vscodewarning.js

// these 3 produce green underbars in Visual Studio Code, but shouldn't.

// complains that [] must be a string. no, it can be an array.
var df_point = new Intl.DateTimeFormat([], {year: "numeric"});
// complains that ["es"] must be a string. no, it can be an array.
var df_point1 = new Intl.DateTimeFormat(["es"], {year: "numeric"});
// complains that 'year: numeric' requires hour12. no, hour12 is  optional.
var df_point2 = new Intl.DateTimeFormat("de", {year: "numeric"});