Preload all Advent Pro styles, then render regular style using node-canvas

advent-pro-all-styles.js

const { registerFont, createCanvas } = require('canvas');

registerFont( 'AdventPro-Bold.ttf', { family: "AdventProBold" } );
registerFont( 'AdventPro-ExtraLight.ttf', { family: "AdventProExtraLight" } );
registerFont( 'AdventPro-Light.ttf', { family: "AdventProLight" } );
registerFont( 'AdventPro-Medium.ttf', { family: "AdventProMedium" } );
registerFont( 'AdventPro-Regular.ttf', { family: "AdventProRegular" } );
registerFont( 'AdventPro-SemiBold.ttf', { family: "AdventProSemiBold" } );
registerFont( 'AdventPro-Thin.ttf', { family: "AdventProThin" } );

var canvas = createCanvas( 600, 100 );
var ctx = canvas.getContext( '2d' );

ctx.fillStyle = '#ffffff';
ctx.fillRect( 0, 0, canvas.width, canvas.height );

ctx.font = "normal normal 30px AdventProRegular";
ctx.fillStyle = '#000000';
ctx.fillText( "Now is the time for all good men.", 10, 50 );

require('fs').writeFileSync( "out.png", canvas.toBuffer('image/png') );