Answers for "LF will be replaced by CRLF in App.js"

The file will have its original line endings in your working directory

# If you are a single developer working on a windows machine,
# and you don't care that git automatically replaces LFs to CRLFs,
# you can turn this warning off by typing the following in the git command line

git config core.autocrlf true

LF will be replaced by CRLF in App.js

git config core.autocrlf false