意外使用“自我”无限制全局变量
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【中文标题】意外使用“自我”无限制全局变量【英文标题】：Unexpected use of 'self' no-restricted-globals 【发布时间】：2019-02-26 02:14:09 【问题描述】：我正在创建一个 React 应用程序。该应用程序运行良好，但是当我包含以下 javascript 文件时，编译失败并且出现以下错误：
编译失败。
./src/recorder.js
第 1 行：'define' 未定义 no-undef
第 1 行：意外使用 'self' no-restricted-globals 第 1 行： 意外使用'self' no-restricted-globals 第 355 行：意外 使用 'self' no-restricted-globals 第 355 行：意外使用 'self' 无限制的全局变量
搜索关键字以了解有关每个错误的更多信息。L
我不太确定可能是什么问题，我已附上此文件的代码。
(function(f)
if (typeof exports === "object" && typeof module !== "undefined")
module.exports = f()
else if (typeof define === "function" && define.amd)
define([], f)
else
var g;
if (typeof window !== "undefined")
g = window
else if (typeof global !== "undefined")
g = global
else if (typeof self !== "undefined")
g = self
else
g = this
g.Recorder = f()
)(function()
var define, module, exports;
return (function e(t, n, r)
function s(o, u)
if (!n[o])
if (!t[o])
var a = typeof require == "function" && require;
if (!u && a) return a(o, !0);
if (i) return i(o, !0);
var f = new Error("Cannot find module '" + o + "'");
throw f.code = "MODULE_NOT_FOUND", f
var l = n[o] =
exports:
;
t[o][0].call(l.exports, function(e)
var n = t[o][1][e];
return s(n ? n : e)
, l, l.exports, e, t, n, r)
return n[o].exports
var i = typeof require == "function" && require;
for (var o = 0; o < r.length; o++) s(r[o]);
return s
)(
1: [function(require, module, exports)
"use strict";
module.exports = require("./recorder").Recorder;
,
"./recorder": 2
],
2: [function(require, module, exports)
'use strict';
var _createClass = (function()
function defineProperties(target, props)
for (var i = 0; i < props.length; i++)
var descriptor = props[i];
descriptor.enumerable = descriptor.enumerable || false;
descriptor.configurable = true;
if ("value" in descriptor) descriptor.writable = true;
Object.defineProperty(target, descriptor.key, descriptor);
return function(Constructor, protoProps, staticProps)
if (protoProps) defineProperties(Constructor.prototype, protoProps);
if (staticProps) defineProperties(Constructor, staticProps);
return Constructor;
;
)();
Object.defineProperty(exports, "__esModule",
value: true
);
exports.Recorder = undefined;
var _inlineWorker = require('inline-worker');
var _inlineWorker2 = _interopRequireDefault(_inlineWorker);
function _interopRequireDefault(obj)
return obj && obj.__esModule ? obj :
default: obj
;
function _classCallCheck(instance, Constructor)
if (!(instance instanceof Constructor))
throw new TypeError("Cannot call a class as a function");
var Recorder = exports.Recorder = (function()
function Recorder(source, cfg)
var _this = this;
_classCallCheck(this, Recorder);
this.config =
bufferLen: 4096,
numChannels: 1,
mimeType: 'audio/wav'
;
this.recording = false;
this.callbacks =
getBuffer: [],
exportWAV: []
;
Object.assign(this.config, cfg);
this.context = source.context;
this.node = (this.context.createScriptProcessor || this.context.createJavaScriptNode).call(this.context, this.config.bufferLen, this.config.numChannels, this.config.numChannels);
this.node.onaudioprocess = function(e)
if (!_this.recording) return;
var buffer = [];
for (var channel = 0; channel < _this.config.numChannels; channel++)
buffer.push(e.inputBuffer.getChannelData(channel));
_this.worker.postMessage(
command: 'record',
buffer: buffer
);
;
source.connect(this.node);
this.node.connect(this.context.destination); //this should not be necessary
var self = ;
this.worker = new _inlineWorker2.default(function()
var recLength = 0,
recBuffers = [],
sampleRate = undefined,
numChannels = undefined;
self.onmessage = function(e)
switch (e.data.command)
case 'init':
init(e.data.config);
break;
case 'record':
record(e.data.buffer);
break;
case 'exportWAV':
exportWAV(e.data.type);
break;
case 'getBuffer':
getBuffer();
break;
case 'clear':
clear();
break;
;
function init(config)
sampleRate = config.sampleRate;
numChannels = config.numChannels;
initBuffers();
function record(inputBuffer)
for (var channel = 0; channel < numChannels; channel++)
recBuffers[channel].push(inputBuffer[channel]);
recLength += inputBuffer[0].length;
function exportWAV(type)
var buffers = [];
for (var channel = 0; channel < numChannels; channel++)
buffers.push(mergeBuffers(recBuffers[channel], recLength));
var interleaved = undefined;
if (numChannels === 2)
interleaved = interleave(buffers[0], buffers[1]);
else
interleaved = buffers[0];
var dataview = encodeWAV(interleaved);
var audioBlob = new Blob([dataview],
type: type
);
self.postMessage(
command: 'exportWAV',
data: audioBlob
);
function getBuffer()
var buffers = [];
for (var channel = 0; channel < numChannels; channel++)
buffers.push(mergeBuffers(recBuffers[channel], recLength));
self.postMessage(
command: 'getBuffer',
data: buffers
);
function clear()
recLength = 0;
recBuffers = [];
initBuffers();
function initBuffers()
for (var channel = 0; channel < numChannels; channel++)
recBuffers[channel] = [];
function mergeBuffers(recBuffers, recLength)
var result = new Float32Array(recLength);
var offset = 0;
for (var i = 0; i < recBuffers.length; i++)
result.set(recBuffers[i], offset);
offset += recBuffers[i].length;
return result;
function interleave(inputL, inputR)
var length = inputL.length + inputR.length;
var result = new Float32Array(length);
var index = 0,
inputIndex = 0;
while (index < length)
result[index++] = inputL[inputIndex];
result[index++] = inputR[inputIndex];
inputIndex++;
return result;
function floatTo16BitPCM(output, offset, input)
for (var i = 0; i < input.length; i++, offset += 2)
var s = Math.max(-1, Math.min(1, input[i]));
output.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true);
function writeString(view, offset, string)
for (var i = 0; i < string.length; i++)
view.setUint8(offset + i, string.charCodeAt(i));
function encodeWAV(samples)
var buffer = new ArrayBuffer(44 + samples.length * 2);
var view = new DataView(buffer);
/* RIFF identifier */
writeString(view, 0, 'RIFF');
/* RIFF chunk length */
view.setUint32(4, 36 + samples.length * 2, true);
/* RIFF type */
writeString(view, 8, 'WAVE');
/* format chunk identifier */
writeString(view, 12, 'fmt ');
/* format chunk length */
view.setUint32(16, 16, true);
/* sample format (raw) */
view.setUint16(20, 1, true);
/* channel count */
view.setUint16(22, numChannels, true);
/* sample rate */
view.setUint32(24, sampleRate, true);
/* byte rate (sample rate * block align) */
view.setUint32(28, sampleRate * 4, true);
/* block align (channel count * bytes per sample) */
view.setUint16(32, numChannels * 2, true);
/* bits per sample */
view.setUint16(34, 16, true);
/* data chunk identifier */
writeString(view, 36, 'data');
/* data chunk length */
view.setUint32(40, samples.length * 2, true);
floatTo16BitPCM(view, 44, samples);
return view;
, self);
this.worker.postMessage(
command: 'init',
config:
sampleRate: this.context.sampleRate,
numChannels: this.config.numChannels
);
this.worker.onmessage = function(e)
var cb = _this.callbacks[e.data.command].pop();
if (typeof cb == 'function')
cb(e.data.data);
;
_createClass(Recorder, [
key: 'record',
value: function record()
this.recording = true;
,
key: 'stop',
value: function stop()
this.recording = false;
,
key: 'clear',
value: function clear()
this.worker.postMessage(
command: 'clear'
);
,
key: 'getBuffer',
value: function getBuffer(cb)
cb = cb || this.config.callback;
if (!cb) throw new Error('Callback not set');
this.callbacks.getBuffer.push(cb);
this.worker.postMessage(
command: 'getBuffer'
);
,
key: 'exportWAV',
value: function exportWAV(cb, mimeType)
mimeType = mimeType || this.config.mimeType;
cb = cb || this.config.callback;
if (!cb) throw new Error('Callback not set');
this.callbacks.exportWAV.push(cb);
this.worker.postMessage(
command: 'exportWAV',
type: mimeType
);
], [
key: 'forceDownload',
value: function forceDownload(blob, filename)
var url = (window.URL || window.webkitURL).createObjectURL(blob);
var link = window.document.createElement('a');
link.href = url;
link.download = filename || 'output.wav';
var click = document.createEvent("Event");
click.initEvent("click", true, true);
link.dispatchEvent(click);
]);
return Recorder;
)();
exports.default = Recorder;
,
"inline-worker": 3
],
3: [function(require, module, exports)
"use strict";
module.exports = require("./inline-worker");
,
"./inline-worker": 4
],
4: [function(require, module, exports)
(function(global)
"use strict";
var _createClass = (function()
function defineProperties(target, props)
for (var key in props)
var prop = props[key];
prop.configurable = true;
if (prop.value) prop.writable = true;
Object.defineProperties(target, props);
return function(Constructor, protoProps, staticProps)
if (protoProps) defineProperties(Constructor.prototype, protoProps);
if (staticProps) defineProperties(Constructor, staticProps);
return Constructor;
;
)();
var _classCallCheck = function(instance, Constructor)
if (!(instance instanceof Constructor))
throw new TypeError("Cannot call a class as a function");
;
var WORKER_ENABLED = !!(global === global.window && global.URL && global.Blob && global.Worker);
var InlineWorker = (function()
function InlineWorker(func, self)
var _this = this;
_classCallCheck(this, InlineWorker);
if (WORKER_ENABLED)
var functionBody = func.toString().trim().match(/^function\s*\w*\s*\([\w\s,]*\)\s*([\w\W]*?)$/)[1];
var url = global.URL.createObjectURL(new global.Blob([functionBody],
type: "text/javascript"
));
return new global.Worker(url);
this.self = self;
this.self.postMessage = function(data)
setTimeout(function()
_this.onmessage(
data: data
);
, 0);
;
setTimeout(function()
func.call(self);
, 0);
_createClass(InlineWorker,
postMessage:
value: function postMessage(data)
var _this = this;
setTimeout(function()
_this.self.onmessage(
data: data
);
, 0);
);
return InlineWorker;
)();
module.exports = InlineWorker;
).call(this, typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : )
, ]
, , [1])(1)
);
【问题讨论】：
尝试删除“使用严格” 这是编译器输出，因此并不意味着易于人类阅读。请改为发布原始源代码。 @LazarNikolic 这是 terrible 的建议......无论如何，正如我所说，这是编译器输出。下次编译项目时，任何更改都会被覆盖。 我已经删除了“使用严格”，但它仍然无法正常工作。 @JaredSmith 对不起，你是什么意思？ 【参考方案1】：当您将create-react-app 与本地 ESLint 版本一起使用时，通常会出现这些 linting 错误。不支持将本地 ESLint 版本与未弹出的 create-react-app 一起使用。
如果您删除本地 ESLint 包并尝试重新编译项目，您应该不会看到这些错误。
// First remove anything related to ESLint from package.json, then:
rm -rf node_modules
rm package-lock.json
npm install
使用create-react-app 设置的项目已经具有带有反应配置的 ESLint，它将进行基本检查 - 没有代码样式检查。 React 官方声明样式格式化程序 Prettier 是用于样式格式化的好工具 (source)。
【讨论】：
删除 eslint 不是解决办法，应该在 eslint 规则中列入白名单 @ShirshenduBhowmick 我不建议删除 ESLint，而是让 CRA 处理 linting，而不是包含两个冲突的版本。以上是关于意外使用“自我”无限制全局变量的主要内容，如果未能解决你的问题，请参考以下文章