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231 lines
5.8 KiB
Markdown
231 lines
5.8 KiB
Markdown
---
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id: 62a8d1c72e8bb13c2074d93c
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title: Step 98
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challengeType: 0
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dashedName: step-98
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---
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# --description--
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When you were testing your function, you should have seen an error message in the console. This error is due to the condition in the `buyWeapon` function.
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The `currentWeaponIndex` variable is the index of the `weapons` array, but array indexing starts at zero. The index of the last element in an array is one less than the length of the array.
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Change the `if` condition to check `weapons.length - 1`, instead of `weapons.length`.
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Test out your `buyWeapon` function again to see the error message disappear.
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# --hints--
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You should update the condition to subtract `1` from `weapons.length`.
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```js
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assert.match(buyWeapon.toString(), /weapons\.length\s*-\s*1/);
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```
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Your condition should check if `currentWeaponIndex` is less than `weapons.length - 1`.
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```js
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assert.match(buyWeapon.toString(), /currentWeaponIndex\s*<\s*weapons\.length\s*-\s*1/);
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```
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# --seed--
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## --seed-contents--
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```html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<link rel="stylesheet" href="./styles.css">
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<title>RPG - Dragon Repeller</title>
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</head>
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<body>
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<div id="game">
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<div id="stats">
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<span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
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<span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
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<span class="stat">Gold: <strong><span id="goldText">250</span></strong></span>
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</div>
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<div id="controls">
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<button id="button1">Go to store</button>
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<button id="button2">Go to cave</button>
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<button id="button3">Fight dragon</button>
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</div>
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<div id="monsterStats">
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<span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
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<span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
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</div>
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<div id="text">
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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.
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</div>
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</div>
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<script src="./script.js"></script>
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</body>
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</html>
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```
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```css
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body {
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background-color: #0a0a23;
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}
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#text {
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background-color: #0a0a23;
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color: #ffffff;
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padding: 10px;
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}
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#game {
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max-width: 500px;
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max-height: 400px;
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background-color: #ffffff;
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color: #ffffff;
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margin: 30px auto 0px;
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padding: 10px;
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}
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#controls,
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#stats {
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border: 1px solid #0a0a23;
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padding: 5px;
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color: #0a0a23;
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}
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#monsterStats {
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display: none;
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border: 1px solid #0a0a23;
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padding: 5px;
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color: #ffffff;
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background-color: #c70d0d;
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}
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.stat {
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padding-right: 10px;
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}
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button {
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cursor: pointer;
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color: #0a0a23;
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background-color: #feac32;
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background-image: linear-gradient(#fecc4c, #ffac33);
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border: 3px solid #feac32;
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}
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```
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```js
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let xp = 0;
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let health = 100;
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let gold = 250;
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let currentWeaponIndex = 0;
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let fighting;
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let monsterHealth;
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let inventory = ["stick"];
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const button1 = document.querySelector('#button1');
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const button2 = document.querySelector("#button2");
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const button3 = document.querySelector("#button3");
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const text = document.querySelector("#text");
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const xpText = document.querySelector("#xpText");
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const healthText = document.querySelector("#healthText");
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const goldText = document.querySelector("#goldText");
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const monsterStats = document.querySelector("#monsterStats");
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const monsterName = document.querySelector("#monsterName");
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const monsterHealthText = document.querySelector("#monsterHealth");
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const weapons = [
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{ name: 'stick', power: 5 },
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{ name: 'dagger', power: 30 },
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{ name: 'claw hammer', power: 50 },
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{ name: 'sword', power: 100 }
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];
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const locations = [
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{
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name: "town square",
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"button text": ["Go to store", "Go to cave", "Fight dragon"],
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"button functions": [goStore, goCave, fightDragon],
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text: "You are in the town square. You see a sign that says \"Store\"."
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},
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{
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name: "store",
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"button text": ["Buy 10 health (10 gold)", "Buy weapon (30 gold)", "Go to town square"],
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"button functions": [buyHealth, buyWeapon, goTown],
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text: "You enter the store."
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},
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{
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name: "cave",
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"button text": ["Fight slime", "Fight fanged beast", "Go to town square"],
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"button functions": [fightSlime, fightBeast, goTown],
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text: "You enter the cave. You see some monsters."
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}
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];
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// initialize buttons
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button1.onclick = goStore;
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button2.onclick = goCave;
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button3.onclick = fightDragon;
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function update(location) {
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button1.innerText = location["button text"][0];
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button2.innerText = location["button text"][1];
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button3.innerText = location["button text"][2];
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button1.onclick = location["button functions"][0];
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button2.onclick = location["button functions"][1];
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button3.onclick = location["button functions"][2];
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text.innerText = location.text;
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}
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function goTown() {
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update(locations[0]);
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}
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function goStore() {
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update(locations[1]);
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}
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function goCave() {
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update(locations[2]);
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}
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function fightDragon() {
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console.log("Fighting dragon.");
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}
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function buyHealth() {
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if (gold >= 10) {
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gold -= 10;
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health += 10;
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goldText.innerText = gold;
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healthText.innerText = health;
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} else {
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text.innerText = "You do not have enough gold to buy health.";
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}
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}
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--fcc-editable-region--
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function buyWeapon() {
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if (currentWeaponIndex < weapons.length) {
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if (gold >= 30) {
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gold -= 30;
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currentWeaponIndex++;
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goldText.innerText = gold;
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let newWeapon = weapons[currentWeaponIndex].name;
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text.innerText = "You now have a " + newWeapon + ".";
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inventory.push(newWeapon);
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text.innerText += " In your inventory you have: " + inventory;
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} else {
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text.innerText = "You do not have enough gold to buy a weapon.";
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}
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}
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}
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--fcc-editable-region--
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function fightSlime() {
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}
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function fightBeast() {
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}
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```
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