JSFiddle - React, Tailwind, and code Playground

HTML

<b>Item1</b>: This is item 1 description.

<b>Item1</b>: This is item 1 description.<b>Item2</b>: This is item 2 description.

<b>Item1</b>: <b>Item2</b>: This is item 2 description. <b>Item3</b>: This is item 3 description.<b>Item4</b>:  

<b>Item1</b>: This is item 1 description.<b>Item2</b>: This is item 2 description.    <b>Item3</b>: This is item 3 description.<b>Item4</b>:

JavaScript

var div = document.createElement('div');

div.innerHTML = document.body.innerHTML;

var b = div.getElementsByTagName('b');

for (var i = 0, length = b.length; i < length; i++) {
    console.log(b[i].textContent || b[i].innerText);
}