How to call your functions externally while passing data to it

am trying to deploy a node js cloud function. how do i pass data from my backend to the function to execute

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You can pass your data as a query parameter in your HTTP request.

For example, you can take a look at the following function that accepts an argument:

Code sample:

function main(args) {
    let name = || 'stranger'
    let greeting = 'Hello ' + name + '!'
    return {"body": greeting}

exports.main = main

Accessing the function with the ?name= query parameter will greet the specified name. For example, ?name=Alice will return Hello Alice. Using no query parameters will return Hello stranger.

The HTTP request and how exactly the query parameter is passed, would depend on the language and the framework that you are using.

Hope that this helps!