JSFiddle - React, Tailwind, and code Playground

HTML

<span class="myClass">data1</span>
    <span class="myClass">data2</span>
    <span class="myClass">data3</span>
    <span class="myClass">data4</span>
    <span class="myClass">data5</span>

    <br><input type="button" id="clearbutton" value="Clear Data">

JavaScript

// Using jQuery (recommended because old IEs don't support getElementsByClassName)
    $('#clearbutton').click(function() {
        $('.myClass').text('');
    });