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15 lines
705 B
15 lines
705 B
var call = require('../internals/function-call'); |
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var isCallable = require('../internals/is-callable'); |
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var isObject = require('../internals/is-object'); |
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var $TypeError = TypeError; |
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// `OrdinaryToPrimitive` abstract operation |
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// https://tc39.es/ecma262/#sec-ordinarytoprimitive |
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module.exports = function (input, pref) { |
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var fn, val; |
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if (pref === 'string' && isCallable(fn = input.toString) && !isObject(val = call(fn, input))) return val; |
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if (isCallable(fn = input.valueOf) && !isObject(val = call(fn, input))) return val; |
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if (pref !== 'string' && isCallable(fn = input.toString) && !isObject(val = call(fn, input))) return val; |
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throw $TypeError("Can't convert object to primitive value"); |
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};
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