if判断“或”该怎么写？

Question

请问if里的a=='ok'或a=='no'
除了这么写if(a=='ok'||a=='no')
还有没有更简单的缩写方式？

Answer 1

const exp = ['ok','no'];
if(exp.includes(a)){
    // TODO
}

Array.prototype.includes() - JavaScript | MDN

Answer 2

var condition=a || b || c;
if(condition)
{

}

Answer 3

a == 'ok' || a == 'no' ? a = 'good' : a = 'bad'

Answer 4

1楼正解，平时项目也是这样写