30-seconds-of-code/getType.md at f690d12b229936a3e5203fb7504079d2edc81cea

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wangzongxu f690d12b22 Update getType.md

fix result to lower case

2018-01-10 10:45:55 +08:00

Returns the native type of a value.

Returns lowercased constructor name of value, "undefined" or "null" if value is undefined or null.

const getType = v =>
  v === undefined ? 'undefined' : v === null ? 'null' : v.constructor.name.toLowerCase();

getType(new Set([1, 2, 3])); // 'set'