@qyazhang Thank you for contribution, would you mind to fix the CI failure first?

Thanks, I will fix it later (I'm sorry that I'm not so familiar with Typescript and this testing tool)

Actually, I prefer creating an issue before sending out the PR.

In the issue, we can discuss the implementation first. Also this could be a chance to get feedback from the community.

I'm sorry I may need further time to solve the problem of "vsce package", I will close it and issue/PR again. Sorry for troubling

@qyazhang Don't worry, it's fine.

What kind of problem are you meeting with. I'm willing to help if I can.

Thanks for your kind.
I searched the error message and few solutions are found. I will try to debug it these days to find which changes lead to this error (the error message didn't indicate which parts lead to this error), if faced the same error again, I will try to solve it with you.

@qyazhang What error message were you get?

It show the error message like this

Executing prepublish script 'npm run vscode:prepublish'...
ERROR Command failed: npm run vscode:prepublish
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! vscode-leetcode@0.10.2 compile: tsc -p ./
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the vscode-leetcode@0.10.2 compile script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/zhang/.npm/_logs/2019-02-25T03_23_53_058Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! vscode-leetcode@0.10.2 vscode:prepublish: npm run compile
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the vscode-leetcode@0.10.2 vscode:prepublish script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/zhang/.npm/_logs/2019-02-25T03_23_53_083Z-debug.log

And the details in log is shown like this

0 info it worked if it ends with ok
1 verbose cli [ '/usr/local/bin/node', '/usr/local/bin/npm', 'run', 'compile' ]
2 info using npm@6.8.0
3 info using node@v10.13.0
4 verbose run-script [ 'precompile', 'compile', 'postcompile' ]
5 info lifecycle vscode-leetcode@0.10.2(削除) precompile: vscode-leetcode@0.10.2
6 info lifecycle vscode-leetcode@0.10.2 (削除ここまで)compile: vscode-leetcode@0.10.2
7 verbose lifecycle vscode-leetcode@0.10.2(削除) compile: unsafe-perm in lifecycle true
8 verbose lifecycle vscode-leetcode@0.10.2 (削除ここまで)compile: PATH: /usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/Users/zhang/git/vscode-leetcode/node_modules/.bin:/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/Users/zhang/git/vscode-leetcode/node_modules/.bin:/Users/zhang/perl5/bin:/usr/local/bin:/opt/local/bin:/opt/local/sbin:/opt/local/bin:/opt/local/sbin:/usr/local/git/bin:/usr/local/sbin:/usr/local/git/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/zhang/.rvm/bin:/Users/zhang/.rvm/bin
9 verbose lifecycle vscode-leetcode@0.10.2(削除) compile: CWD: /Users/zhang/git/vscode-leetcode
10 silly lifecycle vscode-leetcode@0.10.2 (削除ここまで)compile: Args: [ '-c', 'tsc -p ./' ]
11 silly lifecycle vscode-leetcode@0.10.2(削除) compile: Returned: code: 2 signal: null
12 info lifecycle vscode-leetcode@0.10.2 (削除ここまで)compile: Failed to exec compile script
13 verbose stack Error: vscode-leetcode@0.10.2 compile: tsc -p ./
13 verbose stack Exit status 2
13 verbose stack at EventEmitter. (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:301:16)
13 verbose stack at EventEmitter.emit (events.js:182:13)
13 verbose stack at ChildProcess. (/usr/local/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
13 verbose stack at ChildProcess.emit (events.js:182:13)
13 verbose stack at maybeClose (internal/child_process.js:962:16)
13 verbose stack at Process.ChildProcess._handle.onexit (internal/child_process.js:251:5)
14 verbose pkgid vscode-leetcode@0.10.2
15 verbose cwd /Users/zhang/git/vscode-leetcode
16 verbose Darwin 17.7.0
17 verbose argv "/usr/local/bin/node" "/usr/local/bin/npm" "run" "compile"
18 verbose node v10.13.0
19 verbose npm v6.8.0
20 error code ELIFECYCLE
21 error errno 2
22 error vscode-leetcode@0.10.2 compile: tsc -p ./
22 error Exit status 2
23 error Failed at the vscode-leetcode@0.10.2 compile script.
23 error This is probably not a problem with npm. There is likely additional logging output above.
24 verbose exit [ 2, true ]

(I'm sorry I'm busy at other things and didn't get further developement)