takatoh · August 4, 2018 22:28
diff --git a/fahrenheit.html b/fahrenheit.html
 <!DOCTYPE html>
 <html>
  <head>
    <meta charset="utf-8" />
    <title>Fahrenheit / Celsius converter</title>
    <script type="text/javascript">
      function convert() {
        let deg = document.getElementById("degree").value;
        let dest = document.getElementById("answer");
        let elements = document.getElementsByName("temperature");
        let a;
        for (let i = 0; i < elements.length; i++) {
          if (elements[i].checked) {
            a = elements[i].value;
            break;
          }
        }
        if (a === "fahrenheit") {
          dest.innerHTML = f2c(Number(deg));
        } else {
          dest.innerHTML = c2f(Number(deg));
        }
      }

      function f2c(deg) {
        return (deg - 32) * 5 / 9;
      }

      function c2f(deg) {
        return deg * 9 / 5 + 32;
      }

      function clearVals() {
        document.getElementById("degree").value = "";
        document.getElementById("answer").innerHTML = "";
      }

      document.addEventListener("DOMContentLoaded", function() {
        document.getElementById("convertButton").addEventListener("click", convert, false);
        document.getElementById("clearButton").addEventListener("click", clearVals, false);
      }, false);
    </script>
  </head>
  <body>
    <h1>Fahrenheit / Celsius converter</h1>
    <input type="radio" name="temperature" value="fahrenheit" checked />
      Fahrenheit into Celsius<br />
    <input type="radio" name="temperature" value="celsius" />
      Celsius into Fahrenheit<br />
    <input type="text" id="degree" />
    <button type="button" id="convertButton">convert</button><br />
    <output id="answer"></output><br />
    <button type="button" id="clearButton">clear</button>
  </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8" />
	<title>Fahrenheit / Celsius converter</title>
	<script type="text/javascript">
	function convert() {
	let deg = document.getElementById("degree").value;
	let dest = document.getElementById("answer");
	let elements = document.getElementsByName("temperature");
	let a;
	for (let i = 0; i < elements.length; i++) {
	if (elements[i].checked) {
	a = elements[i].value;
	break;
	}
	}
	if (a === "fahrenheit") {
	dest.innerHTML = f2c(Number(deg));
	} else {
	dest.innerHTML = c2f(Number(deg));
	}
	}

	function f2c(deg) {
	return (deg - 32) * 5 / 9;
	}

	function c2f(deg) {
	return deg * 9 / 5 + 32;
	}

	function clearVals() {
	document.getElementById("degree").value = "";
	document.getElementById("answer").innerHTML = "";
	}

	document.addEventListener("DOMContentLoaded", function() {
	document.getElementById("convertButton").addEventListener("click", convert, false);
	document.getElementById("clearButton").addEventListener("click", clearVals, false);
	}, false);
	</script>
	</head>
	<body>
	<h1>Fahrenheit / Celsius converter</h1>
	<input type="radio" name="temperature" value="fahrenheit" checked />
	Fahrenheit into Celsius<br />
	<input type="radio" name="temperature" value="celsius" />
	Celsius into Fahrenheit<br />
	<input type="text" id="degree" />
	<button type="button" id="convertButton">convert</button><br />
	<output id="answer"></output><br />
	<button type="button" id="clearButton">clear</button>
	</body>
	</html>