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script.js
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script.js
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/**
* Get pokemon data from API
* @param {Number} id
* @returns
*/
async function getPokemon(id) {
const response = await fetch(`https://pokeapi.co/api/v2/pokemon/${id}`);
const data = await response.json();
return data;
}
/**
* init 50 Pokemon Selection
*/
async function initPokemonSelect() {
const pokemonSelect = document.getElementById("pokemon");
for (let i = 1; i <= 50; i++) {
const pokemon = await getPokemon(i);
// console.log(pokemon);
const option = document.createElement("option");
option.value = pokemon.id;
option.text = pokemon.name;
pokemonSelect.appendChild(option);
}
}
/**
* User select Pokemon
*/
async function selectUserPokemon() {
const selectedPokemonId = document.getElementById("pokemon").value;
const userPokemon = await getPokemon(selectedPokemonId);
displayPokemonCard(userPokemon, "user-pokemon-container", "Your Pokemon");
checkBattleReady();
}
/**
* random select enemy pokemon
*/
async function selectEnemyPokemon() {
const randomPokemonId = Math.floor(Math.random() * 151) + 1; // 随机选择一个宝可梦
const enemyPokemon = await getPokemon(randomPokemonId);
displayPokemonCard(enemyPokemon, "enemy-pokemon-container", "Enemy Pokemon");
checkBattleReady(randomPokemonId);
}
// display pokemon Card and health-bar
function displayPokemonCard(pokemon, containerId, title) {
const container = document.getElementById(containerId);
container.innerHTML = ""; // clean previous data
const cardDiv = document.createElement("div");
cardDiv.className = "pokemon-card";
cardDiv.innerHTML = `
<h3>${title}</h3>
<img src="${pokemon.sprites.front_default}" alt="${pokemon.name}">
<p>${pokemon.name}</p>
<div class="health-bar">
<div class="health-bar-inner" style="width: 100%"></div>
</div>
`;
container.appendChild(cardDiv);
}
/**
* calculate the battle result
* @param {Object} pokemon1
* @param {Object} pokemon2
*/
function calculateBattle(pokemon1, pokemon2) {
const hp1Max = pokemon1.stats.find(
(stat) => stat.stat.name === "hp"
).base_stat;
const hp2Max = pokemon2.stats.find(
(stat) => stat.stat.name === "hp"
).base_stat;
const attack1 = pokemon1.stats.find(
(stat) => stat.stat.name === "attack"
).base_stat;
const attack2 = pokemon2.stats.find(
(stat) => stat.stat.name === "attack"
).base_stat;
// first round
const hp2 = hp2Max - attack1;
// updateHealthBar("user-pokemon-container", hp1);
updateHealthBar("enemy-pokemon-container", hp2, hp2Max);
// battle shaking effect
const userCard = document.getElementById("user-pokemon-container").firstChild;
const enemyCard = document.getElementById(
"enemy-pokemon-container"
).firstChild;
enemyCard.classList.add("shake");
userCard.classList.add("shake");
setTimeout(() => enemyCard.classList.remove("shake"), 1000);
setTimeout(() => userCard.classList.remove("shake"), 1000);
// after 1.5sec remove shaking effect
setTimeout(() => {
userCard.classList.add("shake");
enemyCard.classList.add("shake");
setTimeout(() => userCard.classList.remove("shake"), 1000);
setTimeout(() => enemyCard.classList.remove("shake"), 1000);
// Second round
const hp1 = hp1Max - attack2;
// update the final health bar
// updateHealthBar("enemy-pokemon-container", hp2);
updateHealthBar("user-pokemon-container", hp1, hp1Max);
console.log(`hp1: ${hp1} hp2: ${hp2}`);
// check win or loss
if (hp1 > hp2) {
// user wins
document
.getElementById("enemy-pokemon-container")
.querySelector(".health-bar-inner").style.width = "0%";
endBattle(
"user-pokemon-container",
"enemy-pokemon-container",
pokemon1,
pokemon2
);
} else if (hp1 < hp2) {
// enemy wins
document
.getElementById("user-pokemon-container")
.querySelector(".health-bar-inner").style.width = "0%";
endBattle(
"enemy-pokemon-container",
"user-pokemon-container",
pokemon2,
pokemon1
);
} else {
const resultDiv = document.createElement("h2");
resultDiv.textContent = "It's a tie!";
document.querySelector(".battle-result").appendChild(resultDiv);
}
}, 1500); // after 1.5sec start the second round
}
// Update health bar value
function updateHealthBar(containerId, hp, maxHp) {
const healthBar = document
.getElementById(containerId)
.querySelector(".health-bar-inner");
const validMaxHp = Math.max(0, maxHp);
const validHp = Math.min(Math.max(1, hp), validMaxHp);
const hpPercent = (validHp / validMaxHp) * 100;
healthBar.style.width = `${hpPercent}%`;
}
function restoreHealthBar(containerId) {
const healthBar = document
.getElementById(containerId)
.querySelector(".health-bar-inner");
healthBar.style.width = `100%`;
}
// ending battle
function endBattle(
winnerContainerId,
loserContainerId,
winnerPokemon,
loserPokemon
) {
const resultDiv = document.createElement("h2");
resultDiv.textContent = `${winnerPokemon.name} wins!`;
document.querySelector(".battle-result").appendChild(resultDiv);
// highlight the winner card
document
.getElementById(winnerContainerId)
.firstChild.classList.add("highlight");
document
.getElementById(loserContainerId)
.firstChild.classList.add("grayscale");
// display reset button
function resetBattle() {
const resetButton = document.querySelector(".restart-button");
resetButton.classList.add("restart-button--active");
resetButton.addEventListener("click", () => {
document.querySelector(".battle-result").innerHTML = "";
const userContainerId = "user-pokemon-container";
const enemyContainerId = "enemy-pokemon-container";
const userContainer = document.getElementById(userContainerId);
const enemyContainer = document.getElementById(enemyContainerId);
userContainer.innerHTML = "";
enemyContainer.innerHTML = "";
resetButton.classList.remove("restart-button--active");
const battleButton = document.querySelector(".battle-button");
battleButton.style.display = "none";
});
}
resetBattle();
}
// check battle is ready
function checkBattleReady(enemyPokemonId) {
const userCard = document.getElementById("user-pokemon-container").innerHTML;
const enemyCard = document.getElementById(
"enemy-pokemon-container"
).innerHTML;
const battleButton = document.querySelector(".battle-button");
if (userCard && enemyCard) {
battleButton.style.display = "block";
battleButton.onclick = () => startBattle(enemyPokemonId);
} else {
battleButton.style.display = "none";
}
}
// start battle
async function startBattle(enemyPokemonId) {
// clear previous data
document.querySelector(".battle-result").innerHTML = "";
const selectedPokemonId = document.getElementById("pokemon").value;
const userPokemon = await getPokemon(selectedPokemonId);
const enemyPokemon = await getPokemon(enemyPokemonId);
// first round:user attack
calculateBattle(userPokemon, enemyPokemon);
}
// init pokemon selection
initPokemonSelect();