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# Handy tricks
Things and tricks I revisit the most.
### `ngrock`
`ngrock` establish a **ssh** tunnel from a localhost port to a remote url
`$ngrok http --host-header=rewrite PORT`
Happy testing in mobile and any other remote device you want!
### Use browser js module for easiest (p)react demo
**A great cdn:**
**No bundling and shit !!**
`htm`
```markup
htm Demo
```