Update

syntax/html/electron.vim

@@ -0,0 +1,19 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'html5') == -1
+  
+" Vim syntax file
+" Language:     Electron
+" Maintainer:   othree <othree@gmail.com>
+" URL:          https://github.com/othree/html5.vim
+" Last Change:  2017-03-15
+" License:      MIT
+
+" <webview> https://electron.atom.io/docs/api/webview-tag/
+syn keyword htmlTagName contained webview
+
+syn keyword htmlArg contained autosize nodeintegration plugins preload httpreferrer
+syn keyword htmlArg contained useragent disablewebsecurity partition allowpopups 
+syn keyword htmlArg contained webpreferences blinkfeatures disableblinkfeatures
+syn keyword htmlArg contained guestinstance disableguestresize 
+
+
+endif