JSFiddle - React, Tailwind, and code Playground

HTML

<input id="edValue" type="text" onKeyPress="edValueKeyPress()" onKeyUp="edValueKeyPress()"><br>
   <!-- <span id="lblValue"></span> -->

<svg width="100%" height="100%" viewBox="0 0 1000 300"
     xmlns="http://www.w3.org/2000/svg" 
     xmlns:xlink="http://www.w3.org/1999/xlink">
  <defs>
    <path id="MyPath"
          d="M 100 200 
             C 200 100 300   0 400 100
             C 500 200 600 300 700 200
             C 800 100 900 100 900 100" />
  </defs>

  <use xlink:href="#MyPath" fill="none" stroke="red"  />

  <text font-family="Verdana" font-size="42.5">
    <textPath xlink:href="#MyPath" id="lblValue">
      Text should go here
    </textPath>
  </text>

  <!-- Show outline of the viewport using 'rect' element -->
  <rect x="1" y="1" width="998" height="298"
        fill="none" stroke="black" stroke-width="2" />
</svg>

JavaScript

function edValueKeyPress()
    {
        var edValue = document.getElementById("edValue");
        var s = edValue.value;
    
        var lblValue = document.getElementById("lblValue");
        lblValue.textContent = ""+s;

    }