You have to add it to package.json
as a resource.
/**
* Extra resources to be copied along when build
*/
"resources": [
"resources/css/app.css",
"resources/images",
"resources/static",
"resources/libs",
"resources/translations"
],
or even better as a css file.
/**
* List of all CSS assets in the right inclusion order.
* Each item is an object with the following format:
* {
* "path": "path/to/item.css" // Path to file, if local file it must be relative to this app.json file
* "remote": true // (Optional)
* // - Defaults to undefined (falsey) to signal a local file which will be copied
* // - Specify true if this file is a remote file which will not to be copied
* "update": "delta" // (Optional)
* // - If not specified, this file will only be loaded once, and
* // cached inside localStorage until this value is changed to either one below
* // - "delta" to enable over-the-air delta update for this file
* // - "full" means full update will be made when this file changes
*
* }
*/
"css": [
{
"path": "resources/libs/Arcgis v3.11/arcgis311.css",
"remote": true
},
{
"path": "resources/css/app.css",
"remote": true
}
]