codegen.js

function translateSource(data: string, outPath: string) {

	let paintStatements: t.Statement[] = [];
	let viewBox: number[];
	let inStyle = false;

	const parser = new html2.Parser({
		onopentag(name: string, attribs: {[s: string]: string}) {
			// ...

			else if (name === "svg") {
				// Split the viewbox string on spaces and convert to numbers
				viewBox = attribs["viewbox"].split(" ").map(Number.parseFloat);
			}

			else if (name === "style") {
				inStyle = true;
			}
		},

		ontext(data: string) {
			if (inStyle) {
				// parse CSS
			}
		},

		onclosetag(name) {
			if (name === "style") {
				inStyle = false;
			}
		}
	});