node.js - Have to run sudo npm install -g everytime -

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i getting started on command line application node, have noticed every time make change index.js file have run "sudo npm install -g" relfect change. example

index.js

#!/usr/bin/env node console.log("hello");

under package.json 

"bin": {     "movie": "index.js"   },

if run "movie" terminal prints out "hello".

now if change print statement under index.js console.log("world") , run "movie" terminal prints outs "hello" rather "world". if "sudo npm install -g" , run "movie" command, picks "world".

i not sure why happening?

use npm link instead of npm install. create symlink on directory can use testing if intalled locally on directory.


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