JavaScript语句 [英] JavaScript if Statements

问题描述

以下代码中的哪个错误会导致if（is1Pressed = true）控制台在控制台中反复记录1

What error in the following code would result in if(is1Pressed = true) console logging "1" repeatedly in console

 if(is1Pressed = true){
    console.log("1");
    p.innerHTML = "<audio autoplay='autoplay' src='button1.wav'/>";
  }
  else if(is2Pressed = true) {
        console.log=("2");
    p.innerHTML = "<audio autoplay='autoplay' src='button1.wav'/>";
  }
else if(is3Pressed = true) {
 p.innerHTML = "<audio autoplay='autoplay' src='button1.wav'/>";
}
else if(is4Pressed = true) {
 p.innerHTML = "<audio autoplay='autoplay' src='button1.wav'/>";
}
else if(is5Pressed = true) {
 p.innerHTML = "<audio autoplay='autoplay' src='button1.wav'/>";
}
else 
{
  p.innerHTML = "<audio autoplay='autoplay' src='button1.wav'/>";
}

推荐答案

您正在使用 = ，赋值运算符，而不是 == 或 === 。也就是说，您可以针对 true 显式停止检查，只需检查变量的真实性以获得更简洁的代码：

You are using =, the assignment operator, instead of == or ===. That said, you can stop checking explicitly against true and just check the variable's truthiness for more concise code:

if (is1Pressed) {
    console.log("1");
    p.innerHTML = "<audio autoplay='autoplay' src='button1.wav'/>";
}
else if (is2Pressed) {
    console.log = ("2");
    p.innerHTML = "<audio autoplay='autoplay' src='button1.wav'/>";
}
else if (is3Pressed) {
    p.innerHTML = "<audio autoplay='autoplay' src='button1.wav'/>";
}
else if (is4Pressed) {
    p.innerHTML = "<audio autoplay='autoplay' src='button1.wav'/>";
}
else if (is5Pressed) {
    p.innerHTML = "<audio autoplay='autoplay' src='button1.wav'/>";
}
else {
    p.innerHTML = "<audio autoplay='autoplay' src='button1.wav'/>";
}

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