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[英]Node.js - eventListener - How to log in a file while triggering an event
[英]How to count multiple eventListener in one JS file?
我是JavaScript新手。 目前,我正在用Ruby构建一个简单的游戏“井字游戏”,但不幸的是,它停留在这里。
我有这样的JS文件:
const initialBoard = document.getElementById('navbar-new');
initialBoard.addEventListener("click", (e) => {
e.preventDefault();
alert('Game starts!');
grid_0.innerText = '';
grid_1.innerText = '';
grid_2.innerText = '';
grid_3.innerText = '';
grid_4.innerText = '';
grid_5.innerText = '';
grid_6.innerText = '';
grid_7.innerText = '';
grid_8.innerText = '';
});
const grid_0 = document.getElementById('grid-0');
grid_0.addEventListener("click", (e) => {
e.preventDefault();
grid_0.innerText = "X";
});
const grid_1 = document.getElementById('grid-1');
grid_1.addEventListener("click", (e) => {
e.preventDefault();
grid_1.innerText = "X"
});
const grid_2 = document.getElementById('grid-2');
grid_2.addEventListener("click", (e) => {
e.preventDefault();
grid_2.innerText = 'X';
});
const grid_3 = document.getElementById('grid-3');
grid_3.addEventListener("click", (e) => {
e.preventDefault();
grid_3.innerText = 'X';
});
const grid_4 = document.getElementById('grid-4');
grid_4.addEventListener("click", (e) => {
e.preventDefault();
grid_4.innerText = 'X';
});
const grid_5 = document.getElementById('grid-5');
grid_5.addEventListener("click", (e) => {
e.preventDefault();
grid_5.innerText = 'X';
});
const grid_6 = document.getElementById('grid-6');
grid_6.addEventListener("click", (e) => {
e.preventDefault();
grid_6.innerText = 'X';
});
const grid_7 = document.getElementById('grid-7');
grid_7.addEventListener("click", (e) => {
e.preventDefault();
grid_7.innerText = 'X';
});
const grid_8 = document.getElementById('grid-8');
grid_8.addEventListener("click", (e) => {
e.preventDefault();
grid_8.innerText = 'X';
});
我从假设所有9个网格在事件单击时都显示“ X”开始。 问题是,我不确定如何像在现实世界中的Tic Tac Toe游戏中那样使eventListener显示“ X”,“ O”,“ X”,“ O”顺序。
想知道我有什么方法可以使用它,还是最好重构所有代码? 先感谢您!
您将需要一个flag
来告诉您是打印X
还是O
像这样的东西(还没有测试过):
const initialBoard = document.getElementById('navbar-new');
let isXActive = true;
initialBoard.addEventListener("click", (e) => {
e.preventDefault();
alert('Game starts!');
grid_0.innerText = '';
grid_1.innerText = '';
grid_2.innerText = '';
grid_3.innerText = '';
grid_4.innerText = '';
grid_5.innerText = '';
grid_6.innerText = '';
grid_7.innerText = '';
grid_8.innerText = '';
});
function print() {
return isXActive ? "X" : "O";
}
function toggleXActive() {
isXActive = !isXActive;
}
const grid_0 = document.getElementById('grid-0');
grid_0.addEventListener("click", (e) => {
e.preventDefault();
grid_0.innerText = print();
toggleXActive();
});
const grid_1 = document.getElementById('grid-1');
grid_1.addEventListener("click", (e) => {
e.preventDefault();
grid_1.innerText = print();
toggleXActive();
});
const grid_2 = document.getElementById('grid-2');
grid_2.addEventListener("click", (e) => {
e.preventDefault();
grid_2.innerText = print();
toggleXActive();
});
const grid_3 = document.getElementById('grid-3');
grid_3.addEventListener("click", (e) => {
e.preventDefault();
grid_3.innerText = print();
toggleXActive();
});
const grid_4 = document.getElementById('grid-4');
grid_4.addEventListener("click", (e) => {
e.preventDefault();
grid_4.innerText = print();
toggleXActive();
});
const grid_5 = document.getElementById('grid-5');
grid_5.addEventListener("click", (e) => {
e.preventDefault();
grid_5.innerText = print();
toggleXActive();
});
const grid_6 = document.getElementById('grid-6');
grid_6.addEventListener("click", (e) => {
e.preventDefault();
grid_6.innerText = print();
toggleXActive();
});
const grid_7 = document.getElementById('grid-7');
grid_7.addEventListener("click", (e) => {
e.preventDefault();
grid_7.innerText = print();
toggleXActive();
});
const grid_8 = document.getElementById('grid-8');
grid_8.addEventListener("click", (e) => {
e.preventDefault();
grid_8.innerText = print();
toggleXActive();
});
谢谢@Varinder! :)
只需使用下面的代码进行整理,即可使用:
const initialBoard = document.getElementById('navbar-new');
initialBoard.addEventListener("click", (e) => {
e.preventDefault();
alert('Game starts!');
grid_0.innerText = '';
grid_1.innerText = '';
grid_2.innerText = '';
grid_3.innerText = '';
grid_4.innerText = '';
grid_5.innerText = '';
grid_6.innerText = '';
grid_7.innerText = '';
grid_8.innerText = '';
});
const grid_0 = document.getElementById('grid-0');
const grid_1 = document.getElementById('grid-1');
const grid_2 = document.getElementById('grid-2');
const grid_3 = document.getElementById('grid-3');
const grid_4 = document.getElementById('grid-4');
const grid_5 = document.getElementById('grid-5');
const grid_6 = document.getElementById('grid-6');
const grid_7 = document.getElementById('grid-7');
const grid_8 = document.getElementById('grid-8');
let currentPlayer = "X";
function ticTac(){
if (this.innerText !== "X" || this.innerText !== "O") {
this.innerText = currentPlayer;
currentPlayer = currentPlayer == "X" ? "O" : "X";
}
};
document.getElementById("grid-0").onclick = ticTac;
document.getElementById("grid-1").onclick = ticTac;
document.getElementById("grid-2").onclick = ticTac;
document.getElementById("grid-3").onclick = ticTac;
document.getElementById("grid-4").onclick = ticTac;
document.getElementById("grid-5").onclick = ticTac;
document.getElementById("grid-6").onclick = ticTac;
document.getElementById("grid-7").onclick = ticTac;
document.getElementById("grid-8").onclick = ticTac;
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