Number.isInteger method was designed to be used with numbers in order to test if it is an integer or not (NaN, Infinity, float...).
Number.isInteger
Number.isInteger(12) // true Number.isInteger(12.0) // true Number.isInteger(12.5) // false
developer.mozilla.org/en-US/docs/W... Using typeof mynum === "number" is a better solution to test if a value is a number.
typeof mynum === "number"
typeof mynum // number typeof mynumStr // string
Note, that the Number rounding of floats in JavaScript is not accurate
(0.1 + 0.2) === 0.3 // false
Since this rounding affects integer representation, too, you should also consider Number.isSafeInteger
Number.isSafeInteger
developer.mozilla.org/en-US/docs/W...
Also please consider Integer boundaries in JS, that are represented by Number.MAX_SAFE_INTEGER and Number.MIN_SAFE_INTEGER
Number.MAX_SAFE_INTEGER
Number.MIN_SAFE_INTEGER
Edit: sry wanted to post on top level, somehow ended up as comment on yours
Awesome, thanks Jan!
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Number.isIntegermethod was designed to be used with numbers in order to test if it is an integer or not (NaN, Infinity, float...).developer.mozilla.org/en-US/docs/W...
Using
typeof mynum === "number"is a better solution to test if a value is a number.Note, that the Number rounding of floats in JavaScript is not accurate
Since this rounding affects integer representation, too, you should also consider
Number.isSafeIntegerdeveloper.mozilla.org/en-US/docs/W...
Also please consider Integer boundaries in JS, that are represented by
Number.MAX_SAFE_INTEGERandNumber.MIN_SAFE_INTEGERdeveloper.mozilla.org/en-US/docs/W...
developer.mozilla.org/en-US/docs/W...
Edit: sry wanted to post on top level, somehow ended up as comment on yours
Awesome, thanks Jan!