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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. | ||
| */ | ||
|
|
||
| import ReactSharedInternals from 'shared/ReactSharedInternals'; | ||
|
|
||
| // 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. | ||
|
|
||
| export function warn(format, ...args) { | ||
| if (__DEV__) { | ||
| printWarning('warn', format, args); | ||
| } | ||
| } | ||
|
|
||
| export function error(format, ...args) { | ||
| if (__DEV__) { | ||
| printWarning('error', format, args); | ||
| } | ||
| } | ||
|
|
||
| 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; | ||
|
|
||
| if (!hasExistingStack) { | ||
| const ReactDebugCurrentFrame = | ||
| ReactSharedInternals.ReactDebugCurrentFrame; | ||
| const stack = ReactDebugCurrentFrame.getStackAddendum(); | ||
| if (stack !== '') { | ||
| format += '%s'; | ||
| args = args.concat([stack]); | ||
| } | ||
| } | ||
|
|
||
| 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); | ||
|
|
||
| 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. | ||
| */ | ||
|
|
||
| // This refers to a WWW module. | ||
| const warningWWW = require('warning'); | ||
|
|
||
| export function warn() { | ||
| // TODO: use different level for "warn". | ||
| const args = Array.prototype.slice.call(arguments); | ||
| args.unshift(false); | ||
| warningWWW.apply(null, args); | ||
| } | ||
|
|
||
| export function error() { | ||
| const args = Array.prototype.slice.call(arguments); | ||
| args.unshift(false); | ||
| warningWWW.apply(null, args); | ||
| } |
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