printjs分页打印字符串数据

你可以使用print-js库，它是一个用于打印的轻量级JavaScript库。

以下是如何使用print-js来分页打印字符串数据的示例：

1. 引入print-js库

<script src="https://printjs-4de6.kxcdn.com/print.min.js"></script>

2. 创建一个字符串数据

const data = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed luctus ultrices ipsum, vel porttitor felis volutpat vel. Proin id mi tempor, faucibus leo in, dignissim velit. Maecenas ut velit auctor, eleifend elit in, faucibus erat. In hac habitasse platea dictumst. Nulla facilisi. Vestibulum et leo nec nisi efficitur faucibus.";

3. 定义每页的字符数

const maxCharsPerLine = 80; // 每行最大字符数
const maxLinesPerPage = 20; // 每页最大行数

4. 分页

const pages = [];
const lines = data.split('\n');
let currentPage = [];
let currentLineCount = 0;

lines.forEach(line => {
  const words = line.split(' ');
  let currentLine = '';
  words.forEach(word => {
    if (currentLine.length + word.length + 1 <= maxCharsPerLine) {
      currentLine += word + ' ';
    } else {
      currentPage.push(currentLine.trim());
      currentLine = word + ' ';
      currentLineCount++;
    }
    if (currentLineCount >= maxLinesPerPage) {
      pages.push(currentPage);
      currentPage = [];
      currentLineCount = 0;
    }
  });
  currentPage.push(currentLine.trim());
  currentLineCount++;
});

if (currentPage.length > 0) {
  pages.push(currentPage);
}

5. 打印

pages.forEach(page => {
  const html = page.map(line => `<div>${line}</div>`).join('');
  printJS({ printable: html, type: 'html', css: 'print.css' });
});

在这个示例中，我们将字符串数据分成了多个页，并使用print-js打印每个页面。你还需要创建一个名为`print.css`的CSS文件来定义打印样式。