Math.max() - JavaScript | MDN

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015. Learn moreSee full compatibilityReport feedback

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“const array1 = [1, 3, 2]; 8 ​ 9 console.log(Math.max(...array1)); 10 // Expected output: 3 11 ​”

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引数が与えられなかった場合、その結果は -Infinity になります。 1 つでも数値に変換できない引数があれば、結果は NaN になります。