CODEWITHSUNDEEP
javascriptjqueryopenweathermap
FreddieMixell
FreddieMixell

Reputation: 310

jQuery Toggle Fahrenheit/Celsius

I'm trying to create a weather app with the Open Weather Map API. I want to create a button that will allow you to toggle between Fahrenheit and Celsius. I've tried literally everything but I've gone back to the code I wrote before I tried putting a button in.

How could I implement this with my current setup?

<div class="container">

    <div class="jumbotron text-center" 
style="background-color: #00F0F8FF; font-family: 'Oswald', sans-
serif; color: black;">
        <h1>Local Weather App</h1>
        <h2><span id="town"></span></h2>
        <h2>Temperture: <span id="temp"></span></h2>
        <div id="weatherIconBox"></div>
        <h2><span id="weatherType"></span></h2>
        <button type="submit" id="btn1">F&#176;</button>
        <button type="submit" id="btn2">C&#176;</button>

    </div>
</div>

var getIP = 'http://ip-api.com/json/';
var openWeatherMap = 'http://api.openweathermap.org/data/2.5/weather'
$.getJSON(getIP).done(function(location) {
$.getJSON(openWeatherMap, {
    lat: location.lat,
    lon: location.lon,
    units: "imperial",    
}).done(function(data) {
    $('#town').html(data.name);
    $('#temp').prepend(Math.floor(data.main.temp) + '&#176;');
$('#weatherType').html(data.weather[0].description).css('textTransform', 'capitalize');
$('#weatherIconBox').prepend('<img id="weatherIcon"     src="http://openweathermap.org/img/w/' + data.weather[0].icon +     '.png"/>');

    });
});

Upvotes: 2

Views: 1510

Answers (3)

Kabir Sarin
Kabir Sarin

Reputation: 18526

When you click the "#temp" element, this code will toggle the text between celsius and fahrenheit 

var cToF = function(c) {
  return (c * (9/5)) + 32;
};

var fToC = function(f) {
  return (f - 32) * (5/9);
};

$("#temp").on("click", function() {
  var isF = $(this).data("units") === "f";

  var oldTemp = $(this).text();
  var newTemp = isF ? fToC(oldTemp) : cToF(oldTemp);
  $(this).text(newTemp);

  var newUnits = isF ? "c" : "f";
  $(this).data("units", newUnits).attr("data-units", newUnits);
 });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<h2>Temperature: <span id="temp" data-units="f">100</span></h2>

<h2>Temperture: <span id="temp"></span></h2>

Upvotes: 2

Louys Patrice Bessette
Louys Patrice Bessette

Reputation: 33933

Be cautious about the math calculation...
You have to apply the right formula!

Here is a simple toggle button doing the math.

var temp = "c";
var tempEl = $('#temp');

$("#tempToggle").on("click",function(){
  
  // Get actual shown temperature
  var tempVal = parseFloat(tempEl.val());
  
  if(temp=="f"){
    temp="c";
    // Calculate
    var converted = (tempVal-32)/(9/5);
    // Set
    tempEl.val(converted.toFixed(1));
    $(this).html("C&#176;");
  }else{
    temp="f";
    // Calculate
    var converted = (tempVal*1.8)+32;
    // Set
    tempEl.val(converted.toFixed(1));
    $(this).html("F&#176;");
  }
});
#temp{
  width:3.2em;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<input type="text" id="temp" value="20.5"> 
<button type="button" id="tempToggle">C&#176;</button>

Upvotes: 1

feng_nyc
feng_nyc

Reputation: 157

I was also using the API to create a side project.

Can you try this. By default display the data in Fahrenheit. And when you click the Celcius toggle button. Do a simple math calculation. I think the equation is ((f + 40) ÷ 1.8) − 40 = c. Then display this value.

Upvotes: 1

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