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More defensive deepFreeze()

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IE11 chokes on Object.freeze(undefined)
This commit is contained in:
Jermolene 2017-03-17 14:20:04 +00:00
parent 779e62a30f
commit b9fbe12118
1 changed files with 7 additions and 5 deletions
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12
core/modules/utils/utils.js
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@ -224,11 +224,13 @@ exports.extendDeepCopy = function(object,extendedProperties) {
exports.deepFreeze = function deepFreeze(object) {
var property, key;
Object.freeze(object);
for(key in object) {
property = object[key];
if($tw.utils.hop(object,key) && (typeof property === "object") && !Object.isFrozen(property)) {
deepFreeze(property);
if(object) {
Object.freeze(object);
for(key in object) {
property = object[key];
if($tw.utils.hop(object,key) && (typeof property === "object") && !Object.isFrozen(property)) {
deepFreeze(property);
}
}
}
};