is-html-attribute-closing

Is a character on a given index a closing of an HTML attribute?

Install

This package is pure ESM. If you're not ready yet, install an older version of this program, 2.3.0 (npm i is-html-attribute-closing@2.3.0).

npm i is-html-attribute-closing

Quick Take

import { strict as assert } from "assert";

import { isAttrClosing } from "is-html-attribute-closing";

const str = '<a href="zzz" target="_blank" style="color: black;">';

// <a href="zzz" target="_blank" ...
//                      ^
//                  index 21

// <a href="zzz" target="_blank" ...
//                             ^
//                         index 28

assert.equal(
  isAttrClosing(
    str, // reference string
    21, // known opening (or in absence of a quote, a start of a value)
    28, // we ask, is this a closing on the attribute?
  ),
  true, // the answer
);

Documentation

Please visit codsen.com for a full description of the API.

Contributing

To report bugs or request features or assistance, raise an issue on GitHub.

Licence

MIT License.

Copyright © 2010-2025 Roy Revelt and other contributors.

Change Log

All notable changes to this project will be documented in this file. See Conventional Commits for commit guidelines.

4.0.0 (2022-12-01)

BREAKING CHANGES

• Minimum supported Node version is v14.18; we're dropping v12 support

3.1.0 (2022-08-12)

Features

• export types (11b5fb9)

3.0.0 (2021-09-09)

Features

• migrate to ES Modules (8c9d95d)

BREAKING CHANGES

• programs now are in ES Modules and won't work with Common JS require()

2.3.0 (2021-05-24)

Features

• config file based major bump blacklisting (e15f9bb)

2.2.6 (2021-04-11)

Reverts

• Revert "chore: setup refresh" (23cf206)

2.2.0 (2021-03-23)

Features

• improved recognition of HTML inline style attribute patterns (5c104d3)

2.1.0 (2021-02-07)

Features

• improved ERB templating tag recognition (ecb3272)

2.0.1 (2021-01-28)

Fixed

• add testStats to npmignore (f3c84e9)

2.0.0 (2021-01-23)

Features

• rewrite in TS, start using named exports (6a8cf5a)

BREAKING CHANGES

• previously, you'd consume like: import isAttrClosing from ... - now import { isAttrClosing } from ...

1.5.0 (2020-12-11)

Fixed

• correctly interpret equal chars inside urls (71f8dcf)

Features

• improve the safeguards against legit equal characters (d1b34fa)

1.4.0 (2020-11-28)

Accidental version bump during migration to SourceHut. Sorry about that.

1.3.0 (2020-10-12)

Features

• algorithm improvements (e2b2471)
• recognise nested rogue quote pairs inside attr values (7366a63)

1.2.0 (2020-05-17)

Features

• insurance against the Killer Triplet (21c64a2)

1.1.0 (2020-04-13)

Features

• initial scaffolding (5968866)
• improve the mismatching quote recognition (967bd66)
• improvements to mismatching HTML attribute quote pair recognition (050dbe0)
• recognise missing tag closing brackets (2639868)
• recognise repeated (even spaced) equal signs in front of attributes (a1fa244)
• starting index is not on a quote; attribute is missing opening quote (795d3a8)