\Rule - LaTeX layout command

\Rule{1em} 2pt {3pt}

Renderer support

Package	MathJax	KaTeX	XeTeX
`base`	MathJax: Full	KaTeX: None	XeTeX: None
`textmacros`	MathJax: Full	KaTeX: None	XeTeX: None

Syntax#

\Rulem:L{1em}dimensionm:L{1em}dimensionm:L{1em}dimension

Argspec m:L m:L m:L — three mandatory arguments. Same argspec in base and textmacros. Reading argspecs

textmacros

\text{\Rule{1em}{.5em}{.25em}}

textmacros

\text{\Rule 1em .5em .25em}

Package	Signature	Allowed mode	Notes
`base`	`m:L m:L m:L`	math	Used to insert a solid rectangular rule with explicit width, height, and depth in mathematical material.
`textmacros`	`m:L m:L m:L`	text	Used to insert a solid rectangular rule with explicit width, height, and depth in text fragments or legacy MathJax TeX input.

TeXForm parses this entry as prefix syntax; the package determines its argument specification.

`base`
Input	Case	MathJax	KaTeX	XeTeX
`\Rule{1pt}{1pt}{1pt}`	Positive · baseline	Pass	Fail	Fail
`\Rule 1pt{1pt}{1pt}`	Positive · bare[0]	Pass	Fail	Fail
`\Rule{1pt}1pt{1pt}`	Positive · bare[1]	Pass	Fail	Fail
`\Rule{1pt}{1pt}1pt`	Positive · bare[2]	Pass	Fail	Fail
`\Rule{a}{1pt}{1pt}`	Negative · neg:L[0]	Fail	Fail	Fail
`\Rule{1pt}{a}{1pt}`	Negative · neg:L[1]	Fail	Fail	Fail
`\Rule{1pt}{1pt}{a}`	Negative · neg:L[2]	Fail	Fail	Fail

`textmacros`
Input	Case	MathJax	KaTeX	XeTeX
`\Rule{1pt}{1pt}{1pt}`	Positive · baseline	Pass	Fail	Fail
`\Rule 1pt{1pt}{1pt}`	Positive · bare[0]	Pass	Fail	Fail
`\Rule{1pt}1pt{1pt}`	Positive · bare[1]	Pass	Fail	Fail
`\Rule{1pt}{1pt}1pt`	Positive · bare[2]	Pass	Fail	Fail
`\Rule{a}{1pt}{1pt}`	Negative · neg:L[0]	Fail	Fail	Fail
`\Rule{1pt}{a}{1pt}`	Negative · neg:L[1]	Fail	Fail	Fail
`\Rule{1pt}{1pt}{a}`	Negative · neg:L[2]	Fail	Fail	Fail