shepazu · April 6, 2022 04:45
diff --git a/VanillaJS_Academy-convert-weight.html b/VanillaJS_Academy-convert-weight.html
 <!DOCTYPE html>
 <html lang="en">
 <head>
  <meta charset="utf-8">
  <title>Convert Weight Library</title>
  <meta name="viewport" content="width=device-width, initial-scale=1.0">

  <style type="text/css">
    body {
      margin: 0 auto;
      max-width: 40em;
      width: 88%;
    }
  </style>
 </head>
 <body>

  <h1>Convert Weight Library</h1>

  <p>All of the magic here happens in the console.</p>


  <script>
 			/**
       * Converts metric weight units
       */
 			const convert = (function () {

 				// Default unit of weight
 				let defaultUnits = 'pound';
        const weightRatios = {
          'grams': {
            'ratio': 1,
            'abbr': 'g'
          },
          'milligrams': {
            'ratio': 0.001,
            'abbr': 'mg'
          },
          'kilograms': {
            'ratio': 1000,
            'abbr': 'kg'
          }
        };

 				/**
 				 * Convert between arbitary gram units, using the full unit names or their abbreviations
 				 * @param {Number} weight The starting weight
 				 * @param {string} fromUnit The starting unit, using the full unit name or its abbreviation
 				 * @param {string} weigtoUnitht The target unit, using the full unit name or its abbreviation
 				 */
        function units ( weight, fromUnit, toUnit ) {
          const fromObj = (weightRatios[fromUnit]) ? weightRatios[fromUnit] : weightRatios[getUnitByAbbr(fromUnit)[0]];
          const toObj = (weightRatios[toUnit]) ? weightRatios[toUnit] : weightRatios[getUnitByAbbr(toUnit)[0]];
          return `${(+weight) * (fromObj?.ratio / toObj?.ratio)} ${toObj?.abbr}`;
        }

        function getUnitByAbbr (abbr) {
          return Object.keys(weightRatios).filter((unit) => {
            return weightRatios[unit].abbr === abbr;
          });
        }

 				/**
 				 * Convert grams to milligrams
 				 * @param {Number} weight The starting weight
 				 */
        function gramsToMg ( weight ) {
          return (+weight) * 1000;
        }

        /**
 				 * Convert grams to kilograms
 				 * @param {Number} weight The starting weight
 				 */
        function gramsToKg ( weight ) {
          return (+weight) / 1000;
        }

 				/**
 				 * Convert milligrams to grams
 				 * @param {Number} weight The starting weight
 				 */
        function mgToGrams ( weight ) {
          return (+weight) / 1000;
        }

 				/**
 				 * Convert kilograms to grams
 				 * @param {Number} weight The starting weight
 				 */
         function kgToGrams ( weight ) {
          return (+weight) * 1000;
        }
        
 				/**
 				 * Convert milligrams to kilograms
 				 * @param {Number} weight The starting weight
 				 */
        function mgToKg ( weight ) {
          return (+weight) / 1000000;
        }

 				/**
 				 * Convert kilograms to milligrams
 				 * @param {Number} weight The starting weight
 				 */
         function kgToMg ( weight ) {
          return (+weight) * 1000000;
        }

 				// Export public methods
 				return { units, gramsToMg, gramsToKg, mgToGrams, mgToKg, kgToGrams, kgToMg };

 			})();



      // returns 42000
 			console.log('gramsToMg(42)', convert.gramsToMg(42));
      console.log('correct:', '42000');

      // returns 0.042
 			console.log('gramsToKg(42)', convert.gramsToKg(42));
      console.log('correct:', '0.042');

      // returns 0.000042
 			console.log('mgToKg(42)', convert.mgToKg(42));
      console.log('correct:', '0.000042');


      // returns 42000
 			console.log('units(42, "grams", "milligrams")', convert.units(42, 'grams', 'milligrams'));
      console.log('correct:', '42000');

      // returns 0.042
 			console.log('units(42, "grams", "kilograms")', convert.units(42, 'grams', 'kilograms'));
      console.log('correct:', '0.042');

      // returns 0.000042
 			console.log('units(42, "milligrams", "kilograms")', convert.units(42, 'milligrams', 'kilograms'));
      console.log('correct:', '0.000042');

      // returns 42000000
 			console.log('units(42, "kg", "mg")', convert.units(42, 'kg', 'mg'));
      console.log('correct:', '42000000');

      // returns 0.042
 			console.log('units(42, "mg", "g")', convert.units(42, 'mg', 'g'));
      console.log('correct:', '0.042');

  </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title>Convert Weight Library</title>
	<meta name="viewport" content="width=device-width, initial-scale=1.0">

	<style type="text/css">
	body {
	margin: 0 auto;
	max-width: 40em;
	width: 88%;
	}
	</style>
	</head>
	<body>

	<h1>Convert Weight Library</h1>

	<p>All of the magic here happens in the console.</p>


	<script>
	/**
	* Converts metric weight units
	*/
	const convert = (function () {

	// Default unit of weight
	let defaultUnits = 'pound';
	const weightRatios = {
	'grams': {
	'ratio': 1,
	'abbr': 'g'
	},
	'milligrams': {
	'ratio': 0.001,
	'abbr': 'mg'
	},
	'kilograms': {
	'ratio': 1000,
	'abbr': 'kg'
	}
	};

	/**
	* Convert between arbitary gram units, using the full unit names or their abbreviations
	* @param {Number} weight The starting weight
	* @param {string} fromUnit The starting unit, using the full unit name or its abbreviation
	* @param {string} weigtoUnitht The target unit, using the full unit name or its abbreviation
	*/
	function units ( weight, fromUnit, toUnit ) {
	const fromObj = (weightRatios[fromUnit]) ? weightRatios[fromUnit] : weightRatios[getUnitByAbbr(fromUnit)[0]];
	const toObj = (weightRatios[toUnit]) ? weightRatios[toUnit] : weightRatios[getUnitByAbbr(toUnit)[0]];
	return `${(+weight) * (fromObj?.ratio / toObj?.ratio)} ${toObj?.abbr}`;
	}

	function getUnitByAbbr (abbr) {
	return Object.keys(weightRatios).filter((unit) => {
	return weightRatios[unit].abbr === abbr;
	});
	}

	/**
	* Convert grams to milligrams
	* @param {Number} weight The starting weight
	*/
	function gramsToMg ( weight ) {
	return (+weight) * 1000;
	}

	/**
	* Convert grams to kilograms
	* @param {Number} weight The starting weight
	*/
	function gramsToKg ( weight ) {
	return (+weight) / 1000;
	}

	/**
	* Convert milligrams to grams
	* @param {Number} weight The starting weight
	*/
	function mgToGrams ( weight ) {
	return (+weight) / 1000;
	}

	/**
	* Convert kilograms to grams
	* @param {Number} weight The starting weight
	*/
	function kgToGrams ( weight ) {
	return (+weight) * 1000;
	}

	/**
	* Convert milligrams to kilograms
	* @param {Number} weight The starting weight
	*/
	function mgToKg ( weight ) {
	return (+weight) / 1000000;
	}

	/**
	* Convert kilograms to milligrams
	* @param {Number} weight The starting weight
	*/
	function kgToMg ( weight ) {
	return (+weight) * 1000000;
	}

	// Export public methods
	return { units, gramsToMg, gramsToKg, mgToGrams, mgToKg, kgToGrams, kgToMg };

	})();



	// returns 42000
	console.log('gramsToMg(42)', convert.gramsToMg(42));
	console.log('correct:', '42000');

	// returns 0.042
	console.log('gramsToKg(42)', convert.gramsToKg(42));
	console.log('correct:', '0.042');

	// returns 0.000042
	console.log('mgToKg(42)', convert.mgToKg(42));
	console.log('correct:', '0.000042');


	// returns 42000
	console.log('units(42, "grams", "milligrams")', convert.units(42, 'grams', 'milligrams'));
	console.log('correct:', '42000');

	// returns 0.042
	console.log('units(42, "grams", "kilograms")', convert.units(42, 'grams', 'kilograms'));
	console.log('correct:', '0.042');

	// returns 0.000042
	console.log('units(42, "milligrams", "kilograms")', convert.units(42, 'milligrams', 'kilograms'));
	console.log('correct:', '0.000042');

	// returns 42000000
	console.log('units(42, "kg", "mg")', convert.units(42, 'kg', 'mg'));
	console.log('correct:', '42000000');

	// returns 0.042
	console.log('units(42, "mg", "g")', convert.units(42, 'mg', 'g'));
	console.log('correct:', '0.042');

	</script>
	</body>
	</html>