v8 native functions

[Eomm]

Give this script that uses the --allow-natives-syntax v8 flag:

node --allow-natives-syntax file.js

'use strict'
// file.js

const a = {}
const b = {}

console.log(%HaveSameMap(a, b)) // <---- native syntax here

I can't setup Biome to recognize the %HaveSameMap syntax:

Runtime functions are written in C++ and called from JavaScript through a %-prefix

Plus:

  ✖ Expected an expression for the left hand side of the `%` operator.
  
    4 │ const b = {}
    5 │ 
  > 6 │ console.log(% HaveSameMap(a, b))
      │             ^
    7 │ 
  
  ℹ This operator requires a left hand side value

Do you know how to configure it?

[arendjr]

I’m afraid this is not currently supported by Biome, since the syntax is not valid JS/TS.

We probably could support it, similar to how we support JSX too, but it’s not currently implemented.

[Conaclos]

This is an ivalid ECMAScript syntax. I am not sure if we want to support this. What about the behavior of other tools?