ampscript-data

Canonical AMPscript function catalog, keywords, and personalization strings for Salesforce Marketing Cloud (SFMC) tooling.

This package is the single source of truth consumed by:

• eslint-plugin-sfmc — unknown-function detection and arity validation
• prettier-plugin-sfmc — casing normalization
• VSCode: sfmc-language — completions, hover, and diagnostics

Installation

npm install ampscript-data

Usage

import {
    FUNCTIONS,
    AMPSCRIPT_KEYWORDS,
    PERSONALIZATION_STRINGS,
    DEPRECATED_FUNCTIONS,
    functionLookup,
    functionNames,
    CANONICAL_FUNCTIONS,
    FUNCTION_CANONICAL_MAP,
    deprecatedFunctionLookup,
    isEmailExcluded,
    isMcnSupported,
    getMcnApiVersion,
    getMcnNotes,
} from 'ampscript-data';

FUNCTIONS

An array of all known AMPscript functions with full metadata:

import { FUNCTIONS } from 'ampscript-data';

for (const fn of FUNCTIONS) {
    console.log(fn.name);        // e.g. 'Lookup'
    console.log(fn.minArgs);     // minimum argument count
    console.log(fn.maxArgs);     // maximum argument count (Infinity = variadic)
    console.log(fn.category);    // e.g. 'Data Extension'
    console.log(fn.description); // human-readable description
    console.log(fn.params);      // array of { name, description, type?, optional? }
    console.log(fn.returnType);  // e.g. 'string'
    console.log(fn.syntax);      // canonical signature string
    console.log(fn.example);     // usage example (where available)
    console.log(fn.docUrl);      // URL to official Salesforce developer docs
    console.log(fn.guideUrl);    // URL to ampscript.guide reference page
    console.log(fn.mcnSince);    // API version when MCN support was added (null = MCE only)
    console.log(fn.mcnNotes);    // behavioral differences on MCN (null = none)
}

functionLookup

A Map<string, FunctionEntry> keyed by lowercase function name for O(1) lookups:

import { functionLookup } from 'ampscript-data';

const entry = functionLookup.get('lookup');

functionNames

A Set<string> of all function names in lowercase — useful for existence checks:

import { functionNames } from 'ampscript-data';

if (functionNames.has('lookup')) { /* ... */ }

CANONICAL_FUNCTIONS

An array of function names in their canonical casing (e.g. 'Lookup'), used for casing normalization:

import { CANONICAL_FUNCTIONS } from 'ampscript-data';

FUNCTION_CANONICAL_MAP

A Map<string, string> from lowercase name to canonical-cased name:

import { FUNCTION_CANONICAL_MAP } from 'ampscript-data';

FUNCTION_CANONICAL_MAP.get('lookup'); // 'Lookup'

DEPRECATED_FUNCTIONS

An array of deprecated function entries with the same shape as FUNCTIONS:

import { DEPRECATED_FUNCTIONS } from 'ampscript-data';

deprecatedFunctionLookup

A Map<string, FunctionEntry> for deprecated functions, keyed by lowercase name:

import { deprecatedFunctionLookup } from 'ampscript-data';

isEmailExcluded

Returns true if the function is not available in email send contexts:

import { isEmailExcluded } from 'ampscript-data';

isEmailExcluded('HTTPGet'); // true — not available in email

Marketing Cloud Next (MCN) compatibility

Each FunctionEntry has two MCN fields:

| Field | Type | Description | |---|---|---| | mcnSince | number \| null | API version when MCN support was added (e.g. 67); null means MCE only | | mcnNotes | string \| null | Behavioral differences on MCN vs MCE; null means no known differences |

Three helper functions are exported for programmatic MCN checks:

isMcnSupported

Returns true when the function is available on Marketing Cloud Next:

import { isMcnSupported } from 'ampscript-data';

isMcnSupported('Lookup');   // true
isMcnSupported('HTTPGet');  // false

getMcnApiVersion

Returns the API version number (e.g. 67) when MCN support was added, or null for MCE-only functions:

import { getMcnApiVersion } from 'ampscript-data';

getMcnApiVersion('Lookup');  // 67
getMcnApiVersion('HTTPGet'); // null

getMcnNotes

Returns a string describing behavioral differences on MCN, or null when the function behaves identically across platforms:

import { getMcnNotes } from 'ampscript-data';

getMcnNotes('FormatDate');    // "In Marketing Cloud Next, this function uses ..."
getMcnNotes('Lookup');        // "In Marketing Cloud Next, an odd number of search ..."
getMcnNotes('ProperCase');    // null

AMPSCRIPT_KEYWORDS

An array of AMPscript language keyword descriptors (if, for, set, etc.). Each entry carries a short description and a completion snippet with ${n:placeholder} tab stops:

import { AMPSCRIPT_KEYWORDS } from 'ampscript-data';

for (const kw of AMPSCRIPT_KEYWORDS) {
    console.log(kw.name);        // e.g. 'if'
    console.log(kw.description); // human-readable description
    console.log(kw.snippet);     // completion body, e.g. 'if ${1:condition} then\n\t${2}\nendif'
}

PERSONALIZATION_STRINGS

An array of AMPscript personalization string descriptors (subscriber attributes, system variables, etc.):

import { PERSONALIZATION_STRINGS } from 'ampscript-data';

for (const ps of PERSONALIZATION_STRINGS) {
    console.log(ps.name);        // e.g. 'emailaddr'
    console.log(ps.description); // human-readable description
}

License

MIT