html-entities

Fastest HTML entities library.

Comes with both TypeScript and Flow types.

Installation

1$ npm install html-entities

Usage

encode(text, options)

Encodes text replacing HTML special characters (<>&"') and/or other character ranges depending on mode option value.

1import {encode} from 'html-entities';
2
3encode('< > " \' & © ∆');
4// -> '&lt; &gt; &quot; &apos; &amp; © ∆'
5
6encode('< ©', {mode: 'nonAsciiPrintable'});
7// -> '&lt; &copy;'
8
9encode('< ©', {mode: 'nonAsciiPrintable', level: 'xml'});
10// -> '&lt; &#169;'
11
12encode('< > " \' & ©', {mode: 'nonAsciiPrintableOnly', level: 'xml'});
13// -> '< > " \' & &#169;'

Options:

level

• all alias to html5 (default).
• html5 uses HTML5 named references.
• html4 uses HTML4 named references.
• xml uses XML named references.

mode

• specialChars encodes only HTML special characters (default).
• nonAscii encodes HTML special characters and everything outside the ASCII character range.
• nonAsciiPrintable encodes HTML special characters and everything outiside of the ASCII printable characters.
• nonAsciiPrintableOnly everything outiside of the ASCII printable characters keeping HTML special characters intact.
• extensive encodes all non-printable characters, non-ASCII characters and all characters with named references.

numeric

• decimal uses decimal numbers when encoding html entities. i.e. © (default).
• hexadecimal uses hexadecimal numbers when encoding html entities. i.e. ©.

decode(text, options)

Decodes text replacing entities to characters. Unknown entities are left as is.

1import {decode} from 'html-entities';
2
3decode('< > " ' & © ∆');
4// -> '< > " \' & © ∆'
5
6decode('&copy;', {level: 'html5'});
7// -> '©'
8
9decode('&copy;', {level: 'xml'});
10// -> '&copy;'

Options:

level

• all alias to html5 (default).
• html5 uses HTML5 named references.
• html4 uses HTML4 named references.
• xml uses XML named references.

scope

• body emulates behavior of browser when parsing tag bodies: entities without semicolon are also replaced (default).
• attribute emulates behavior of browser when parsing tag attributes: entities without semicolon are replaced when not followed by equality sign =.
• strict ignores entities without semicolon.

decodeEntity(text, options)

Decodes a single HTML entity. Unknown entitiy is left as is.

1import {decodeEntity} from 'html-entities';
2
3decodeEntity('<');
4// -> '<'
5
6decodeEntity('&copy;', {level: 'html5'});
7// -> '©'
8
9decodeEntity('&copy;', {level: 'xml'});
10// -> '&copy;'

Options:

level

• all alias to html5 (default).
• html5 uses HTML5 named references.
• html4 uses HTML4 named references.
• xml uses XML named references.

Performance

Statistically significant comparison with other libraries using benchmark.js. Results by this library are marked with *. The source code of the benchmark is available at benchmark/benchmark.ts.

Common

    Initialization / Load speed

      * #1: html-entities x 2,632,942 ops/sec ±3.71% (72 runs sampled)
        #2: entities x 1,379,154 ops/sec ±5.87% (75 runs sampled)
        #3: he x 1,334,035 ops/sec ±3.14% (83 runs sampled)

HTML5

    Encode test

      * #1: html-entities.encode - html5, nonAscii x 415,806 ops/sec ±0.73% (85 runs sampled)
      * #2: html-entities.encode - html5, nonAsciiPrintable x 401,420 ops/sec ±0.35% (93 runs sampled)
        #3: entities.encodeNonAsciiHTML x 401,235 ops/sec ±0.41% (88 runs sampled)
        #4: entities.encodeHTML x 284,868 ops/sec ±0.45% (93 runs sampled)
      * #5: html-entities.encode - html5, extensive x 237,613 ops/sec ±0.42% (93 runs sampled)
        #6: he.encode x 91,459 ops/sec ±0.50% (84 runs sampled)

    Decode test

        #1: entities.decodeHTMLStrict x 614,920 ops/sec ±0.41% (89 runs sampled)
        #2: entities.decodeHTML x 577,698 ops/sec ±0.44% (90 runs sampled)
      * #3: html-entities.decode - html5, strict x 323,680 ops/sec ±0.39% (92 runs sampled)
      * #4: html-entities.decode - html5, body x 297,548 ops/sec ±0.45% (91 runs sampled)
      * #5: html-entities.decode - html5, attribute x 293,617 ops/sec ±0.37% (94 runs sampled)
        #6: he.decode x 145,383 ops/sec ±0.36% (94 runs sampled)

HTML4

    Encode test

      * #1: html-entities.encode - html4, nonAscii x 379,799 ops/sec ±0.29% (96 runs sampled)
      * #2: html-entities.encode - html4, nonAsciiPrintable x 350,003 ops/sec ±0.42% (92 runs sampled)
      * #3: html-entities.encode - html4, extensive x 169,759 ops/sec ±0.43% (90 runs sampled)

    Decode test

      * #1: html-entities.decode - html4, attribute x 291,048 ops/sec ±0.42% (92 runs sampled)
      * #2: html-entities.decode - html4, strict x 287,110 ops/sec ±0.56% (93 runs sampled)
      * #3: html-entities.decode - html4, body x 285,529 ops/sec ±0.57% (93 runs sampled)

XML

    Encode test

        #1: entities.encodeXML x 418,561 ops/sec ±0.80% (90 runs sampled)
      * #2: html-entities.encode - xml, nonAsciiPrintable x 402,868 ops/sec ±0.30% (89 runs sampled)
      * #3: html-entities.encode - xml, nonAscii x 403,669 ops/sec ±7.87% (83 runs sampled)
      * #4: html-entities.encode - xml, extensive x 237,766 ops/sec ±0.45% (93 runs sampled)

    Decode test

        #1: entities.decodeXML x 888,700 ops/sec ±0.48% (93 runs sampled)
      * #2: html-entities.decode - xml, strict x 353,127 ops/sec ±0.40% (92 runs sampled)
      * #3: html-entities.decode - xml, body x 355,796 ops/sec ±1.58% (86 runs sampled)
      * #4: html-entities.decode - xml, attribute x 369,454 ops/sec ±8.74% (84 runs sampled)

Escaping

    Escape test

        #1: entities.escapeUTF8 x 1,308,013 ops/sec ±0.37% (91 runs sampled)
      * #2: html-entities.encode - xml, specialChars x 1,258,760 ops/sec ±1.00% (93 runs sampled)
        #3: he.escape x 822,569 ops/sec ±0.24% (94 runs sampled)
        #4: entities.escape x 434,243 ops/sec ±0.34% (91 runs sampled)

License

MIT

Security contact information

To report a security vulnerability, please use the Tidelift security contact. Tidelift will coordinate the fix and disclosure.

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