What ECMA standard do expressions support?

Question

Hi all. I know that for scripting .jsx files, it's ECMA 262, but after taking a long break from animating to learn all about coding and scripting, I've recently come back and was shocked to see that I can use this in an expression: Object.keys(data).forEach(key => {
  console.log(key)
}) And this throws no errors. Obviously this has no effect because AE doesn't have a console (...right? I wish it did. Can I print data from expressions anywhere, to see coordinate data, etc?) but the implication of Object.keys, Array.prototype.forEach, and arrow functions leads me to think this is at least ECMA2015/ES6? Is it fair to assume these actually work, or is this just some bug where the expression validation doesn't catch them as errors?

Inventsable · Answer

What I'm trying to do is manually recreate the bezier handles of any given pathPoint. This does work inside a Shape Layer's Path as an expression to generate a line between the tangentIn and it's target anchor:

const parentLayer = thisComp.layer("line");
const parentPath = parentLayer.content("line").content("Path 1").path;
let vertices = [0,1]

const data = {
  position: parentLayer.transform.position,
  anchor: parentLayer.transform.anchorPoint,
  vertex: parentPath.points()[1],
  tangent: parentPath.inTangents()[1],
};

createPath(
  vertices.map((index, i) => {
    let offsetX = 0;
    let offsetY = 0;
    Object.keys(data).forEach((val, e) => {
      if (i < 1 || val !== "tangent") {
        offsetX = offsetX + data[val][0];
        offsetY = offsetY + data[val][1];
      }
    });
    return [offsetX, offsetY];
  }),
  [],
  [],
  false
);

Which is awesome. ES6 Array methods

Sign up

To post, reply, or follow discussions, please sign in with your Adobe ID.

Sign in to Adobe Community

To post, reply, or follow discussions, please sign in with your Adobe ID.