Javascript 我想知道我是否可以用函数中的字母交换 className

Question

我想改变这个:

function KeyChange2() { 
    var uI3 = dS229.value; 
    mK1.className = uI3; 
    mK2.className = uI3; 
    mK3.className= uI3; 
}

像这样:

function KeyChange2() { 
    var uI3 = dS229.value; 
    var x = className; 
    mK1.x = uI3; 
    mK2.x = uI3; 
    mK3.x = uI3; 
}

dS229.value代表一个输入

Answer 1

您可以使用括号表示法而不是点表示法来访问属性:

function KeyChange2() { 
    var uI3 = dS229.value; 
    var x = 'className'; 
    mK1[x] = uI3; 
    mK2[x] = uI3; 
    mK3[x] = uI3; 
}

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Property_Accessors