraphQL tagged template strings using graphql-tag in TypeScript files.

The plugin was mostly inspired by great Babel's plugin babel-plugin-graphql-tag.

Motivation

Compiling GraphQL queries at the build time:

• reduces the script initialization time; and
• removes the graphql-tag dependency

Removing the graphql-tag dependecy from the bundle saves approx. 50 KB.

Implementation

• Searches for imports of graphql-tag and removes them.
• Searches for tagged template literals with gql identifier and compiles them using graphql-tag.

Installation

The following command adds the packages to the project as a development-time dependency:

npm i --save-dev ts-transform-graphql-tag

This also depends on graphql and graphql-tag so you'll need those in your project as well (if you don't already have them):

# usually, this is a production dependency
npm i graphql

# add this as a development-time dependency
npm i --save-dev graphql-tag

Usage

Integration with Webpack

If you using Webpack, there are two popular TypeScript loaders that support specifying custom transformers:

• awesome-typescript-loader, supports custom transformers since v3.1.3
• ts-loader, supports custom transformers since v2.2.0

Both loaders use the same setting getCustomTransformers which is an optional function that returns { before?: Transformer[], after?: Transformer[] }. In order to inject the transformer into compilation, add it to before transformers array, like: { before: [getTransformer()] }.

awesome-typescript-loader

In the webpack.config.js file in the section where awesome-typescript-loader is configured as a loader:

// 1. import `getTransformer` from the module
var getTransformer = require('ts-transform-graphql-tag').getTransformer

// 2. create a transformer and add getCustomTransformer method to the loader config
var config = {
  /// ...
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        loader: 'awesome-typescript-loader',
        options: {
          // ... other loader's options
          getCustomTransformers: () => ({ before: [getTransformer()] })
        }
      }
    ]
  }
  /// ...
}

ts-loader

In the webpack.config.js file in the section where ts-loader is configured as a loader:

// 1. import `getTransformer` from the module
var getTransformer = require('ts-transform-graphql-tag').getTransformer

// 2. create a transformer and add getCustomTransformer method to the loader config
var config = {
  // ...
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        loader: 'ts-loader',
        options: {
          // ... other loader's options
          getCustomTransformers: () => ({ before: [getTransformer()] })
        }
      }
    ]
  }
  // ...
};

Integration with FuseBox

FuseBox is a blazing fast (TypeScipt first) bundler/module loader.

In the fuse.ts file, you can configured like this:

// 1. import `getTransformer` from the module
import { getTransformer } from "ts-transform-graphql-tag"

// 2. create a transformer and add it to the `transformers.before` config
const fuse = FuseBox.init({
  // ... other init options
  transformers: {
    before: [
      getTransformer()
    ]
  }
})

More information about using TypeScript custom transformer in FuseBox.

Example

before

// with transformer
import gql from "graphql-tag"
export default gql`query Hello {hello}`

after

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = { "kind": "Document", "definitions": [{ "kind": "OperationDefinition", "operation": "query", "name": { "kind": "Name", "value": "Hello" }, "variableDefinitions": [], "directives": [], "selectionSet": { "kind": "SelectionSet", "selections": [{ "kind": "Field", "alias": undefined, "name": { "kind": "Name", "value": "hello" }, "arguments": [], "directives": [], "selectionSet": undefined }] } }], "loc": { "start": 0, "end": 19, "source": { "body": "query Hello {hello}", "name": "GraphQL request", "locationOffset": { "line": 1, "column": 1 } } } };

Need more example? run npm test and checkout test/fixture/actual/*.js.

Related

• graphql-tag

Thanks

• babel-plugin-graphql-tag
• ts-transform-img
• typescript-plugin-styled-components