无法在 keyDown 或 keyPress 事件处理程序中调用函数
Can't call function within keyDown or keyPress event handlers
无法在 keyDown 或 keyPress 事件处理程序中调用函数。
var buttonColors = ["red", "blue", "green", "yellow"];
var gamePattern = [];
$(document).on("keydown", nextSequence);
function nextSequence() {
var randomNum = Math.floor(Math.random() * 4);
var randomChosenColor = buttonColors[randomNum];
return gamePattern.push(randomChosenColor);
}
您可能不需要 return,因为您的变量在回调之外。正如@Samathingamajig 指出的那样,它确实有效。您还可以调用 keydown
shorthand 版本
$(document).keydown(function () {
var randomNum = Math.floor(Math.random() * 4);
var randomChosenColor = buttonColors[randomNum];
gamePattern.push(randomChosenColor);
// Check the current state of gamePattern
console.log(gamePattern);
});
无法在 keyDown 或 keyPress 事件处理程序中调用函数。
var buttonColors = ["red", "blue", "green", "yellow"];
var gamePattern = [];
$(document).on("keydown", nextSequence);
function nextSequence() {
var randomNum = Math.floor(Math.random() * 4);
var randomChosenColor = buttonColors[randomNum];
return gamePattern.push(randomChosenColor);
}
您可能不需要 return,因为您的变量在回调之外。正如@Samathingamajig 指出的那样,它确实有效。您还可以调用 keydown
shorthand 版本
$(document).keydown(function () {
var randomNum = Math.floor(Math.random() * 4);
var randomChosenColor = buttonColors[randomNum];
gamePattern.push(randomChosenColor);
// Check the current state of gamePattern
console.log(gamePattern);
});