javascript - toPrecision() doesn't give accurate length

Question

I am trying to use ToPrecision in something and sometimes it works and in some scenarios it doesn't. I am confused

console.log(0.0999099909990999.toPrecision(11));
console.log(0.9999999999999999.toPrecision(11));

results:

0.099909990999
1.0000000000

Answer 1

等待大神答复