toLocaleString return unexcepted characher in IE

Question

I expected toLocaleString to return "Monday" (6 character),

but IE returned some unexpected character to me,

how can i get weekday correctly without another extension API (moment.js, etc..)

IE11:

var weekday = new Date('2015-11-23').toLocaleString("en-us", { weekday: 'long'});

weekday.toString() //"Monday"
weekday.length //7
weekday.charCodeAt(0) //8206 <-- what is this

Chrome53:

var weekday = new Date('2015-11-23').toLocaleString("en-us", { weekday: 'long'});

weekday.toString() //"Monday"
weekday.length //6
weekday.charCodeAt(0) //77

Why would you care? You're only using it for displaying dates, right? — Bergi, Sep 19 '16 at 18:07
Because i need to sort them, like ('Monday', 'Tuesday' ...) or ('Sunday', 'Monday' ...) — Benny Leung, Sep 20 '16 at 02:25

score 0 · Accepted Answer · answered Sep 19 '16 at 18:04

OK, I did some investigating:

Character 8206 is a Left-to-right mark, most likely added in by MS as part of its internationalization rules.

It can be easily stripped out.

var stripped = weekday.replace(/\u200E/g, "");
console.log(stripped.length)

Just a note: You may also encounter character 8207, which is a right-to-left mark -- that can be stripped just as easily.

toLocaleString return unexcepted characher in IE

1 Answers1