解决js相同的正则多次调用test()返回的值却不同的问题

var reg = /^1[345678][0-9]{9}$/g;
console.log(reg.test(15328044636));
console.log(reg.test(15328044636));

true
false

var reg = /^1[345678][0-9]{9}$/g;
console.log(reg.lastIndex, reg.test(15328044636));
console.log(reg.lastIndex, reg.test(15328044636));

//打印的值
0 true
11 false

var reg = /^1[345678][0-9]{9}$/g;
console.log(reg.lastIndex, reg.test(15328044636));
reg.lastIndex = 0;
console.log(reg.lastIndex, reg.test(15328044636));

//打印的值
0 true
0 true