WTFJS with Math (or why 0.1 + 0.2 results in 0.30000000000000004)

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A few fun little Math-related wtfjs examples. A classic one is adding an empty Array and an empty Object:

[] + {}     // '[object Object]'
{} + []     // 0

If you’re looking for a hint: Coercion.

JS WTF with Math →
0.30000000000000004.com →

Published by Bramus!

Bramus is a frontend web developer from Belgium, working as a Chrome Developer Relations Engineer at Google. From the moment he discovered view-source at the age of 14 (way back in 1997), he fell in love with the web and has been tinkering with it ever since (more …)

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