2018-09-18 Mosh nodejs lecture 2

in newer version of npm,

npm i mongodbwould automically save dependency info of mongodb into package.json of current nodejs project only in the older version、npm i mongodb -Sis need

since package.json is atomaticaly udate once you run

npm i mongodbthere isのneed to change package.json manaualy.when you publish your code to git,justtouch .gitignoreand add node_modules/to it,which would ignore the fodler
node_modules/
when pusing to git.
on the server,just pull the code and runnpm i、
this would install modules requeired base on the package.json file

npm list would show all the dependencies in current project,including a tree dependceis

if you dot want such details,runnpm list --depth=0this only list the modules required by your project、and would not show other modules depended by the former modules.

the dependcies in package.json of any module could be shown by:

npm view mongodb dependenciesthis would list the dependencies,whilenpm view mongodbwould show all detail from package.json of mongodb module

npm outdated

this shows the out dated modules depended by your current project、see Sem Version and Tilda Versionnpm outdated -gshows outdated modules globally

to see the real installed module version、check the packge.json in the project、or the one in the node_modules/Package Name folder

or runnpm list --depth=0