create-expo-cljs-app
Version:
Create a react native application with Expo and Shadow-CLJS!
28 lines (16 loc) • 677 B
Markdown
# warn-once
Print a warning exactly once during development. Suitable for deprecation warnings, warnings for missing setup etc.
## Installation
Open a Terminal in the project root and run:
```sh
npm install warn-once
```
## Usage
The `warnOnce` function accepts a condition as the first argument. If the condition is `true`, then it'll print a warning:
```js
const warnOnce = require('warn-once');
// ...
warnOnce(someCondition, 'This is a warning message');
```
You can call `warnOnce` multiple times, but if the warning was printed already, it'll not be printed again.
The warning is only shown during development, i.e. if `NODE_ENV` is not set to `'production'`.