JSFiddle - React, Tailwind, and code Playground

HTML

<p class="contains_photoid">My Page Title - Photo #3</p>
<p class="contains_photoid">My Page Title - Photo #3</p>
<p class="contains_photoid">My Page Title - Photo #3</p>
<p class="contains_photoid">My Page Title - Photo #3</p>
<p class="contains_photoid">My Page Title - Photo #3</p>
<p class="contains_photoid">My Page Title - Photo #3</p>

JavaScript

$(function () {
    var elements = $('.contains_photoid');
    $(document).attr('title', $(document).attr('title').replace("3", "4"));
    elements.html(elements.html().replace("3", "4"));
});