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Virtual DOM
Basics
render()

render()

Syntax: render(parentElement, newVNode?, prevVNode?, hook?)
Example: render(document.body, m('div'))

The render function is a combination of the patch() and createElement() functions. It takes a parent element and a vnode and returns a DOM node, and renders the vnode into the DOM.

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If you're seeking more granular modification and customization, check out the patch() function.

Here's an example Counter app using render():

import { _, m, render } from 'million';
 
let seconds = 0;
 
setInterval(() => {
  render(document.body, m('p', _, [`Time elapsed: ${seconds}`]));
  seconds++;
}, 1000);

Time Elapsed: 0

render() function has a standard interface that is used in many Virtual DOM libraries. First argument is a DOM node that will be used as the parent DOM reference, and the second one is a Virtual DOM to render.

m() function will instantiate a "Virtual DOM" node for an element.

Last updated on August 22, 2022