โคNeural Prediction Model

    express-tsx-views
    TypeScript icon, indicating that this package has built-in type declarations

    1.4.9ย โ€ขย Publicย โ€ขย Published

    Server-side JSX/TSX rendering for your express or NestJS application

    npm version Test Coverage Build Status

    Description

    With this template engine, TSX files can be rendered server-side by your Express application. Unlike other JSX express renderers, this one does not rely on JSX files being transpiled by babel at runtime. Instead, TSX files are processed once by the tsc compiler.

    For this to work, the templates are imported dynamically during rendering. And for this you have to provide a default export in your main TSX files. (Embeddable TSX components don't have to use a default export).

    Highlights

    • Fast, since the JSX/TSX files do not have to be transpiled on-the-fly with every request
    • Works with compiled files (.js / node) and uncompiled files (.tsx / ts-node, ts-jest, ...)
    • Provides the definition of React contexts on middleware level
    • Supports execution of GraphQL queries from JSX components

    Table of contents

    Usage

    $ npm install --save express-tsx-views

    You have to set the jsx setting in your TypeScript configuration tsconfig.json to the value react and to enable esModuleInterop:

    {
      "compilerOptions": {
        "jsx": "react",
        "esModuleInterop": true
      }
    }

    This template engine can be used in express and NestJS applications. The function setupReactViews() is provided, with which the engine is made available to the application.

    import { setupReactViews } from "express-tsx-views";
    
    const options = {
      viewsDirectory: path.resolve(__dirname, "../views"),
    };
    
    setupReactViews(app, options);

    The following options may be passed:

    Option Type Description Default
    viewsDirectory string The directory where your views (.tsx files) are stored. Must be specified. -
    doctype string Doctype to be used. <!DOCTYPE html>\n
    transform (html: string) => string With this optional function the rendered HTML document can be modified. For this purpose a function must be defined which gets the HTML string as argument. The function returns a modified version of the HTML string as string. -
    middlewares TsxRenderMiddleware[] A list of TsxRenderMiddleware objects that can be used to modify the render context. See Render middlewares -

    Express

    Example express app (See also example/app.ts in this project):

    import express from "express";
    import { resolve } from "path";
    import { setupReactViews } from "express-tsx-views";
    import { Props } from "./views/my-view";
    
    export const app = express();
    
    setupReactViews(app, {
      viewsDirectory: resolve(__dirname, "views"),
      prettify: true, // Prettify HTML output
    });
    
    app.get("/my-route", (req, res, next) => {
      const data: Props = { title: "Test", lang: "de" };
      res.render("my-view", data);
    });
    
    app.listen(8080);

    views/my-view.tsx:

    import React, { Component } from "react";
    import MyComponent from "./my-component";
    import { MyLayout } from "./my-layout";
    
    export interface Props {
      title: string;
      lang: string;
    }
    
    // Important -- use the `default` export
    export default class MyView extends Component<Props> {
      render() {
        return <div>Hello from React! Title: {this.props.title}</div>;
      }
    }

    NestJS

    See nestjs-tsx-views.

    express-tsx-views can also be used in NestJS. For this purpose the template engine must be made available in your main.ts:

    Render Middlewares

    Prettify

    Prettifies generated HTML markup using prettier.

    setupReactViews(app, {
      middlewares: [new PrettifyRenderMiddleware()],
    });

    Provide React Context

    Provides a react context when rendering your react view.

    // my-context.ts
    import {createContext} from 'react'
    
    export interface MyContextProps = {name: string}
    
    export const MyContext = createContext<MyContextProps | undefined>(undefined)

    Use addReactContext() to set the context in your route or in any other middleware:

    // app.ts
    
    // Route:
    app.get("/", (request: Request, res: Response) => {
      addReactContext(res, MyContext, { name: "philipp" });
    
      res.render("my-view");
    });
    
    // Middleware:
    app.use((req: Request, res: Response, next: NextFunction) => {
      addReactContext(res, MyContext, {
        name: "philipp",
      });
      next();
    });

    Now you can consume the context data in any component:

    // my-component.tsx
    import { useContext } from "react";
    import { MyContext } from "./my-context";
    
    export function MyComponent() {
      const { name } = useContext(MyContext);
      return <span>Hallo, {name}!</span>;
    }

    GraphQL

    This module supports the execution of GraphQL queries from the TSX template. For this purpose graphql, @apollo/client and cross-fetch have to be installed separately:

    $ npm install --save @apollo/client cross-fetch

    Now you can create an ApolloRenderMiddleware object and configure it as a middleware within express-tsx-views:

    import { ApolloClient, createHttpLink, InMemoryCache } from "@apollo/client";
    import { ApolloRenderMiddleware } from "express-tsx-views/dist/apollo";
    // needed to create a apollo client HTTP link:
    import { fetch } from "cross-fetch";
    
    // Apollo client linking to an example GraphQL server
    const apollo = new ApolloClient({
      ssrMode: true,
      link: createHttpLink({
        uri: "https://swapi-graphql.netlify.app/.netlify/functions/index",
        fetch,
      }),
      cache: new InMemoryCache(),
    });
    
    setupReactViews(app, {
      viewsDirectory: resolve(__dirname, "views"),
      middlewares: [new ApolloRenderMiddleware(apollo)],
    });

    Example view (see the example folder in this project):

    export interface Film {
      id: string;
      title: string;
      releaseDate: string;
    }
    
    export interface AllFilms {
      allFilms: {
        films: Film[];
      };
    }
    
    const MY_QUERY = gql`
      query AllFilms {
        allFilms {
          films {
            id
            title
            releaseDate
          }
        }
      }
    `;
    
    export interface Props {
      title: string;
      lang: string;
    }
    
    export default function MyView(props: Props): ReactElement {
      const { data, error } = useQuery<AllFilms>(MY_QUERY);
    
      if (error) {
        throw error;
      }
    
      return (
        <MyLayout lang={props.lang} title={props.title}>
          <h2>Films:</h2>
          {data?.allFilms.films.map((film) => (
            <ul key={film.id}>
              {film.title} ({new Date(film.releaseDate).getFullYear()})
            </ul>
          ))}
        </MyLayout>
      );
    }

    License

    express-tsx-views is distributed under the MIT license. See LICENSE for details.

    Install

    npm i express-tsx-views

    DownloadsWeekly Downloads

    247

    Version

    1.4.9

    License

    none

    Unpacked Size

    107 kB

    Total Files

    39

    Last publish

    Collaborators

    • pmb00