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我正在爲一個機械網站製作一個JavaScript閃存卡遊戲。因爲我想在卡片上添加方程式,所以我需要使用增量(Δ)符號。三角洲標誌破解JavaScript代碼
一張卡片可能有:「一方的功率方程」和另一方的「P = W /Δt」。如果卡從第一面開始,當按下空格鍵或按下翻蓋按鈕時,它將翻轉。但是,如果它從第二面開始,即帶有Δ符號的那一面,當按下「翻轉」按鈕或空格鍵時,它不會翻轉。
我曾嘗試寫作Δ不同的方式:
Δ Δ Δ
沒有這些工作的。 我的代碼是:
//Copyright Attribution-ShareAlike 4.0 International 2017 Hazel Meehan
//array containing all options
var options = [ //counts from 0
"Joules(J)", "Measure of Work",
"Watts(W)", "Measure of Power",
"Ek", "Kinetic Energy",
"Ep", "Potential Energy",
"Newtons(N)", "Measure of Force",
"Pascals(Pa)", "Pressure",
"ms-1", "Metres per Second",
"ms-2", "Metres per Second Gained",
"10N", "Value of Gravity",
"Weight is a", "Force beginning with W",
"The capacity to do work", "Energy is",
"d = ΔvΔt is the equation for", "The equation for distance",
"W=FΔd is the equation for", "The equation for work",
"P=W/Δt is the equation for", "The equation for power"
];
//initialize variables
var randomNum = 0;
var sideOne = " ";
var sideTwo = " ";
//choose new card using random number
var newCard = function() { //runs on 'next'
var randomNum = Math.floor(Math.random() * options.length);
sideOne = options[randomNum];
if (randomNum % 2 == 0) { //is the number even
sideTwo = options[randomNum + 1];
} else {
sideTwo = options[randomNum - 1];
}
document.getElementById("card").innerHTML = sideOne;
};
//show other side of card
var flip = function() { //runs on 'flip'
if (document.getElementById("card").innerHTML == sideOne) {
document.getElementById("card").innerHTML = sideTwo;
} else {
document.getElementById("card").innerHTML = sideOne;
}
};
//change card on key down
document.onkeydown = function(e) {
e = e || window.event;
if (e.keyCode == '39') { //right arow key
newCard();
} else if (e.keyCode == '32') { //space bar
flip();
}
}
<article>
<h2>Flashcards</h2>
<center><button id="flashButton" onclick="newCard()">Next</button></center>
<br>
<center><button id="card"></button></center>
<br>
<center><button id="flashButton" onclick="flip()">Flip</button></center>
</article>
它在[SO](https://stackoverflow.com)上工作,你應該爲你的html添加一個''標籤以便看到它們。 –
適合我。你使用的是什麼瀏覽器?任何記錄在控制檯? – marekful
我可以重現這個錯誤,當我用'Δ'替換'Δ'時,它會消失。 – ASDFGerte