topic IE11 'insertBefore' of undefined or null reference in ArcGIS JavaScript Maps SDK Questions https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/ie11-insertbefore-of-undefined-or-null-reference/m-p/620284#M57943 <HTML><HEAD></HEAD><BODY><P>I've had this bug for quite some time, and it has persisted through multiple releases of the JavaScript API V4. Currently, I'm using v4.5.</P><P></P><P>In IE11, I often receive the error "Unable to get property 'insertBefore' of undefined or null reference File: dojo.js, Line: 18, Column: 301". The error is intermittent and sometimes just a single page refresh is all that's required. The application in question is mostly based on the ArcGIS JS API and Angular 5. The JS API is being loaded using esri-loader (<A class="link-titled" href="https://github.com/Esri/esri-loader" title="https://github.com/Esri/esri-loader">GitHub - Esri/esri-loader: A tiny library to help load ArcGIS API for JavaScript modules in non-Dojo applications</A>).</P><P></P><P>Has anyone else seen this before and found a solution? I've seen a lot of similar questions and issues on StackOverflow and github, but haven't seen much in the way of solutions.</P></BODY></HTML> Tue, 08 Jan 2019 17:11:55 GMT CharlieElverson 2019-01-08T17:11:55Z IE11 'insertBefore' of undefined or null reference https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/ie11-insertbefore-of-undefined-or-null-reference/m-p/620284#M57943 <HTML><HEAD></HEAD><BODY><P>I've had this bug for quite some time, and it has persisted through multiple releases of the JavaScript API V4. Currently, I'm using v4.5.</P><P></P><P>In IE11, I often receive the error "Unable to get property 'insertBefore' of undefined or null reference File: dojo.js, Line: 18, Column: 301". The error is intermittent and sometimes just a single page refresh is all that's required. The application in question is mostly based on the ArcGIS JS API and Angular 5. The JS API is being loaded using esri-loader (<A class="link-titled" href="https://github.com/Esri/esri-loader" title="https://github.com/Esri/esri-loader">GitHub - Esri/esri-loader: A tiny library to help load ArcGIS API for JavaScript modules in non-Dojo applications</A>).</P><P></P><P>Has anyone else seen this before and found a solution? I've seen a lot of similar questions and issues on StackOverflow and github, but haven't seen much in the way of solutions.</P></BODY></HTML> Tue, 08 Jan 2019 17:11:55 GMT https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/ie11-insertbefore-of-undefined-or-null-reference/m-p/620284#M57943 CharlieElverson 2019-01-08T17:11:55Z