JSFiddle - React, Tailwind, and code Playground

HTML

<div class='big_wrapper' contenteditable>
    <div class="contentbox">Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet.</div>
    <div class="editbox">
        <input class="editable" id="edit-1" type="text" />
        <input class="editbutt" id="edbutt-1" type="button" value="Edit Me" />
    </div>
    <div class="contentbox">Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet.</div>
    <div class="editbox">
        <input class="editable" id="edit-2" type="text" />
        <input class="editbutt" id="edbutt-2" type="button" value="Edit Me" />
    </div>
    <div class="contentbox">Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet. Lorem Ipsum dolor set amet.</div>
</div>

JavaScript

$('.editable').prop('disabled',true);

$('.editbutt').click(function(){
    var num = $(this).attr('id').split('-')[1];
    $('#edit-'+num).prop('disabled',false).focus();
});

$('.editable').blur(function(){
    var myTxt = $(this).val();
    $.ajax({
        type: 'post',
        url:  'some_php_file.php',
        data: 'varname=' +myTxt
    });
});