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- # entities [](https://npmjs.org/package/entities) [](https://npmjs.org/package/entities) [](https://github.com/fb55/entities/actions/workflows/nodejs-test.yml)
- Encode & decode HTML & XML entities with ease & speed.
- ## Features
- - 😇 Tried and true: `entities` is used by many popular libraries; eg.
- [`htmlparser2`](https://github.com/fb55/htmlparser2), the official
- [AWS SDK](https://github.com/aws/aws-sdk-js-v3) and
- [`commonmark`](https://github.com/commonmark/commonmark.js) use it to
- process HTML entities.
- - ⚡️ Fast: `entities` is the fastest library for decoding HTML entities (as
- of April 2022); see [performance](#performance).
- - 🎛 Configurable: Get an output tailored for your needs. You are fine with
- UTF8? That'll save you some bytes. Prefer to only have ASCII characters? We
- can do that as well!
- ## How to…
- ### …install `entities`
- npm install entities
- ### …use `entities`
- ```javascript
- const entities = require("entities");
- // Encoding
- entities.escapeUTF8("& ü"); // "& ü"
- entities.encodeXML("& ü"); // "& ü"
- entities.encodeHTML("& ü"); // "& ü"
- // Decoding
- entities.decodeXML("asdf & ÿ ü '"); // "asdf & ÿ ü '"
- entities.decodeHTML("asdf & ÿ ü '"); // "asdf & ÿ ü '"
- ```
- ## Performance
- This is how `entities` compares to other libraries on a very basic benchmark
- (see `scripts/benchmark.ts`, for 10,000,000 iterations; **lower is better**):
- | Library | Version | `decode` perf | `encode` perf | `escape` perf |
- | -------------- | ------- | ------------- | ------------- | ------------- |
- | entities | `3.0.1` | 1.418s | 6.786s | 2.196s |
- | html-entities | `2.3.2` | 2.530s | 6.829s | 2.415s |
- | he | `1.2.0` | 5.800s | 24.237s | 3.624s |
- | parse-entities | `3.0.0` | 9.660s | N/A | N/A |
- ---
- ## FAQ
- > What methods should I actually use to encode my documents?
- If your target supports UTF-8, the `escapeUTF8` method is going to be your best
- choice. Otherwise, use either `encodeHTML` or `encodeXML` based on whether
- you're dealing with an HTML or an XML document.
- You can have a look at the options for the `encode` and `decode` methods to see
- everything you can configure.
- > When should I use strict decoding?
- When strict decoding, entities not terminated with a semicolon will be ignored.
- This is helpful for decoding entities in legacy environments.
- > Why should I use `entities` instead of alternative modules?
- As of April 2022, `entities` is a bit faster than other modules. Still, this is
- not a very differentiated space and other modules can catch up.
- **More importantly**, you might already have `entities` in your dependency graph
- (as a dependency of eg. `cheerio`, or `htmlparser2`), and including it directly
- might not even increase your bundle size. The same is true for other entity
- libraries, so have a look through your `node_modules` directory!
- > Does `entities` support tree shaking?
- Yes! `entities` ships as both a CommonJS and a ES module. Note that for best
- results, you should not use the `encode` and `decode` functions, as they wrap
- around a number of other functions, all of which will remain in the bundle.
- Instead, use the functions that you need directly.
- ---
- ## Acknowledgements
- This library wouldn't be possible without the work of these individuals. Thanks
- to
- - [@mathiasbynens](https://github.com/mathiasbynens) for his explanations
- about character encodings, and his library `he`, which was one of the
- inspirations for `entities`
- - [@inikulin](https://github.com/inikulin) for his work on optimized tries for
- decoding HTML entities for the `parse5` project
- - [@mdevils](https://github.com/mdevils) for taking on the challenge of
- producing a quick entity library with his `html-entities` library.
- `entities` would be quite a bit slower if there wasn't any competition.
- Right now `entities` is on top, but we'll see how long that lasts!
- ---
- License: BSD-2-Clause
- ## Security contact information
- To report a security vulnerability, please use the
- [Tidelift security contact](https://tidelift.com/security). Tidelift will
- coordinate the fix and disclosure.
- ## `entities` for enterprise
- Available as part of the Tidelift Subscription
- The maintainers of `entities` and thousands of other packages are working with
- Tidelift to deliver commercial support and maintenance for the open source
- dependencies you use to build your applications. Save time, reduce risk, and
- improve code health, while paying the maintainers of the exact dependencies you
- use.
- [Learn more.](https://tidelift.com/subscription/pkg/npm-entities?utm_source=npm-entities&utm_medium=referral&utm_campaign=enterprise&utm_term=repo)
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