6.2 KiB
6.2 KiB
id, title, challengeType, isBeta
| id | title | challengeType | isBeta |
|---|---|---|---|
| 5ddb965c65d27e1512d44dd4 | Part 59 | 0 | true |
Description
Later we will want to remove these extra calorieInput elements that we added. This will happen when the user pushes the "Clear" button.
To keep track of them, add the class name extra-cal-control to the calorieInput element.
Instructions
Tests
tests:
- text: See description above for instructions.
testString: assert( code.replace(/\s/g, '').match(/calorieInput\.classList\.add\([\'\"\`]extra-cal\-control[\'\"\`]\)/) );
Challenge Seed
<script>
document.getElementById('calorie-form').onsubmit = calculate;
function calculate(e) {
e.preventDefault();
const total = Array.from(document.getElementsByClassName('cal-control'))
.map(meal => Number(meal.value))
.reduce((accumulator, currentValue) => accumulator + currentValue, 0);
const maxCalories = document.getElementById('female').checked ? 2000 : 2500;
const difference = total - maxCalories;
const surplusOrDeficit = difference > 0 ? 'Surplus' : 'Deficit';
const output = document.getElementById('output');
const result = document.createElement('h3');
result.className = 'green-text';
const resultText = document.createTextNode(
`${Math.abs(difference)} Calorie ${surplusOrDeficit}`
);
result.appendChild(resultText);
output.appendChild(result);
const line = document.createElement('hr');
output.appendChild(line);
const recommended = document.createElement('h4');
const recommendedText = document.createTextNode(
`${maxCalories} Recommended Calories`
);
recommended.appendChild(recommendedText);
output.appendChild(recommended);
const consumed = document.createElement('h4');
consumed.innerHTML = `${total} Consumed Calories`;
output.appendChild(consumed);
output.setAttribute('class', 'bordered-class');
output.style.backgroundColor = '#FFF9C4';
}
document.getElementById('add').onclick = function() {
const foodInput = document.createElement('input');
foodInput.placeholder = 'food name';
foodInput.classList.add('food-control');
document.getElementById('entries').appendChild(foodInput);
const calorieInput = document.createElement('input');
calorieInput.setAttribute('type', 'number');
calorieInput.setAttribute('min', '0');
calorieInput.classList.add('cal-control');
};
</script>
Before Test
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<meta name="description" content="" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link rel="stylesheet" href="styles.css" />
</head>
<body>
<div class="container">
<form id="calorie-form">
<h2 class="center">Calorie Counter</h2>
<div class="grid">
<legend>Sex</legend>
<div>
<input type="radio" name="sex" id="female" value="F" checked />
<label for="female">
Female (2,000 calories)
</label>
<div>
<input type="radio" name="sex" id="male" value="M" />
<label for="male">
Male (2,500 calories)
</label>
</div>
</div>
</div>
<div class="grid" id="entries">
Breakfast
<input
type="number"
min="0"
class="cal-control"
id="breakfast"
/><br />
Lunch
<input type="number" min="0" class="cal-control" id="lunch" /><br />
Dinner <input type="number" min="0" class="cal-control" id="dinner" />
</div>
<button type="button" class="btn-add" id="add">
Add Entry
</button>
<button type="submit" class="btn-solid" id="calculate">
Calculate
</button>
<button type="button" class="btn-outline" id="clear">
Clear
</button>
</form>
<div id="output"></div>
</div>
</body>
</html>
After Test
</body>
</html>
Solution
<script>
document.getElementById('calorie-form').onsubmit = calculate;
function calculate(e) {
e.preventDefault();
const total = Array.from(document.getElementsByClassName('cal-control'))
.map(meal => Number(meal.value))
.reduce((accumulator, currentValue) => accumulator + currentValue, 0);
const maxCalories = document.getElementById('female').checked ? 2000 : 2500;
const difference = total - maxCalories;
const surplusOrDeficit = difference > 0 ? 'Surplus' : 'Deficit';
const output = document.getElementById('output');
const result = document.createElement('h3');
result.className = 'green-text';
const resultText = document.createTextNode(
`${Math.abs(difference)} Calorie ${surplusOrDeficit}`
);
result.appendChild(resultText);
output.appendChild(result);
const line = document.createElement('hr');
output.appendChild(line);
const recommended = document.createElement('h4');
const recommendedText = document.createTextNode(
`${maxCalories} Recommended Calories`
);
recommended.appendChild(recommendedText);
output.appendChild(recommended);
const consumed = document.createElement('h4');
consumed.innerHTML = `${total} Consumed Calories`;
output.appendChild(consumed);
output.setAttribute('class', 'bordered-class');
output.style.backgroundColor = '#FFF9C4';
}
document.getElementById('add').onclick = function() {
const foodInput = document.createElement('input');
foodInput.placeholder = 'food name';
foodInput.classList.add('food-control');
document.getElementById('entries').appendChild(foodInput);
const calorieInput = document.createElement('input');
calorieInput.setAttribute('type', 'number');
calorieInput.setAttribute('min', '0');
calorieInput.classList.add('cal-control');
calorieInput.classList.add('extra-cal-control');
};
</script>