envBool() function

Reads a boolean environment variable, accepting the human-friendly spellings 1/true/yes/on and 0/false/no/off (case-insensitive). The previous !!+value idiom parsed values like true as NaN, i.e. false.

Signature:

export declare function envBool(name: string, defaultValue?: boolean): boolean;

Parameters

Parameter	Type	Description
name	string	environment variable name
defaultValue	boolean	(Optional) used when unset or unrecognized

Returns:

boolean

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