Allow default variable values ​​when testing CustomFunction

[mokeyish]

Testing code is more cumbersome when CustomFunction requires input variables.

const question = $question ?? 'my default question'

[HenryHengZJ]

The pre-requisite is that you need to have the variables already specified in the UI, right?

[mokeyish]

The pre-requisite is that you need to have the variables already specified in the UI, right?

When CustomFunction needs to receive variables from chatflow, testing CustomFunction often reports errors. This can be forcibly defined as undefined. If the variable is undefined, the default value in the code will be used.

This is only a temporary fix for better testing CustomFunction.

• before

  // const question = $question  // we need comment this line to avoid error.
  const question = "my default question"

• after

  const question = $question ?? "my default question"

[HenryHengZJ]

for future reference:

1.) Have a custom js function node with input variable, then hit execute:

We will see the error

2.) With the changes, it will becomes undefined (not throwing error):