There are two ways to use vue-katex, using the KatexElement component or using the v-katex directive.
Global Options
Options applied globally through the plugin will be merged with any options applied locally to the v-katex directive or KatexElement. Locally applied options have a higher precedence and will override globally applied options, the exception to this is any KaTeX option of the type object or array. These will be merged with the resultant option containing all global and local keys or elements.
Using the katex directive
In your template (don't forget to escape all backslashes):
<divv-katex="'\\frac{a_i}{1+x}'"></div>
To render the math in display mode:
<divv-katex:display="'\\frac{a_i}{1+x}'"></div>
To add KaTeX options, use an object literal instead:
See KaTeX documentation for auto-render for more information.
Using the KatexElement component
<katex-elementexpression="'\\frac{a_i}{1+x}'"/>
Through props KatexElement supports all of the same options that KaTeX supports.
Props
expression
Type:StringRequired
A TeX expression to be displayed.
display-mode
Type:BooleanDefault:false
If true the math will be rendered in display mode, which will put the math in display style (so
\int and
\sum are large, for example), and will center the math on the page on its own line. If false the math will be rendered in inline mode.
throw-on-error
Type:BooleanDefault:false
If true, KaTeX will throw a
ParseError when it encounters an unsupported command or invalid LaTeX. If false, KaTeX will render unsupported commands as text, and render invalid LaTeX as its source code with hover text giving the error, in the color given by
errorColor.
error-color="#CC0000"
Type:StringDefault:#CC0000
A color string given in the format "#XXX" or "#XXXXXX". This option determines the color that unsupported commands and invalid LaTeX are rendered in when throwOnError is set to false.
macros
Type:ObjectDefault:null
A collection of custom macros. Each macro is a property with a name like
\name (written
"\\name" in JavaScript) which maps to a string that describes the expansion of the macro, or a function that accepts an instance of
MacroExpander as first argument and returns the expansion as a string.
MacroExpander is an internal API and subject to non-backwards compatible changes. See
src/macros.js for its usage. Single-character keys can also be included in which case the character will be redefined as the given macro (similar to TeX active characters). This object will be modified if the LaTeX code defines its own macros via
\gdef, which enables consecutive calls to KaTeX to share state.
color-is-text-color
Type:BooleanDefault:false
If true,
\color will work like LaTeX's
\textcolor, and take two arguments (e.g.,
\color{blue}{hello}), which restores the old behavior of KaTeX (pre-0.8.0). If false,
\color will work like LaTeX's
\color, and take one argument (e.g.,
\color{blue}hello). In both cases,
\textcolor works as in LaTeX (e.g.,
\textcolor{blue}{hello}).
max-size="Infinity"
Type:NumberDefault:Infinity
All user-specified sizes, e.g. in
\rule{500em}{500em}, will be capped to
maxSize ems. If set to
Infinity (the default), users can make elements and spaces arbitrarily large.
max-expand="1000"
Type:NumberDefault:1000
Limit the number of macro expansions to the specified number, to prevent e.g. infinite macro loops. If set to
Infinity, the macro expander will try to fully expand as in LaTeX.
Allowed protocols in
\href. Use
_relative to allow relative urls, and
* to allow all protocols.
strict
Type:[Boolean, String, Function]Default:"warn"
If
false or
"ignore", allow features that make writing LaTeX convenient but are not actually supported by (Xe)LaTeX (similar to MathJax). If
true or
"error" (LaTeX faithfulness mode), throw an error for any such transgressions. If
"warn" (the default), warn about such behavior via
console.warn. Provide a custom function
handler(errorCode, errorMsg, token) to customize behavior depending on the type of transgression (summarized by the string code
errorCode and detailed in
errorMsg); this function can also return
"ignore",
"error", or
"warn" to use a built-in behavior. A list of such features and their
errorCode:
"unknownSymbol": Use of unknown Unicode symbol, which will likely also lead to warnings about missing character metrics, and layouts may be incorrect (especially in terms of vertical heights).
"unicodeTextInMathMode": Use of Unicode text characters in math mode.
"mathVsTextUnits": Mismatch of math vs. text commands and units/mode.
"commentAtEnd": Use of % comment without a terminating newline. LaTeX would thereby comment out the end of math mode (e.g. $), causing an error. A second category of errorCodes never throw errors, but their strictness affects the behavior of KaTeX
"newLineInDisplayMode": Use of \ or \newline in display mode (outside an array/tabular environment). In strict mode, no line break results, as in LaTeX.