How do you read a txt file to a string in the JS target of a Kotlin Multiplatform project?

# javascript

[Justin]

How do you read a txt file to a string in the JS target of a Kotlin Multiplatform project?

[Bruno_]

haven't tested it but
https://stackoverflow.com/questions/9168737/read-a-text-file-using-node-js
and

kotlinext.js.require("fs").asDynamic().readFile(/*...*/)

should help you

[Bruno_]

long story short, the same way as in node

[Justin]

thanks I will try that!

[Justin]

yea I knew I needed readFile (or readFileSync), but couldn’t figure out how to call that method in my JS target code

[Justin]

How do I use kotlinext? Unresolved reference by default.

[Justin]

@Bruno_ ^

[Bruno_]

do you have the nodejs target setup?

[Justin]

yes - in my build.gradle.kts:

[...]

js("nodeJs") {
    nodejs()
}

[...]

[Bruno_]

in the exmaple module the compiling succeeded but I got something "couldn't find fs module", maybe that'll help you https://github.com/mightybruno/kotlin-vue

[gaetan]

@Justin Excuse my curiosity, but in what context does it make sense to use kotlin/JS inside nodejs (instead of a kotlin server like ktor)?

[Justin]

@gaetan I am building a library that targets iOS, Android, and Web clients. Library just contains business logic that we used to implement separately on all three platforms.

[gaetan]

So your question is for the web client? How can it access files ?

[Justin]

for my situation, the clients themselves do not need to access files. the files are for internal testing. but that still means that each platform needs a method for ingesting the files

[Justin]

the solution i implemented for the js target was:

actual fun readFile(filePath: String) : String? {
    val fs = js("require('fs')")
    return fs.readFileSync(filePath, "utf8") as? String
}

in case it helps anyone

[gaetan]

Ok. I understand.