nodejs 生成海报

以下是使用NodeJS生成海报的两种方案：
1. 使用Puppeteer库调用浏览器的page对象，基于page.screenshot截图并保存到磁盘。

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();  const page = await browser.newPage();
  await page.goto('https://www.example.com');
  await page.screenshot({path: 'example.png'});
  await browser.close();
})();

2. 将HTML作为SVG的外联元素，利用SVG的API导出为图片。

const fs = require('fs');
const { createCanvas, loadImage } = require('canvas');
const canvas = createCanvas(200, 200);
const ctx = canvas.getContext('2d');

(async () => {
  const image = await loadImage('path/to/image.jpg');
  ctx.drawImage(image, 0, 0, canvas.width, canvas.height);
  fs.writeFileSync('output.png', canvas.toBuffer());
})();