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参考链接：/eslint/eslint
一、ESLint跟JSLint和JSHint类似，但有以下区别：
1.使用Espree进行js解析(parse)
2.用AST抽象语法树去识别(evaluate)代码中的模式
3.每个规则都是独立的插件
全局安装：
npm install -g eslint
如果是第一次使用，eslint --init 命令帮你完成初始化，生成.eslintrc文件
然后eslint test.js test2.js
"rules": {
"semi": ["error", "always"],
"quotes": ["error", "double"]
提示有三个level：
"off"&or&0&- 关闭这个规则校验
"warn"&or&1&- 开启这个规则校验，但只是提醒，不会退出
"error"&or&2&-&开启这个规则校验，并退出
五、常见问题
1.为什么不用jslint
创建eslint是因为急需插件化的校验工具
2.ESLint跟JSHint、JSCS的比较
ESLint比JSlint要慢2~3倍，因为ESLint在识别代码前需要用Espress构建AST,而JSHint在解析的时候就会识别代码。虽然慢些，但不至于成为痛点。
ESLint比JSCS快，（as ESLint uses a single-pass traversal for analysis whereas JSCS using a querying model.）
3.ESLint仅仅是校验还是也检查代码风格
都有。ESLint does both traditional linting (looking for problematic patterns) and style checking (enforcement of conventions). You can use it for both.
4.支持es6吗？
支持。参考配置http://eslint.org/docs/user-guide/configuring
5.支持JSX？
支持，但并不表示支持React。（Yes, ESLint natively supports parsing JSX syntax (this must be enabled in&.). Please note that supporting JSX syntax&is not&the same as supporting React. React applies specific semantics to JSX syntax that ESLint doesn't recognize. We recommend using&&if you are using React and want React semantics.）
5.支持es7吗？
本身不支持，可以使用babel-eslint
六、下面详细介绍下配置，地址http://eslint.org/docs/user-guide/configuring
1.配置ESLint
主要有两种方法配置
（1）配置注释，直接嵌入到js文件中
（2）配置文件，使用js、json或者yaml文件来为整个目录及其子目录配置。形式有：.eslintrc.*文件，或者在package.json中配置eslintConfig字段，或者在命令行里配置。
配置分几个方面：
（1）环境（env）：设置你的脚本的目标运行环境，如browser，amd，es6，commonjs等，每种环境有预设的全局变量
（2）全局变量：增加的全局变量供运行时使用
（3）规则（rules）：设定的规则及该规则对应的报错level
2.配置解析器选项（Specifying Parser Options）
默认仅支持ES5语法，可以设置为es6 es7 jsx等。
"parserOptions": {
"ecmaVersion": 6,
// 可选 3 5（默认） 6 7
"sourceType": "module", // 可选script（默认） module
"ecmaFeatures": {
"jsx": true
"rules": {
3.配置解析器（Specifying Parser），需要本地npm模块
"parser": "esprima", // Espree(默认) Esprima Babel-ESLint
"rules": { "semi": "error" } }
4.配置环境（Specifying Environments），可以多选
browser - browser global variables.
node - Node.js global variables and Node.js scoping.
commonjs - CommonJS global variables and CommonJS scoping (use this for browser-only code that uses Browserify/WebPack).
shared-node-browser - Globals common to both Node and Browser.
es6 - enable all ECMAScript 6 features except for modules.
worker - web workers global variables.
amd - defines require() and define() as global variables as per the amd spec.
mocha - adds all of the Mocha testing global variables.
jasmine - adds all of the Jasmine testing global variables for version 1.3 and 2.0.
jest - Jest global variables.
phantomjs - PhantomJS global variables.
protractor - Protractor global variables.
qunit - QUnit global variables.
jquery - jQuery global variables.
prototypejs - Prototype.js global variables.
shelljs - ShellJS global variables.
meteor - Meteor global variables.
mongo - MongoDB global variables.
applescript - AppleScript global variables.
nashorn - Java 8 Nashorn global variables.
serviceworker - Service Worker global variables.
atomtest - Atom test helper globals.
embertest - Ember test helper globals.
webextensions - WebExtensions globals.
greasemonkey - GreaseMonkey globals.
如果要在待校验文件里面配置可以这样配置：
/*eslint-env node, mocha */
如果要在配置文件中配置：
"browser": true,
"node": true
如果在package.json中配置：
"name": "mypackage",
"version": "0.0.1",
"eslintConfig": {
"browser": true,
"node": true
如果在YAML中配置：
browser: true
node: true
也可以用插件
"plugins": ["example"],
"example/custom": true
5.配置全局变量（Specifying Globals）
&定义了全局变量以后，使用他们，ESLint不会发出警告。
在js文件中定义：
&/*global var1, var2*/&
设置read only
&/*global var1:false, var2:false*/&
在配置文件中：
"globals": {
"var1": true,
"var2": false
6.配置插件（Configuring Plugins）
使用npm安装第三方插件
"plugins": [
"plugin1",
"eslint-plugin-plugin2"
7.配置规则（Configuring Rules）
js中配置：
&/*eslint eqeqeq: "off", curly: "error"*/&
&/*eslint eqeqeq: 0, curly: 2*/&
如果规则有多个选项：
&/*eslint quotes: ["error", "double"], curly: 2*/&
在配置文件中设置：
"rules": {
"eqeqeq": "off",
"curly": "error",
"quotes": ["error", "double"]
使用插件：
"plugins": [
"rules": {
"eqeqeq": "off",
"curly": "error",
"quotes": ["error", "double"],
"plugin1/rule1": "error"
&/*eslint "plugin1/rule1": "error" */&
临时关闭eslint校验：
/*eslint-disable */
//Disable all rules between comments
alert('foo');
/*eslint-enable */
/*eslint-disable no-alert, no-console */
alert('foo');
console.log('bar');
/*eslint-enable no-alert */
在js特定行关闭校验：
alert('foo'); // eslint-disable-line
// eslint-disable-next-line
alert('foo');
alert('foo'); // eslint-disable-line no-alert, quotes, semi
// eslint-disable-next-line no-alert, quotes, semi
alert('foo');
8.增加共享设置（Adding Shared Settings）
"settings": {
"sharedData": "Hello"
9.使用配置文件
eslint -c myconfig.json myfiletotest.js
10.继承配置文件（Extending Configuration Files）
"extends": [
"./node_modules/coding-standard/eslintDefaults.js",
// Override eslintDefaults.js
"./node_modules/coding-standard/.eslintrc-es6",
// Override .eslintrc-es6
"./node_modules/coding-standard/.eslintrc-jsx",
"rules": {
// Override any settings from the "parent" configuration
"eqeqeq": "warn"
11.忽略文件或目录(Ignoring Files and Directories)
建立.eslintignore文件
# /node_modules and /bower_components ignored by default
# Ignore files compiled from TypeScript and CoffeeScript
**/*.{ts,coffee}.js
# Ignore built files except build/index.js
!build/index.js
阅读(...) 评论()How to Pass the 154 ESL Test | eHow
Teachers in Texas can become highly qualified to teach different subject areas by passing state content exams. Exam 154 ESL is the supplemental English as a Second Language exam. Passing this exam provides evidence that the teacher knows the basics of teaching students whose primary language is not English. The test covers three domains: language concepts and acquisition, instruction and assessment and the foundations of ESL education including cultural awareness and family and community involvement. To prepare for this exam, teachers should review printed and online study guides, take practice tests, and attend a test review session if one is available.
Review the Texas Examinations of Education Standards (TExES) preparation manual. This study guide is available online at the TExES Web site (www.texes.ets.org). It includes detailed information about the domains, competencies and standards covered on the exam. This information is what every beginning educator should know when teaching ESL students. The preparation manual also provides tips for studying for the exam, details on how the exam is formatted and practice test items.
Use a printed study guide to learn more specifics about the content of the exam. The state preparation manual provides descriptive statements about the domains and competencies on the exam. Some printed study guides will provide more specific information about these concepts. For example, the TExES preparation manual notes the importance of knowing language concepts and how language is acquired.
A third-party study guide might provide a more detailed review of language development stages and how to teach students at different stages. Before purchasing a printed study guide, read reviews and recommendations from people who have purchased and used these guides.
Take a practice exam. Sample exam questions are available in both the TExES preparation manual and in most printed study guides. You can also find sample exam questions online. Most resources provide an answer key that includes the reasoning behind the correct and incorrect answers.
Attend a test review session. Private test preparation centers provide review sessions for state certification exams. These review sessions are often available for a fee and are taught by professional educators.
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请问读【ESL】有用吗？收藏
我过几天开课了
你在哪里读啊
我的英语带广东话口音，怎么破？
还是那句话自己不努力度什么都没用～
都是最基础的英语 如果你0基础 还是有用的初中以上水平感觉没啥用还有就是 不用功啥都没用
还好、打基础，尽量在大学以前pass esl 不然之后你还的交钱学
读中国人开的语言学校，全班都说中文，就完全没用。我英语在这边ESL学出来，尤其是读写，语法
楼主住在八大道附近吗
有空可否交流一下
English is second language
先练好普通话，普通话说的好，其他语言发音都会好
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听说没用。读写有点帮助
还是有用的除非ESL等级太低
感觉不出来 我是到了高三才到能买一杯咖啡的程度 初3来的 从8年级下学期到12年级 最好到无中文的地方 瞅瞅我一同学 和我差不多时间来 到现在自我介绍都做不到
看你本身啥水平了
年龄越小其实越好学。。
English is second language
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为兴趣而生，贴吧更懂你。或Will I Pass my ESL, TEFL, TESL Course?
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