\framebox - LaTeX text command

\framebox{x+y}

Renderer support

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

Syntax#

\frameboxo:L[1em]optional dimensiono:N[\cs]optional control sequencem:T{a}text content

Argspec o:L o:N m:T — two optional and one mandatory argument. Reading argspecs

\framebox[100pt]{x+y}

\framebox[100pt][c]{x+y}

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

\fbox{#1}approximate
\fbox does not take optional arguments for width and alignment
\boxed{#1}exact
\boxed is typically for math mode, while \framebox acts more like \text but can parse math internally.

`base`
Input	Case	MathJax	KaTeX	XeTeX
`\framebox{a}`	Positive · baseline	Pass	Fail	Pass
`\framebox[1pt]{b}`	Positive · vary:o[0]	Pass	Fail	Pass
`\framebox[a]{b}`	Positive · vary:o[1]	Pass	Fail	Fail
`\framebox[1pt][b]{c}`	Positive · maximal	Pass	Fail	Pass
`\framebox a`	Positive · bare[2]	Pass	Fail	Pass
`\framebox[a]{a}`	Negative · neg:L[0]	Pass	Fail	Fail
`\framebox[\alpha]{a}`	Negative · neg:N[1]	Pass	Fail	Fail
`\framebox{a^2}`	Negative · neg:T[2]	Pass	Fail	Fail