simple-minify-html

Crates.io	simple-minify-html
lib.rs	simple-minify-html
version
source	src
created_at	2025-02-16 22:43:31.865346+00
updated_at	2025-04-04 19:04:21.444448+00
description	Extremely fast and simple fork of minify-html
homepage	https://github.com/sondr3/simple-minify-html
repository	https://github.com/sondr3/simple-minify-html.git
max_upload_size
id	1558207
Cargo.toml error:	TOML parse error at line 21, column 1 \| 21 \| autolib = false \| ^^^^^^^ unknown field `autolib`, expected one of `name`, `version`, `edition`, `authors`, `description`, `readme`, `license`, `repository`, `homepage`, `documentation`, `build`, `resolver`, `links`, `default-run`, `default_dash_run`, `rust-version`, `rust_dash_version`, `rust_version`, `license-file`, `license_dash_file`, `license_file`, `licenseFile`, `license_capital_file`, `forced-target`, `forced_dash_target`, `autobins`, `autotests`, `autoexamples`, `autobenches`, `publish`, `metadata`, `keywords`, `categories`, `exclude`, `include`
size	0

Sondre Aasemoen (sondr3)

documentation

README

simple-minify-html

[!CAUTION] This is a small fork of wilsonlin's great minify-html, you should probably use that instead.

Changes include, but are not limited to:

No support for other platforms than Rust
Uses OXC for JavaScript minification over minify-js
Does not support templating syntax
Less configuration options
No options that might leave the output not spec compliant

View the changelog to see the latest updates.

Get

[dependencies]
simple-minify-html = "0.17.0"

Use

Check out the docs for API and usage examples.

Features

JavaScript minification

To enable minification of JavaScript, enable the js feature and this will automatically be handled:

[dependencies]
simple-minify-html = { version = "0.17.0", features = ["js"] }

CSS minification

To enable minification of JavaScript, enable the js feature and this will automatically be handled:

[dependencies]
simple-minify-html = { version = "0.17.0", features = ["css"] }

Minification

Spec compliance

WHATWG is the current HTML standard and obsoletes all previous standards. WHATWG lists suggested validators here.

Whitespace

minify-html has advanced context-aware whitespace minification that does things such as:

Leave whitespace untouched in pre and code, which are whitespace sensitive.
Trim and collapse whitespace in content tags, as whitespace is collapsed anyway when rendered.
Remove whitespace in layout tags, which allows the use of inline layouts while keeping formatted code.

Methods

There are three whitespace minification methods. When processing text content, minify-html chooses which ones to use depending on the containing element.

Collapse whitespace

Applies to: any element except whitespace sensitive elements.

Reduce a sequence of whitespace characters in text nodes to a single space (U+0020).

Before	After
`<p>↵ ··The·quick·brown·fox↵ ··jumps·over·the·lazy↵ ··dog.↵ </p>`	`<p>·The·quick·brown·fox·jumps·over·the·lazy·dog.·</p>`

Destroy whole whitespace

Applies to: any element

except whitespace sensitive, content, content-first,

and formatting elements.

Remove any text nodes between tags that only consist of whitespace characters.

Before	After
`<ul>↵ ·· <li>A</li> ↵ ·· <li>B</li> ↵ ·· <li>C</li> ↵ </ul>`	`<ul>↵ ·· <li>A</li> <li>B</li> <li>C</li> ↵ </ul>`

Trim whitespace

Applies to: any element except whitespace sensitive and formatting elements.

Remove any leading/trailing whitespace from any leading/trailing text nodes of a tag.

Before After

Before	After
`<p>↵ ··Hey,·I·<em>just</em>·found↵ ··out·about·this·<strong>cool</strong>·website!↵ ··<sup>[1]</sup>↵ </p>`	`<p>Hey,·I·<em>just</em>·found↵ ··out·about·this·<strong>cool</strong>·website!↵ ··<sup>[1]</sup></p>`

<p>↵
    ··Hey,·I·<em>just</em>·found↵
    ··out·about·this·<strong>cool</strong>·website!↵
    ··<sup>[1]</sup>↵
</p>

<p>Hey,·I·<em>just</em>·found↵
    ··out·about·this·<strong>cool</strong>·website!↵
    ··<sup>[1]</sup></p>

Element types

minify-html assumes HTML and SVG elements are used in specific ways, based on standards and best practices. By making these assumptions, it can apply optimal whitespace minification strategies. If these assumptions do not hold, consider adjusting the HTML source or turning off whitespace minification.

Group	Elements	Expected children
Formatting	`a`, `strong`, and others	Formatting elements, text.
Content	`h1`, `p`, and others	Formatting elements, text.
Layout	`div`, `ul`, and others	Layout elements, content elements.
Content-first	`label`, `li`, and others	Like content but could be layout with only one child.

Formatting elements

Whitespace is collapsed.

Formatting elements are usually inline elements that wrap around part of some text in a content element, so its whitespace isn't trimmed as they're probably part of the content.

Content elements

Whitespace is trimmed and collapsed.

Content elements usually represent a contiguous and complete unit of content such as a paragraph. As such, whitespace is significant but sequences of them are most likely due to formatting.

Before

<p>↵
    ··Hey,·I·<em>just</em>·found↵
    ··out·about·this·<strong>cool</strong>·website!↵
    ··<sup>[1]</sup>↵
</p>

After

<p>Hey,·I·<em>just</em>·found·out·about·this·<strong>cool</strong>·website!·<sup>[1]</sup></p>

Layout elements

Whitespace is trimmed and collapsed. Whole whitespace is removed.

These elements should only contain other elements and no text. This makes it possible to remove whole whitespace, which is useful when using display: inline-block so that whitespace between elements (e.g. indentation) does not alter layout and styling.

Before


<ul>↵
    ··
    <li>A</li>
    ↵
    ··
    <li>B</li>
    ↵
    ··
    <li>C</li>
    ↵
</ul>

After


<ul>
    <li>A</li>
    <li>B</li>
    <li>C</li>
</ul>

Content-first elements

Whitespace is trimmed and collapsed.

These elements are usually like content elements but are occasionally used like a layout element with one child. Whole whitespace is not removed as it might contain content, but this is OK for using as layout as there is only one child and whitespace is trimmed.

Before


<li>↵
    ··
    <article>↵
        ····
        <section></section>
        ↵
        ····
        <section></section>
        ↵
        ··
    </article>
    ↵
</li>

After


<li>
    <article>
        <section></section>
        <section></section>
    </article>
</li>

Attributes

Any entities in attribute values are decoded, and then the shortest representation of the value is calculated and used:

Double quoted, with any " encoded.
Single quoted, with any ' encoded.
Unquoted, with "/' first character (if applicable), any >, and any whitespace encoded.

Attributes have their whitespace (after any decoding) trimmed and collapsed when possible.

Boolean attribute values are removed. Some other attributes are completely removed if their value is empty or the default value after any processing.

type attributes on script tags with a value equaling a JavaScript MIME type are removed.

If an attribute value is empty after any processing, everything but the name is completely removed (i.e. no =), as an empty attribute is implicitly the same as an attribute with an empty string value.

Spaces are removed between attributes when possible.

Entities

Entities are decoded if they're valid and shorter or equal in length when decoded. UTF-8 sequences that have a shorter entity representation are encoded.

Numeric entities that do not refer to a valid Unicode Scalar Value are replaced with the replacement character.

Encoding is avoided when possible; for example, < are only encoded in content if they are followed by a valid tag name character. If necessary, the shortest entity representation is chosen.

Comments

Comments are removed.

Ignored

Bangs, processing instructions, and empty elements are not removed as it is assumed there is a special reason for their declaration.

Parsing

minify-html can process any HTML, handling all possible syntax (including invalid ones) gracefully like browsers. See Parsing.md for more details.

Issues and contributions

Pull requests and any contributions welcome!

If minify-html did something unexpected, misunderstood some syntax, or incorrectly kept/removed some code, raise an issue with some relevant code that can be used to reproduce and investigate the issue.

Commit count: 1166

simple-minify-html

documentation

README

simple-minify-html

Get

Use

Features

JavaScript minification

CSS minification

Minification

Spec compliance

Whitespace

Methods

Element types

Before

After

Before

After

Before

After

Tags

Attributes

Entities

Comments

Ignored

Parsing

Issues and contributions

cargo fmt