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