With a browser, how do I know which decimal separator does the operating system use?

Question

I\'m developing a web application.

I need to display some decimal data correctly so that it can be copied and pasted into a certain GUI application that

Answer 1

Similar to other answers, but compressed as a constant:

const decimal=.1.toLocaleString().substr(1,1);      //returns "." in Canada

Also, to get the thousands separator:

const thousands=1234..toLocaleString().substr(1,1);   //returns "," in Canada

Just place the code at the top of your JS and then call as required to return the symbol.

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For example (where I live), to remove commas from "1,234,567":

console.log( "1,234,567".replaceAll(thousands,"") ); //prints "1234567" to console.