Regarding compatibility between ECMAScript specification and actual implementation; It is fairly easy to check out the data about browser support for ECMAScript
secondary-indexes
uiscrollviewdelegate
bias-neuron
kubernetes-pod
go-cmp
nzsql
aws-lambda-containers
interpreter
random-data
html.actionlink
web-animations
docbook
nginx-config
google-polyline
amazon-workspaces
input-split
wine
angular2-changedetection
eof
wowza-transcoder
http-compression
emacsclient
electron.net
onflow-cadence
eonasdan-datetimepicker
aspnet-contrib
primeng-tree
azure-management-portal
sessionfactory
templatetags
