javascript - js formatted data

Question

For example:
10 is formatted as 10.00
1.1 is formatted as 1.10
2.21 is formatted as 2.21

No other circumstances

There is BigDecimal in java that can be used. Is there anything similar in js?

Answer 1

.toFixed(2)

Answer 2

printf module

const printf = require('printf')
printf('%.2f', 10) //10.00

toFixed method

(10).toFixed(2) //10.00

Answer 3

Use toFixed (number of decimal places)

var a=1;
a.toFixed(2) //"1.00"
typeof a // "number"