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Replace console.warn/error with a custom wrapper at build time
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,63 @@ | ||
/** | ||
* 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. | ||
*/ | ||
|
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import ReactSharedInternals from 'shared/ReactSharedInternals'; | ||
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// In DEV, calls to console.warn and console.error get replaced | ||
// by calls to these methods by a Babel plugin. | ||
// | ||
// In PROD (or in packages without access to React internals), | ||
// they are left as they are instead. | ||
|
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export function warn(format, ...args) { | ||
if (__DEV__) { | ||
printWarning('warn', format, args); | ||
} | ||
} | ||
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export function error(format, ...args) { | ||
if (__DEV__) { | ||
printWarning('error', format, args); | ||
} | ||
} | ||
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function printWarning(level, format, args) { | ||
if (__DEV__) { | ||
const hasExistingStack = | ||
args.length > 0 && | ||
typeof args[args.length - 1] === 'string' && | ||
args[args.length - 1].indexOf('\n in') === 0; | ||
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if (!hasExistingStack) { | ||
const ReactDebugCurrentFrame = | ||
ReactSharedInternals.ReactDebugCurrentFrame; | ||
const stack = ReactDebugCurrentFrame.getStackAddendum(); | ||
if (stack !== '') { | ||
format += '%s'; | ||
args = args.concat([stack]); | ||
} | ||
} | ||
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const argsWithFormat = args.map(item => '' + item); | ||
// Careful: RN currently depends on this prefix | ||
argsWithFormat.unshift('Warning: ' + format); | ||
// We intentionally don't use spread (or .apply) directly because it | ||
// breaks IE9: https://github.com/facebook/react/issues/13610 | ||
// eslint-disable-next-line react-internal/no-production-logging | ||
Function.prototype.apply.call(console[level], console, argsWithFormat); | ||
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try { | ||
// --- Welcome to debugging React --- | ||
// This error was thrown as a convenience so that you can use this stack | ||
// to find the callsite that caused this warning to fire. | ||
let argIndex = 0; | ||
const message = | ||
'Warning: ' + format.replace(/%s/g, () => args[argIndex++]); | ||
throw new Error(message); | ||
} catch (x) {} | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,22 @@ | ||
/** | ||
* 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. | ||
*/ | ||
|
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// This refers to a WWW module. | ||
const warningWWW = require('warning'); | ||
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export function warn() { | ||
// TODO: use different level for "warn". | ||
const args = Array.prototype.slice.call(arguments); | ||
args.unshift(false); | ||
warningWWW.apply(null, args); | ||
} | ||
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export function error() { | ||
const args = Array.prototype.slice.call(arguments); | ||
args.unshift(false); | ||
warningWWW.apply(null, args); | ||
} |
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packages/shared/forks/lowPriorityWarningWithoutStack.www.js
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