javascript - Javascript - 将 .onkeypress 输入推送到数组
问题描述
我正在学习 Javascript 并尝试构建一个字母猜谜游戏。我一直试图让玩家猜测的字母(varguessUsed)在我的 HTML 中显示为一个数组。我得到的猜测会显示在控制台中,但不会出现在var guessUsed中。我想我的错误在这里:
document.onkeypress = function (event) {
var playerGuess = event.key;
guessUsed.push(playerGuess);
console.log("player guess: " + playerGuess);
// Create array of alphabet //
var letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'];
// Wins, Losses, Guesses left, Guesses so far //
var wins = 0;
var losses = 0;
var guessLeft = 10;
var guessUsed = [];
// Show initial scoreboard //
document.getElementById('wins').innerHTML = wins;
document.getElementById('losses').innerHTML = losses;
document.getElementById('guessLeft').innerHTML = guessLeft;
// Computer guesses a random letter //
var appGuess = letters[Math.floor(Math.random() * letters.length)];
console.log("app guess: " + appGuess)
// Event occurs when player presses a key //
document.onkeypress = function (event) {
var playerGuess = event.key;
// I'm doing something wrong here... onkeypress is not pushing to guessUsed //
guessUsed.push(playerGuess);
console.log("player guess: " + playerGuess);
// If player wins, add a point, reset guessLeft, and change appGuess //
if (playerGuess === appGuess) {
wins++;
guessLeft = 10;
guessUsed = [];
appGuess = letters[Math.floor(Math.random() * letters.length)];
console.log("new app guess: " + appGuess)
// If player guesses wrong, reduce guessLeft and add guess to guessUsed //
} else {
guessLeft--;
}
// If player runs out of guesses, add a loss, reset guessLeft, reset guessUsed, and change appGuess //
if (guessLeft === 0) {
losses++;
guessLeft = 10;
guessUsed = [];
appGuess = letters[Math.floor(Math.random() * letters.length)];
console.log("new app guess: " + appGuess)
}
// Update scoreboard at the end of function //
document.getElementById('wins').innerHTML = wins;
document.getElementById('losses').innerHTML = losses;
document.getElementById('guessLeft').innerHTML = guessLeft;
document.getElementById('guessUsed').html = guessUsed;
}
<h1>Guess what letter I'm thinking of...</h1>
Wins: <span id="wins"></span><br>
Losses: <span id="losses"></span><br>
Guesses Left: <span id="guessLeft"></span><br>
Your Guesses So Far: <span id="guessUsed"></span>
解决方案
问题在这里:
document.getElementById('wins').innerHTML = wins;
document.getElementById('losses').innerHTML = losses;
document.getElementById('guessLeft').innerHTML = guessLeft;
document.getElementById('guessUsed').html = guessUsed;
// ^^^^
您正在分配guessUsed
给.html
,这不是一回事。这隐含地创建了一个html
属性,但它没有链接到任何东西。
您需要在此处分配给.innerHTML
(或更好.textContent
)。
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