freeCodeCamp/part-004.md at 80438cac3eef13eb3f3f5ea11faaa9b92d72e2d7

Randell Dawson b9c9a95223 chore(learn): Renamed all project-based curriculum project step filenames to use 3-digit format of part-ddd.md (#39463 )

* fix: renamed basic html cat photo app steps

* fix: renamed css-variables project steps

* fix: renamed d3-dashboard filenames

* fix: renamed rpg-game filenames

* fix: renamed functional-progamming-spreadsheet filenames

* fix: renamed calorie-counter project filenames

2020-09-16 11:54:12 +05:30

2.9 KiB

Raw Blame History

id, title, challengeType, isHidden

id	title	challengeType	isHidden
5d5a903507f328a948d398d0	Part 4	0	true

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>

2.9 KiB Raw Blame History