currency exchange

In this example below you will see how to do a currency exchange with some HTML / CSS and Javascript

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This awesome code was written by 15chrjef, you can see more from this user in the personal repository.
You can find the original code on Codepen.io
Copyright 15chrjef ©

Technologies

  • HTML
  • JavaScript
<!DOCTYPE html>
<html lang="en" >

<head>
  <meta charset="UTF-8">
  <title>currency exchange</title>
  
  
  
  
  
</head>

<body>

  <div id='container'></div>
  <script src='https://cdnjs.cloudflare.com/ajax/libs/react/15.3.1/react.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.8.3/modernizr.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/react/15.3.1/react-dom.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/axios/0.15.3/axios.min.js'></script>

  

    <script  src="js/index.js"></script>




</body>

</html>

/*Downloaded from https://www.codeseek.co/15chrjef/currency-exchange-qRXrxq */
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

/* For Angular:
function Ctrl($scope) {
  $scope.title = "Currency Exchange"
}
*/
var CurrencyExchange = function (_React$Component) {
  _inherits(CurrencyExchange, _React$Component);

  function CurrencyExchange() {
    _classCallCheck(this, CurrencyExchange);

    var _this = _possibleConstructorReturn(this, (CurrencyExchange.__proto__ || Object.getPrototypeOf(CurrencyExchange)).call(this));

    _this.state = {
      data: '',
      currency: '',
      amount: '',
      currencyList: ''
    };
    return _this;
  }

  _createClass(CurrencyExchange, [{
    key: 'componentWillMount',
    value: function componentWillMount() {
      var _this2 = this;

      axios.get('https://api.fixer.io/latest').then(function (data) {
        _this2.setState({ data: data.data });
      });
    }
  }, {
    key: 'handleSubmit',
    value: function handleSubmit(e) {
      e.preventDefault();
      var _state = this.state,
          data = _state.data,
          currency = _state.currency,
          amount = _state.amount;

      var quantityExchanged = Number.isNaN(Number(amount)) === true || Number(amount) === 0 ? 1 : Number(amount);
      var currencyRates = data.rates;
      var inputtedRateValue = currencyRates[currency.toUpperCase()];
      if (inputtedRateValue || currency.toUpperCase() === 'EUR') {
        var keys = Object.keys(currencyRates);
        var myCurrencies = keys.map(function (mappedCurrency, i) {
          var mappedValue = currencyRates[mappedCurrency];
          if (currency.toUpperCase() === 'EUR') {
            inputtedRateValue = 1;
          }
          return React.createElement(
            'div',
            { key: i },
            React.createElement(
              'div',
              null,
              ' Currency Type: ',
              mappedCurrency
            ),
            React.createElement(
              'div',
              null,
              quantityExchanged * Number(mappedValue) / Number(inputtedRateValue)
            )
          );
        });
        this.setState({
          currencyList: myCurrencies
        });
      }
    }
  }, {
    key: 'handleChange',
    value: function handleChange(e) {
      if (e.target.id === 'amount') {
        this.setState({
          amount: e.target.value
        });
      } else if (e.target.id === 'currency') {
        this.setState({
          currency: e.target.value
        });
      }
    }
  }, {
    key: 'render',
    value: function render() {
      return React.createElement(
        'h1',
        null,
        'Currency Exchange',
        React.createElement(
          'form',
          { onSubmit: this.handleSubmit.bind(this) },
          React.createElement(
            'label',
            null,
            'Amount'
          ),
          React.createElement('input', {
            onChange: this.handleChange.bind(this),
            value: this.state.amount,
            id: 'amount',
            type: 'text'
          }),
          React.createElement(
            'label',
            null,
            'Currency'
          ),
          React.createElement('input', {
            onChange: this.handleChange.bind(this),
            value: this.state.currency,
            id: 'currency',
            type: 'text'
          }),
          React.createElement('input', { type: 'submit' })
        ),
        this.state.currencyList
      );
    }
  }]);

  return CurrencyExchange;
}(React.Component);

ReactDOM.render(React.createElement(CurrencyExchange, null), document.getElementById('container'));

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