js数据类型转换成布尔类型

    //布尔类型转换

    var a = Boolean(‘0‘);//打印true 因为字符串有数据所以是true
    var b = Boolean(0);//打印false
    var c = Boolean(‘1‘);//打印true
    var d = Boolean(1);//打印true
    var e = Boolean(null);//打印false
    var f = Boolean(undefined);//打印false
    var g = Boolean(‘abcd‘);//打印true
    var h = Boolean(‘‘);//打印false

    console.log(a,b,c,d,e,f,g,h);