Files
react-native/Libraries/Utilities/warnOnce.js
T
Eli White e362470305 Convert easy files to flow strict-local
Summary:
This diff was generated by this script used by WWW
https://our.intern.facebook.com/intern/diffusion/WWW/browse/master/scripts/flow/upgrade_to_flow_strict_local.sh?lines=0

Changelog:
[Internal] Upgrade flow to flow strict-local

Reviewed By: zackargyle, rickhanlonii

Differential Revision: D18833630

fbshipit-source-id: e64d4e9a49a0db5e6bf70a0c489567862b578d7f
2019-12-05 16:06:46 -08:00

35 lines
784 B
JavaScript

/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @format
* @flow strict-local
*/
'use strict';
const warning = require('fbjs/lib/warning');
const warnedKeys: {[string]: boolean, ...} = {};
/**
* A simple function that prints a warning message once per session.
*
* @param {string} key - The key used to ensure the message is printed once.
* This should be unique to the callsite.
* @param {string} message - The message to print
*/
function warnOnce(key: string, message: string) {
if (warnedKeys[key]) {
return;
}
warning(false, message);
warnedKeys[key] = true;
}
module.exports = warnOnce;