js

new Range()

html

<p>First paragraph.</p>
<p>Second paragraph.</p>
<p>Third paragraph.</p>
<p>Fourth paragraph.</p>

js

const paragraphs = document.querySelectorAll("p");

// Create new range
const range = new Range();

// Start range at second paragraph
range.setStartBefore(paragraphs[1]);

// End range at third paragraph
range.setEndAfter(paragraphs[2]);

// Get window selection
const selection = window.getSelection();

// Add range to window selection
selection.addRange(range);