How do I load my script into the node.js REPL?

Question

I have a script foo.js that contains some functions I want to play with in the REPL.

Is there a way to have node execute my script and then jump into a

Answer 1

Here's a bash function version of George's answer:

noderepl() {
    FILE_CONTENTS="$(< $1 )"
    node -i -e "$FILE_CONTENTS"
}

If you put this in your ~/.bash_profile you can use it like an alias, i.e.:

noderepl foo.js

Answer 2

i always use this command

node -i -e "$(< yourScript.js)"

works exactly as in Python without any packages.

Answer 3

Another way is to define those functions as global.

global.helloWorld = function() { console.log("Hello World"); }

Then preload the file in the REPL as:

node -r ./file.js

Then the function helloWorld can be accessed directly in the REPL.

Answer 4

Currently you can't do that directly, but you can mylib = require('./foo.js') in the REPL. Remember methods are exported, not declared as globals.

Answer 5

Why not load the file into an interactive node repl?

node -h
-e, --eval script          evaluate script
-i, --interactive          always enter the REPL even if stdin

node -e 'var client = require("./build/main/index.js"); console.log("Use `client` in repl")' -i

Then you can add to package.json scripts

"repl": "node -e 'var client = require(\"./build/main/index.js\"); console.log(\"Use `client` in repl\")' -i",

tested using node v8.1.2