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In JavaScript, a truthy value is a value that translates to true
when evaluated in a Boolean context. All values are truthy unless they are defined as falsy (i.e., except for false
, 0
, ""
, null
, undefined
, and NaN
).
JavaScript uses type coercion in Boolean contexts.
Examples of truthy values in JavaScript (which will translate to true and thus execute the if
block):
if (true) if ({}) if ([]) if (42) if ("foo") if (new Date()) if (-42) if (3.14) if (-3.14) if (Infinity) if (-Infinity)