jQuery Replace dot to comma and round it

Try this:

var price1 = 1.99234;

// Format number to 2 decimal places
var num1 = price1.toFixed(2);

// Replace dot with a comma
var num2 = num1.toString().replace(/\./g, ',');

A solution to round and replace with a class selector. This code formats 10.0 to 10,00

$('.formatInteger').each(function(){
  let int = parseFloat($(this).text()).toFixed(2)
  $(this).html(int.toString().replace(".", ","))
})

You can use ".toFixed(x)" function to round your prices:

price1 = price1.toFixed(2)

And then you can use method ".toString()" to convert your value to string:

price1 = price1.toString()

Also, you can use method ".replace("..","..")" to replace "." for ",":

price1 = price1.replace(".", ",")

Result:

price1 = price1.toFixed(2).toString().replace(".", ",")

Updated answer

.toFixed already returns a string, so doing .toString() is not needed. This is more than enough:

price1 = price1.toFixed(2).replace(".", ",");