自动类型转换(了解)
1. 自动类型转换: 根据上下文语义转换
代码
var value1 = "2";
var value2 = "1";
//减法的语意: 将会按照数字进行运算
var value3 = value1 - value2;//Number()
console.log(value3,typeof value3);//1 "number"
//减法: 将会按照数字进行运算
var value4 = true;
var value5 = value1 - value4;//Number()
console.log(value5,typeof value5);//1 "number"