How to apply multiple transforms to snippet variable - visual-studio-code

Question

I'm in a file called event-list.tsx, and I'm trying to create a snippet that writes the following code:
const EventList: FC = () => {
return <div>
</div>;
};
export default EventList;
Thus far, in typescriptreact.json I've written the following snippet setting, which results in awkward-looking code (it puts out const event-list rather than const EventList
"react arrow func component": {
"prefix": "rafce",
"body": [
"const ${TM_FILENAME_BASE}: FC = () => {",
" return <div>",
" ",
" </div>;",
"};",
"",
"export default ${TM_FILENAME_BASE};",
""
]
},
I know how to remove the hyphen from the snippet:
${TM_FILENAME_BASE/-//}
I also figured out how to capitalize the first character:
${TM_FILENAME_BASE/(^.)/${1:/upcase}/}
But I can't figure out how to apply all three of the changes I want. I know the regular expression needed to capitalize every character that comes after a hyphen (a positive lookbehind), but I don't know how to apply it here. There is nothing in the documentation chapter implying the possibility to chain multiple transforms onto each other.

Answer 1

Try the following global regex
${TM_FILENAME_BASE/(.)([^-]*)-?/${1:/upcase}${2}/g}
Find a part before a - and Upcase the first letter, repeat for the whole string

Answer 2

"${TM_FILENAME_BASE/(\\w+)-?/${1:/capitalize}/g}",
(\\w+)-? : You only need one capture group if you use /capitalize.
The hyphens are removed by virtue of matching them (-?) but not including them in the output.
The g flag is necessary to keep matching every (\\w+)-? instance and perform a transform for each.
And since you are reusing an earlier transform you can simplify the whole thing like this:
"react arrow func component": {
"prefix": "rafce",
"body": [
"const ${1:${TM_FILENAME_BASE/(\\w*)-?/${1:/capitalize}/g}}: FC = () => {",
" return <div>",
" ",
" </div>;",
"};",
"",
"export default $1;",
""
]
},
Note that
${1:${TM_FILENAME_BASE/(\\w*)-?/${1:/capitalize}/g}}
stores the result of that transform in variable $1 - which can simply be used later (or earlier) by itself to output the same result!