freeCodeCamp/part-072.md at df44da9dc20488fc5c908bd770087e8380216dd5

chore(learn): Remove remaining isHidden keys from frontmatter (English and Chinese challenges) (#39809 )

* fix: remove isHidden key from tool template

* fix: removed isHidden key from English challenges

* fix: remove isHidden key from Chinese challenges

2020-10-08 14:18:47 +02:00

7.4 KiB

Raw Blame History

id, title, challengeType

id	title	challengeType
5ddb965c65d27e1512d44ddf	Part 72	0

Description

We need to provide a callback function in the parentheses of forEach().

This function will take each input item, in our case we'll call it input, as an argument. Then inside the function body, we need to call the remove() method.

In between the parentheses of the .forEach() function, enter input => input.remove().

Instructions

Tests

tests:
  - text: See description above for instructions.
    testString: assert( code.replace(/\s/g, '').match(/foodInputs.forEach\(input=>input.remove\(\)\)/) )

Challenge Seed

<script>
  document.getElementById('calorie-form').onsubmit = calculate;

  function calculate(e) {
    e.preventDefault();
    clearOutput();

    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');
    document.getElementById('entries').appendChild(calorieInput);
  };

  document.getElementById('clear').onclick = function() {
    clearOutput();
    clearForm();
  };

  const clearOutput = () => {
    document.getElementById('output').innerHTML = '';
    document.getElementById('output').classList.remove('bordered-class');
  };

  const clearForm = () => {
    const foodInputs = Array.from(
      document.getElementsByClassName('food-control')
    );

    foodInputs.forEach();
  };
</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();
    clearOutput();

    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');
    document.getElementById('entries').appendChild(calorieInput);
  };

  document.getElementById('clear').onclick = function() {
    clearOutput();
    clearForm();
  };

  const clearOutput = () => {
    document.getElementById('output').innerHTML = '';
    document.getElementById('output').classList.remove('bordered-class');
  };

  const clearForm = () => {
    const foodInputs = Array.from(
      document.getElementsByClassName('food-control')
    );

    foodInputs.forEach(input => input.remove());
  };
</script>

7.4 KiB Raw Blame History