Creating PDF with JavaScript

const bag = require("bag:backend/bag")
const fe = require("bag:frontend")


const f = fe.new("out.pdf")

const str = `In olden times when wishing still helped one,
there lived a king whose daughters were all beautiful;
and the youngest was so beautiful that the sun itself,
which has seen so much, was astonished whenever it shone
in her face. Close by the king’s castle lay a great dark
forest, and under an old lime-tree in the forest was a well,
and when the day was very warm, the king’s child went out
into the forest and sat down by the side of the cool
fountain; and when she was bored she took a golden ball,
and threw it up on high and caught it; and this ball was her
favorite plaything.`.replace(/\s+/g, ' ').trim()

const fontsource = new fe.fontSource(
    { location: "CrimsonPro-Regular.ttf"}
    );
const ff = f.newFontFamily("text");
ff.addMember(fontsource, fe.fontWeight400, fe.fontStyleNormal);
const para = fe.newText();

para.settings[fe.settingSize] = 12 * bag.factor;
para.items.push(str);

const ret = f.formatParagraph(
    para,
    bag.mustSP("125pt"),
    fe.leading(14 * bag.factor),
    fe.family(ff));

const p = f.doc.newPage();
p.outputAt(bag.mustSP("1cm"), bag.mustSP("26cm"), ret[0]);
p.shipout();
f.doc.finish();