cosmos-explorer/public/datafeeds/udf/README.md

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2021-11-21 01:42:01 +00:00
# UDF Compatible Datafeed
This folder contains [UDF](https://github.com/tradingview/charting_library/wiki/UDF) datafeed adapter. It implements [JS API](https://github.com/tradingview/charting_library/wiki/JS%20API) and makes HTTP requests using [UDF](https://github.com/tradingview/charting_library/wiki/UDF) protocol.
You can use this datafeed adapter to plug your data if you implement [UDF](https://github.com/tradingview/charting_library/wiki/UDF) on your server. You can also scrutinize how it works before writing your own adapter.
This datafeed is implemented in [TypeScript](https://github.com/Microsoft/TypeScript/).
## Folders content
- `./src` folder contains the source code in TypeScript.
- `./lib` folder contains transpiled in es5 code. So, if you do not know how to use TypeScript - you can modify these files to change the result bundle later.
- `./dist` folder contains bundled JavaScript files which can be inlined into a page and used in the Widget Constructor.
## Build & bundle
Before building or bundling your code you need to run `npm install` to install dependencies.
`package.json` contains some handy scripts to build or generate the bundle:
- `npm run compile` to compile TypeScript source code into JavaScript files (output will be in `./lib` folder)
- `npm run bundle-js` to bundle multiple JavaScript files into one bundle (it also bundle polyfills)
- `npm run build` to compile and bundle (it is a combination of all above commands)
NOTE: if you want to minify the bundle code, you need to set `ENV` environment variable to a value different from `development`.
For example:
```bash
export ENV=prod
npm run bundle-js # or npm run build
```
or
```bash
ENV=prod npm run bundle-js
```
or
```bash
ENV=prod npm run build
```