freeCodeCamp/part-004.md at a71150074dc046fa93e75e807202ca21191e6905

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

2.8 KiB

Raw Blame History

id, title, challengeType

id	title	challengeType
5d5a903507f328a948d398d0	Part 4	0

Description

We've been declaring variables with the var keyword. However, in modern JavaScript, it's better to use let instead of var because it fixes a number of unusual behaviors with var that make it difficult to reason about.

Change every var to let.

Instructions

Tests

tests:
  - text: See description above for instructions.
    testString: assert(/let\s+xp\s*\=\s*0\;?/.test(code) && /let\s+health\s*\=\s*100\;?/.test(code) && /let\s+gold\s*\=\s*50\;?/.test(code) && /let\s+currentWeapon\s*\=\s*0\;?/.test(code));

Challenge Seed

<script>
var xp = 0;
var health = 100;
var gold = 50;
var currentWeapon = 0;

</script>

Before Test

<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>RPG - Dragon Repeller</title>
  <style>
    body {
      background-color: darkblue;
    }
    #text {
      background-color: black;
      color: white;
      padding: 10px;
    }
    #game {
      max-width: 500px;
      max-height: 400px;
      background-color: lightgray;
      color: white;
      margin: 0 auto;
      padding: 10px;
    }
    #controls {
      border: 1px black solid;
      padding: 5px;
    }
    #stats {
      border: 1px black solid;
      color: black;
      padding: 5px;
    }
    #monsterStats {
      display: none;
      border: 1px black solid;
      color: white;
      padding: 5px;
      background-color: red;
    }
    .stat {
      padding-right: 10px;
    }
  </style>
</head>
<body>
<div id="game">
  <div id="stats">
    <span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
    <span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
    <span class="stat">Gold: <strong><span id="goldText">50</span></strong></span>
  </div>
  <div id="controls">
    <button id="button1">Go to store</button>
    <button id="button2">Go to cave</button>
    <button id="button3">Fight dragon</button>
  </div>
  <div id="monsterStats">
    <span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
    <span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
  </div>
  <div id="text">Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.</div>
</div>

After Test

</body>
</html>

Solution

<script>
let xp = 0;
let health = 100;
let gold = 50;
let currentWeapon = 0;
</script>

2.8 KiB Raw Blame History