Question: Does the browser convert a default numeric value to a local format for display?

Type language subtags into this input field and click the button until you find one that changes the output in the field below.
Lang tag:

Answer is yes if the browser shows something other than 1,234.56 or 1234.56.

Question: Does the browser accept a locally-formatted value for the @value attribute of the input field and display it?

Enter the lang value

Enter the numeric value of field (in local format)

Answer is yes if the above form field displays something sensible.

Question: Does the browser convert a default numeric value to a local format for display as you are typing?

Enter the lang value

Type in 1234.56.

Answer is yes if the field above displays something other than 1,234.56 or 1234.56.

Question: Does the browser convert a default numeric value to a local format for display when the locale is changed using javascript?

Enter the lang value

Answer is yes if the field above displays something other than 1,234.56 or 1234.56.

Question: Does the browser convert a locally formatted numeric value to canonical format internally if you query the value of the field using javascript?

Enter the lang value

Type in the local format of the number and click the button.

Answer is yes if this number >>> <<< shows 1234.56.