The Number isFinite() method

Mar 25, 2019

Learn how the JavaScript Number.isFinite() method checks whether a value is a finite number, returning false for strings, booleans, objects, and arrays.

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Returns true if the passed value is a finite number. Anything else, booleans, strings, objects, arrays, returns false:

Number.isFinite(1) //true
Number.isFinite(-237) //true
Number.isFinite(0) //true
Number.isFinite(0.2) //true

Number.isFinite('Flavio') //false
Number.isFinite(true) //false
Number.isFinite({}) //false
Number.isFinite([1, 2, 3]) //false

Tagged: JavaScript · All topics

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