19 lines
533 B
JavaScript
19 lines
533 B
JavaScript
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'use strict';
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var $SyntaxError = require('es-errors/syntax');
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var callBound = require('call-bind/callBound');
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var $SymbolValueOf = callBound('Symbol.prototype.valueOf', true);
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// https://262.ecma-international.org/9.0/#sec-thissymbolvalue
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module.exports = function thisSymbolValue(value) {
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if (!$SymbolValueOf) {
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throw new $SyntaxError('Symbols are not supported; thisSymbolValue requires that `value` be a Symbol or a Symbol object');
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}
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if (typeof value === 'symbol') {
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return value;
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}
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return $SymbolValueOf(value);
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};
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