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| index.d.ts | ||
| index.js | ||
| LICENSE | ||
| package.json | ||
| README.md | ||
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:
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:
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'.