regex-jinja-specific^1.0.1

Regular expression for detecting Python-specific Jinja code

Install via npm

npm i regex-jinja-specific

The default is exported, so instead of isJinjaSpecific below, you can name the consumed function however you want.

Consume via a require():

const isJinjaSpecific = require("regex-jinja-specific");

or as an ES Module:

import isJinjaSpecific from "regex-jinja-specific";

Install as a script, via CDN

Put this in your HTML:

<script src="https://cdn.jsdelivr.net/npm/regex-jinja-specific/dist/regex-jinja-specific.umd.js">

Then, you’ll get a global variable regexJinjaSpecific in your Global object and you consume it like this:

const isJinjaSpecific = regexJinjaSpecific;

This isJinjaSpecific is your main function. See its API in the main section.

Trivia

This program has 22 assertions in its unit tests. That's less than all unit test assertions' median (50) and less than geometric mean (70).

In monorepo, one other package, regex-jinja-specific, consumes this package.

§ Quick Take

import { strict as assert } from "assert";
import isJinjaSpecific from "regex-jinja-specific";

assert.equal(
  isJinjaSpecific().test(
    `<div>{{ '%.2f'|format(3.1415926) }}</div>`
  ),
  true
);

// in case of ambiguous, Nunjucks-or-Jinja code
assert.equal(
  isJinjaSpecific().test(`<div>{{ value }}</div>`),
  false
);

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§ Purpose

Nunjucks and Jinja templating languages' syntax is mostly the same. There are certain code patterns which are Jinja-specific, mostly coming from Python functionality. This program, a regex, matches those patterns.