{"action":"opened","issue":{"url":"https://api.github.com/repos/knockout/knockout/issues/1959","labels_url":"https://api.github.com/repos/knockout/knockout/issues/1959/labels{/name}","comments_url":"https://api.github.com/repos/knockout/knockout/issues/1959/comments","events_url":"https://api.github.com/repos/knockout/knockout/issues/1959/events","html_url":"https://github.com/knockout/knockout/issues/1959","id":122218214,"number":1959,"title":"Fieldsets causes ReferenceError in Chrome iOS","user":{"login":"esbenp","id":934819,"avatar_url":"https://avatars.githubusercontent.com/u/934819?v=3","gravatar_id":"","url":"https://api.github.com/users/esbenp","html_url":"https://github.com/esbenp","followers_url":"https://api.github.com/users/esbenp/followers","following_url":"https://api.github.com/users/esbenp/following{/other_user}","gists_url":"https://api.github.com/users/esbenp/gists{/gist_id}","starred_url":"https://api.github.com/users/esbenp/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/esbenp/subscriptions","organizations_url":"https://api.github.com/users/esbenp/orgs","repos_url":"https://api.github.com/users/esbenp/repos","events_url":"https://api.github.com/users/esbenp/events{/privacy}","received_events_url":"https://api.github.com/users/esbenp/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-12-15T08:24:10Z","updated_at":"2015-12-15T08:24:10Z","closed_at":null,"body":"The following code causes error `ReferenceError: Can't find variable: fieldset` in Chrome iOS (47.2526.70). I have only tested this on an iPad mini. \r\n\r\n```javascript\r\n<!DOCTYPE html>\r\n<html lang=\"en\">\r\n  <head>\r\n    <meta charset=\"utf-8\">\r\n  </head>\r\n  <body>\r\n\r\n    <div id=\"app\">\r\n      <fieldset></fieldset>\r\n\r\n      <div data-bind=\"foreach: errors\">\r\n        <div data-bind=\"text: $data\"></div>\r\n      </div>\r\n    </div>\r\n\r\n    <script type=\"text/javascript\" src=\"https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.0/knockout-min.js\"></script>\r\n    <script type=\"text/javascript\">\r\n    var viewmodel = function() {\r\n      this.errors = ko.observableArray();\r\n\r\n      var self = this;\r\n      window.onerror = function(message, url, line, column, error) {\r\n        self.errors.push(message);\r\n      }\r\n    }\r\n\r\n    ko.applyBindings(new viewmodel(), document.getElementById('app'));\r\n    </script>\r\n\r\n  </body>\r\n</html>\r\n```"}}