142. lit-html 1 - tagged templates

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According to lit-html homepage,

lit-html lets you write HTML templates in JavaScript, then efficiently render and re-render those templates together with data to create and update DOM

This video explains it pretty well about how it works. Let's take a look at the example.

import {html, render} from 'lit-html'
const helloTemplate = (name) => html`<div>Hello ${name}!</div>`

// This renders <div>Hello Steve!</div> to the document body
render(helloTemplate('Steve'), document.body)

// This updates to <div>Hello Kevin!</div>, but only updates the ${name} part
render(helloTemplate('Kevin'), document.body);

The magic happens in the second call of render() which only updates the necessary parts.

But there will be a series of problems on BFE.dev leading to that, here you are asked to :

implement html() and render() to make above example work, without considering the rerender, so html() could just return the raw HTML string.

The input data are all valid.

Let's try to solve this problem within 10 mintues.