How to get 2 decimal places in JS and divide the data into thousands of bits

JS in the tofixed (n) method to round the number to the number of the specified number of decimal digits, Note: This method can only be used for data type numbers, including Float,int. For example:

123.12345.toFixed (2);  "123.12" divide the data by using a single statement like this:. Replace (/\d{1,3} (? = (\d{3}) + (\.\d*)? $)/g, ' $&, '). Note: thereplace () method can only work on string types , and our team data is usually divided by the number of decimal divisions, so the data must be converted to a string type before the data is divided into thousands of bits. or use the 123456.1234.toFixed (2) + "" method to convert the data to a string type. For example:123456.1234.toFixed (2). toString (). Replace (/\d{1,3} (? = (\d{3}) + (\.\d*)? $)/g, ' $&, '); "123,456.12"(123456.1234.toFixed (2) + ""). Replace (/\d{1,3} (? = (\d{3}) + (\.\d*)? $)/g, ' $&, '); "123,456.12"Although these 2 methods are very simple, but in the data processing use more, so it is more practical.

How to get 2 decimal places in JS and divide the data into thousands of bits