regex-jinja-specific^2.0.14

Regular expression for detecting Python-specific Jinja code

Install via npm

npm i regex-jinja-specific

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"></script>

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

const { isJinjaSpecific } = regexJinjaSpecific;

Trivia

This program has 19 assertions in its unit tests. That's less than all unit test assertions' median (44) and less than geometric mean (72).

In monorepo, one other package, detect-templating-language, 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.