Streaming with [email protected]

[ericmorand]

As you may know, the next version of Twing is just around the corner. In addition to bringing fully types nodes and not relying on JavaScript code evaluation to run, it also supports streaming out of the box. And, well, it's amazing.

import {createEnvironment, createArrayLoader, createOutputBuffer, createFunction} from "twing";

const environment = createEnvironment(createArrayLoader({
    index: `Wait for it...
{% flush %}
{% do wait(1000) %}
┌─────┐
{% for i in range(0,100,10) %}
{% do wait(100) %}
│ {{ '%03d'|format(i) }} │
{% flush %}
{% endfor %}
└─────┘
...and done!
`
}));

environment.addFunction(createFunction('wait', (delay: number) => {
    return new Promise((resolve) => {
        setTimeout(resolve, delay);
    });
}, [{
    name: 'delay'
}]));

environment.loadTemplate("index")
    .then((template) => {
        const outputBuffer = createOutputBuffer();
        
        outputBuffer.outputStream.pipe(process.stdout);
        
        return template.render({title: "My Page title"}, outputBuffer);
    });