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17 lines
755 B
17 lines
755 B
3 years ago
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var global = require('../internals/global');
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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 = global.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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