46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
'use strict';
|
|
|
|
var $TypeError = require('es-errors/type');
|
|
|
|
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://262.ecma-international.org/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 (typeof 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;
|
|
}
|
|
|
|
};
|