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47 lines
1.2 KiB
47 lines
1.2 KiB
'use strict'; |
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var GetIntrinsic = require('get-intrinsic'); |
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var $TypeError = GetIntrinsic('%TypeError%'); |
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var IsPropertyKey = require('./IsPropertyKey'); |
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var SameValue = require('./SameValue'); |
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var Type = require('./Type'); |
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// IE 9 does not throw in strict mode when writability/configurability/extensibility is violated |
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var noThrowOnStrictViolation = (function () { |
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try { |
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delete [].length; |
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return true; |
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} catch (e) { |
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return false; |
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} |
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}()); |
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// https://ecma-international.org/ecma-262/6.0/#sec-set-o-p-v-throw |
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module.exports = function Set(O, P, V, Throw) { |
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if (Type(O) !== 'Object') { |
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throw new $TypeError('Assertion failed: `O` must be an Object'); |
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} |
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if (!IsPropertyKey(P)) { |
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throw new $TypeError('Assertion failed: `P` must be a Property Key'); |
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} |
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if (Type(Throw) !== 'Boolean') { |
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throw new $TypeError('Assertion failed: `Throw` must be a Boolean'); |
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} |
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if (Throw) { |
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O[P] = V; // eslint-disable-line no-param-reassign |
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if (noThrowOnStrictViolation && !SameValue(O[P], V)) { |
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throw new $TypeError('Attempted to assign to readonly property.'); |
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} |
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return true; |
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} |
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try { |
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O[P] = V; // eslint-disable-line no-param-reassign |
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return noThrowOnStrictViolation ? SameValue(O[P], V) : true; |
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} catch (e) { |
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return false; |
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} |
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};
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