Add id to elements

Work with pagedjs v. min: 0.2.0

This script has no dependencies.

This script add id to all the elements, unless it already has one.
Pretty useful to have custom or manual layout.

Usage

Add the script to your head after pagedjs has been called

<script src="https://pagedjs.org/plugins/pagedjs-addid.js"></script>

The code

// Define here the tags you want to give id  
let tags = ["figure", "figcaption", "img", "ol", "ul", "li", "p", "img", "table", "h1", "h2", "h3", "h4", "div", "aside"];


// Set the handler 
class addId extends Paged.Handler {
  constructor(chunker, polisher, caller) {
    super(chunker, polisher, caller);
  }

  beforeParsed(content) {
    addIDtoEachElement(content);
  }
}

Paged.registerHandlers(addId);


function addIDtoEachElement(content) {
  let total = 0;
  tags.forEach( tag => {
    content.querySelectorAll(tag).forEach((el, index) => {
      if (!el.id) {
        el.id = `el-${el.tagName.toLowerCase()}-${index}`;
        total++ 
      }
    });
  })
  console.log(`added ${total} ids!` )
}