feat: add bfs and dfs for JS and TS

[zhuoqinyue]

If this PR is related to coding or code translation, please read the contribution guideline, fill out the checklist, and paste the console outputs to the PR.

• I've tested the code and ensured the outputs are the same as the outputs of reference codes.
• I've checked the codes (formatting, comments, indentation, file header, etc) carefully.
• The code does not rely on a particular environment or IDE and can be executed on a standard system (Win, macOS, Ubuntu).

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

1 Ignored Deployment

Name	Status	Preview	Comments	Updated
hello-algo	⬜️ Ignored (Inspect)			Feb 24, 2023 at 5:10PM (UTC)

[zhuoqinyue]

hey, K sir. It seems that you foget to check this PR? @krahets

[krahets]

The PR related to JS and TS is to be reviewed by @justin-tse.

[zhuoqinyue]

OK.

[justin-tse]

@zhuoqinyue Thank you for the clean code.

1. We are used to adding a blank line in the final.
2. In TypeScript, most of the time, less is better, we can use Type inference automatically.

[zhuoqinyue]

I've updated it.
But what I'm confused about is why not type constraints on variables in TS.
Are you worried that there will be some null or other types here? @justin-tse

[krahets]

Hi @zhuoqinyue ! Could you unify the format of the functions in this PR to

function hashingSearchLinkedList(map: Map<number, ListNode>, target: number): ListNode | null {
...

Now the codes are copied and pasted automatically to the docs based on the recognition by the regular expressions, so we're wondering about a consistent naming style for all the functions and classes.

[zhuoqinyue]

OK.
Use function declarations instead of function expressions.