Searching for the regulations on type-casting in JavaScript

Seeking a definitive set of guidelines regarding automatic typecasting and when it occurs. I am in the process of developing some rules for new developers, an example being:

90 > '100'   // comparison as integers
'90' > 100   // comparison as integers
'90' > '100' // comparison as strings

The best explanation I could come up with is simply "because" :)

Answer №1

It's worth noting that in certain browsers, the comparison '026' < 24 might evaluate to true due to the string being interpreted as an octal number (resulting in 22).

For best practice, it is recommended to always manually cast types. This can be done by using a = ''+a to convert to a string, or a = parseInt(a,10); to convert to an integer.

This explanation should focus on manual typecasting rather than relying on automatic conversions.

Answer №2

If you truly want to grasp the current situation, it is highly recommended that you refer to the specifications:

An important point regarding the guidelines provided in that section:

Type(x) is simply a shorthand for "the type of x"

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