What is the difference between Number(…) and parseFloat(…)

Question

What is the difference between parseInt(string) and Number(string) in JavaScript has been asked previously.

But the answers basically focused on the radix

Answer 1

The internal workings are not that different, as @James Allardic already answered. There is a difference though. Using parseFloat, a (trimmed) string starting with one or more numeric characters followed by alphanumeric characters can convert to a Number, with Number that will not succeed. As in:

parseFloat('3.23abc'); //=> 3.23
Number('3.23abc'); //=> NaN

In both conversions, the input string is trimmed, by the way:

parseFloat('  3.23abc '); //=> 3.23
Number('   3.23 '); //=> 3.23