About the configuatio of katex

It seems that katex not support equation environment, and the solution given [here](https://github.com/KaTeX/KaTeX/issues/445#issuecomment-406404563) not work for markdown-preview when I set it as:
```
let g:mkdp_preview_options = {
\ 'katex': {
\ delimiters: [
\ {left: "$$", right: "$$", display: true},
\ {left: "\\(", right: "\\)", display: false},
\ {left: "\\[", right: "\\]", display: true},
\ {left: "\\begin{equation}", right: "\\end{equation}", display: true}
\ ]
}
```
I guess the only option support is given in the doc of katex: https://katex.org/docs/options.html. But did there any way to use the `delimiters` as an option?