toString()[0]
x = `A`
//"A"
x.toString()[0]
//"A"
x.toString()[1];
//undefined
typeof x.toString()
// "string"
x.toString();
// "A"
x = `AB`
//"AB"
x.toString()[1];
//"B"
©xgqfrms 2012-2020
www.cnblogs.com 发布文章使用:只允许注册用户才可以访问!
x = `A`
//"A"
x.toString()[0]
//"A"
x.toString()[1];
//undefined
typeof x.toString()
// "string"
x.toString();
// "A"
x = `AB`
//"AB"
x.toString()[1];
//"B"
©xgqfrms 2012-2020
www.cnblogs.com 发布文章使用:只允许注册用户才可以访问!