JSFiddle - React, Tailwind, and code Playground

by CoolBuys1290

HTML

<!DOCTYPE html>
    <html>

    <body>

    <br>

    <select style="float:left" id="EANDM1" class="js-example-basic-single select2-container Voltage" oninput="EqualsResistance(); EqualsCurrent()" onchange="EqualsResistance(); EqualsCurrent()">
    </select>

    <label>Voltage:</label>
    <input style="height:50%;font-size:15pt;width:1000px; border: 1px solid #000;" id="inputVoltage" type="number" oninput="EqualsResistance(); EqualsCurrent()" value="0"> </p>

    <select style="float:left" id="EANDM2" class="js-example-basic-single select2-container Current" oninput="EqualsVoltage(); EqualsResistance()" onchange="EqualsVoltage(); EqualsResistance()">
    </select>

    <p>
    <label>Current:</label>
    <input style="height:50%;font-size:15pt;width:1000px; border: 1px solid #000;" id="inputCurrent" type="number" oninput="EqualsVoltage(); EqualsResistance()" value="0"> </p>

    <select style="float:left" id="EANDM3" class="js-example-basic-single select2-container Resistance" oninput="EqualsCurrent();EqualsVoltage()" onchange="EqualsCurrent();EqualsVoltage()">
    </select>

    <p>
    <label>Resistance:</label>
    <input style="height:50%;font-size:15pt;width:1000px; border: 1px solid #000;" id="inputResistance" type="number" oninput="EqualsCurrent();EqualsVoltage()" value="0"> </p>

    <script>
     
     var units = [['Volts', 1], ['Millivolts', .001], ['Microvolts', 0.000001]];
     var selectors = document.querySelectorAll('.Voltage');
     
     for (var i = 0; i < units.length; i++) {
       for (var j = 0; j < selectors.length; j++) {
         var option = document.createElement('option');
         option.value = units[i][1];
         option.textContent = units[i][0];
         selectors[j].add(option);
       }
     }
     
      var units = [['Amps', 1], ['Milliamperes', .001], ['Microamperes', 0.000001]];
     var selectors = document.querySelectorAll('.Current');
     
     for (var i = 0; i < units.length; i++) {
       for (var j = 0; j <...