@tsed/engines

Ts.ED Engines

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Template engine consolidation library (inspired from consolidate) written in TypeScript.

Feature

• Support multiple engine library,
• Extendable - You can register your own engine,
• Configurable,
• Agnostic from Express/Koa (but compatible with Express).

Installation

npm install @tsed/engines

Supported template engines

Some package has the same key name, @tsed/engines will load them according to the order number. For example with dust, @tsed/engines will try to use in this order: dustjs-helpers and dustjs-linkedin. If dustjs-helpers is installed, dustjs-linkedin will not be used by consolidate.

Name	Package Name / Order	Website / State
atpl	npm install atpl	-
bracket	npm install bracket-template	-
dot	npm install dot	(website)
dust	npm install dustjs-helpers (2) or npm install dustjs-linkedin (3)	(website)
ect	npm install ect	(website)
ejs	npm install ejs	(website)
hamlet	npm install hamlet	-
hamljs	npm install hamljs	-
haml-coffee	npm install haml-coffee	-
handlebars	npm install handlebars	(website)
hogan	npm install hogan.js	(website)
htmling	npm install htmling	-
jazz	npm install jazz	-
just	npm install just	-
liquor	npm install liquor	-
lodash	npm install lodash	(website)
marko	npm install marko	(website)
mote	npm install mote	(website)
mustache	npm install mustache	-
nunjucks	npm install nunjucks	(website)
plates	npm install plates	-
pug	npm install pug	(website) / (formerly jade)
ractive	npm install ractive	-
react	npm install react	-
slm	npm install slm	-
squirrelly	npm install squirrelly	(website)
swig	npm install swig-templates (2)	-
teacup	npm install teacup	-
templayed	npm install templayed	(website)
twig	npm install twig	(wiki)
twing	npm install twing	(website)
underscore	npm install underscore	(website)
vash	npm install vash	-
velocityjs	BETA	(website)
walrus	npm install walrus	(website)
whiskers	npm install whiskers	-

NOTE: you must still install the engines you wish to use, add them to your package.json dependencies.

API

You can get an engine by using engines:

import {getEngine} from "@tsed/engines";

getEngine("swig")
  .renderFile({user: "tobi"})
  .then((html) => {
    console.log(html);
  });

Or render directly a template:

import {getEngine} from "@tsed/engines";

getEngine("ejs")
  .render("<p><%= user.name %></p>")
  .then((html) => {
    console.log(html);
  });

Caching

To enable caching simply pass { cache: true }. EnginesContainer may use this option to cache things reading the file contents, compiled Functions etc. EnginesContainer which do not support this may simply ignore it. All engines that consolidate.js implements I/O for will cache the file contents, ideal for production environments. When using @tsed/engines directly: getEngine('swig').renderFile('views/page.html', { user: 'tobi', cache: true });

Using supported Express versions: app.locals.cache = true or set NODE_ENV to 'production' and Express will do this for you.

Express example

@tsed/engines can be used with Express as following:

import express from "express";
import {getEngine} from "@tsed/engines";

// assign the swig engine to .html files
app.engine("html", getEngine("swig"));

// set .html as the default extension
app.set("view engine", "html");
app.set("views", __dirname + "/views");

var users = [];
users.push({name: "tobi"});
users.push({name: "loki"});
users.push({name: "jane"});

app.get("/", function (req, res) {
  res.render("index", {
    title: "Ts.ED EnginesContainer"
  });
});

app.get("/users", function (req, res) {
  res.render("users", {
    title: "Users",
    users: users
  });
});

app.listen(3000);
console.log("Express server listening on port 3000");

Koa

@tsed/engines can be used with Koa as following:

import {getEngines} from "./getEngines.js";

var views = require("koa-views");

const render = views(__dirname + "/views", {
  engineSource: getEngines(),
  map: {
    html: "underscore"
  }
});

// Must be used before any router is used
app.use(render);
// OR Expand by app.context
// No order restrictions
// app.context.render = render()

app.use(async function (ctx) {
  ctx.state = {
    session: this.session,
    title: "app"
  };

  await ctx.render("user", {
    user: "John"
  });
});

Template Engine Instances

Template engines are exposed via the requires object, but they are not instantiated until you've called the getEngine(engine).render() method. You can instantiate them manually beforehand if you want to add filters, globals, mixins, or other engine features.

import {requires} from "consolidate";
import nunjucks from "nunjucks";

// add nunjucks to requires so filters can be
// added and the same instance will be used inside the render method
requires.set("nunjucks", nunjucks.configure());

requires.get("nunjucks").addFilter("foo", () => {
  return "bar";
});

Implement your own engine

@tsed/engines let you register your own engine by using the @ViewEngine decorator. Here an is example of pug engine implementation:

import {Engine, ViewEngine} from "@tsed/engines";

@ViewEngine("pug", {
  requires: ["pug", "then-pug"] // multiple require is possible. Ts.ED will use the first module resolved from node_modules
})
export class PugEngine extends Engine {
  protected $compile(template: string, options: any) {
    return this.engine.compile(template, options);
  }

  protected async $compileFile(file: string, options: any) {
    return this.engine.compileFile(file, options);
  }
}

See more examples in packages/engines/src/components directory.

Override engine

import {PugEngine} from "@tsed/engines";

@ViewEngine("pug", {
  requires: ["pug", "then-pug"] // multiple require is possible. Ts.ED will use the first module resolved from node_modules
})
export class CustomePugEngine extends PugEngine {
  protected $compile(template: string, options: any) {
    return super.$compile(template, options);
  }

  protected async $compileFile(file: string, options: any) {
    return super.$compileFile(file, options);
  }
}

Notes

• If you're using Nunjucks, please take a look at the exports.nunjucks.render function in packages/engines/src/components/NunjuncksEngine.ts. You can pass your own engine/environment via options.nunjucksEnv, or if you want to support Express you can pass options.settings.views, or if you have another use case, pass options.nunjucks (see the code for more insight).
• You can pass partials with options.partials
• For using template inheritance with nunjucks, you can pass a loader with options.loader.
• React To render content into a html base template (eg. index.html of your React app), pass the path of the template with options.base.

Contributors

Please read contributing guidelines here

Backers

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Sponsors

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License

The MIT License (MIT)

Copyright (c) 2016 - 2021 Romain Lenzotti

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.