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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/lodash/isNaN.js | |
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Diffstat (limited to 'node_modules/lodash/isNaN.js')
-rw-r--r-- | node_modules/lodash/isNaN.js | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/node_modules/lodash/isNaN.js b/node_modules/lodash/isNaN.js new file mode 100644 index 0000000..7d0d783 --- /dev/null +++ b/node_modules/lodash/isNaN.js @@ -0,0 +1,38 @@ +var isNumber = require('./isNumber'); + +/** + * Checks if `value` is `NaN`. + * + * **Note:** This method is based on + * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as + * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for + * `undefined` and other non-number values. + * + * @static + * @memberOf _ + * @since 0.1.0 + * @category Lang + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`. + * @example + * + * _.isNaN(NaN); + * // => true + * + * _.isNaN(new Number(NaN)); + * // => true + * + * isNaN(undefined); + * // => true + * + * _.isNaN(undefined); + * // => false + */ +function isNaN(value) { + // An `NaN` primitive is the only value that is not equal to itself. + // Perform the `toStringTag` check first to avoid errors with some + // ActiveX objects in IE. + return isNumber(value) && value != +value; +} + +module.exports = isNaN; |