Inspiring

Answered

What ancient version of javascript is this?

Forum|Forum|1 year ago
September 24, 2024
3 replies
1041 views

I got the error:

Map does not have a constructor on this simple line:

copyMap = new Map();

Isnt map included since 10 years or so? id i do something wrong or do I really have to implement is myself?

Correct answer Joel Cherney

Adobe's ExtendScript is based on ECMAScript 3, from 1999.

m1b

Community Expert

You could also try UXP scripting. It's a bit more modern (uses Javascript 6) but still isn't quite at API parity with the old ExtendScript which most scripts are still written in.

T

Thomas_Calvin

Inspiring

I just ported an admittedly pretty simple script from ExtendScript to UXP.

The first pitfall people are likely to hit is that the subscript operator, [], doesn't work for collections like paragraphs, as in

app.selection[0].paragraphs[0]

Only the selection is an array, so you have to say,

app.selection[0].paragraphs.item(0)

Beyond that, it worked fine. Just put

let { app } = require("indesign");

at the top of your script.

Peter Kahrel

Community Expert

There is some documentation on ES > UXP migration, e.g.:

https://developer.adobe.com/indesign/uxp/resources/migration-guides/extendscript/

Joel Cherney

Correct answer

Community Expert

Adobe's ExtendScript is based on ECMAScript 3, from 1999.

Joel Cherney

Community Expert

I'm not sure how I managed to delete my mention of polyfills before hitting "Post." But no, I've found that we typically don't have to actually reimplement this kind of stuff ourselves. Someone else has most likely already done so - usually some years ago, in the name of maintaining backwards compatibility for older web browsers. Every single time I've thoughtlessly used something like map or indexOf, I've been able to find a perfectly functional polyfill in a few clicks.

rob day

Community Expert

But no, I've found that we typically don't have to actually reimplement this kind of stuff ourselves.

https://community.adobe.com/t5/indesign-discussions/copying-page-content/td-p/14882538

rob day

Community Expert

Hi @Lordrhavin , there’s no map object or maps collection. There are collections\objects like ObjectStyleExportTagMaps, StyleExportTagMaps, XMLExportMap, etc. Maybe some context would help, or you can search the API here:

https://www.indesignjs.de/extendscriptAPI/indesign-latest/#Application.html

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