为什么 parseFloat.replace 不是 function？

Question

If I write

console.log(parseFloat(123.123).replace(/,./g, ''))

It return

Uncaught TypeError: parseFloat(...).replace is not a function

But if I write

console.log(parseFloat(123.123).toFixed(0).replace(/,./g, ''))

It works. So why parseFloat need toFixed to use replace()? Thanks

Answer 1

toFixed(0) convert a Number to String type. Number prototype don't have replace method when String jas