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on this file since 59329aa was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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[6a3a178] | 1 | var baseIsNative = require('./_baseIsNative'),
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| 2 | isMaskable = require('./_isMaskable');
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| 3 |
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| 4 | /** Error message constants. */
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| 5 | var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.';
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| 6 |
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| 7 | /**
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| 8 | * Checks if `value` is a pristine native function.
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| 9 | *
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| 10 | * **Note:** This method can't reliably detect native functions in the presence
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| 11 | * of the core-js package because core-js circumvents this kind of detection.
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| 12 | * Despite multiple requests, the core-js maintainer has made it clear: any
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| 13 | * attempt to fix the detection will be obstructed. As a result, we're left
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| 14 | * with little choice but to throw an error. Unfortunately, this also affects
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| 15 | * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
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| 16 | * which rely on core-js.
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| 17 | *
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| 18 | * @static
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| 19 | * @memberOf _
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| 20 | * @since 3.0.0
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| 21 | * @category Lang
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| 22 | * @param {*} value The value to check.
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| 23 | * @returns {boolean} Returns `true` if `value` is a native function,
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| 24 | * else `false`.
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| 25 | * @example
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| 26 | *
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| 27 | * _.isNative(Array.prototype.push);
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| 28 | * // => true
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| 29 | *
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| 30 | * _.isNative(_);
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| 31 | * // => false
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| 32 | */
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| 33 | function isNative(value) {
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| 34 | if (isMaskable(value)) {
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| 35 | throw new Error(CORE_ERROR_TEXT);
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| 36 | }
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| 37 | return baseIsNative(value);
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| 38 | }
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| 39 |
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| 40 | module.exports = isNative;
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