JSLint简介与插件安装

JSLint简介

　　JavaScript 作为一门语法灵活多变且对格式要求相对松散的语言，代码格式的混乱和某些语言特性的不正确使用，往往使得最终交付的产品中包含许多因编码风格约定造成的未预见的行为或错误，这种习惯性的问题如果不及时指出并修改，往往会在项目的迭代过程中不断的重现，严重影响 Web 产品的稳定性与安全性。

　　JSLint 正是 Douglas Crockford 为解决此类问题创建的工具，JSLint 除了能指出这些不合理的约定，还能标出结构方面的问题。虽然 JSLint 不能保证代码逻辑一定正确，但却有助于发现错误并教会开发人员一些好的编码实践。值得一提的是 JSLint 工具本身也是一段 JavaScript 代码，它是检验 JavaScript 代码质量的 JavaScript 脚本。

　　JSLint 对 JavaScript 脚本的质量检测主要包括以下几个方面：

• 检测语法错误：例如大括号“{}”的配对错误。
• 变量定义规范：例如未定义变量的检测。
• 代码格式规范：例如句末分号的缺失。
• 蹩脚语言特性的使用检测：如 eval 和 with 的使用限制。

　　目前，与 JSLint 功能类似的 JavaScript 代码检测工具有很多，包括：YUI Test、Firebug、MS Script Debugger 、CompanionJS 等等，它们中大多数都是以浏览器插件的形式存在于客户端浏览器进行 JavaScript 运行时的检测和调试，JSLint 与这些工具的重要区别在于其更加注重静态代码格式的检测，而这也正是当前火热的敏捷开发中持续构建所需要和提倡的。

Eclipse安装JSLint插件的几种方法

 

　　

　　方法一：

Step One: Open Eclipse up on your machine and go to ‘Help’ -> ‘Install New Software’ Step Two: Click ‘add’ and to stuff the location with the following link:

 

https://svn.codespot.com/a/eclipselabs.org/mobile-web-development-with-phonegap/tags/jslint4java1/download then click ‘ok’. Step Three: Selecting ‘Javascript Development Tools’ and ‘jslint4java’ and click next.

 

　　方法二：

Step One: Download jslint4java Step Two: Put jslint4java.jar somewhere Step Three: Add an external tool configuration in Eclipse: Location: /usr/bin/java(or your path to javaw.exe) Arguments: -jar E:/java_tools/jsLint4/jslint4java-2.0.3/jslint4java-2.0.3.jar ${resource_loc} --debug --warnings

 http://code.google.com/p/jslint4java/ jslint4java.jar and source

 Usage: jslint4java [options] file.js ...
  Options:
        --anon
       If the space may be omitted in anonymous function declarations
        --bitwise
       If bitwise operators should be allowed
        --browser
       If the standard browser globals should be predefined
        --continue
       If the continuation statement should be tolerated
        --css
       If css workarounds should be tolerated
        --debug
       If debugger statements should be allowed
        --devel
       If logging should be allowed (console, alert, etc.)
        --encoding
       Specify the input encoding
        --eqeq
       If == should be allowed
        --es5
       If es5 syntax should be allowed
        --evil
       If eval should be allowed
        --forin
       If for in statements need not filter
        --fragment
       If html fragments should be allowed
        --help
       Display usage information
       Default: false
        --indent
       The indentation factor
        --jslint
       Specify an alternative version of jslint.js
        --maxerr
       The maximum number of errors to allow
        --maxlen
       The maximum length of a source line
        --newcap
       If constructor names capitalization is ignored
        --node
       If node.js globals should be predefined
        --nomen
       If names may have dangling _
        --on
       If html event handlers should be allowed
        --passfail
       If the scan should stop on first error
        --plusplus
       If increment/decrement should be allowed
        --predef
       The names of predefined global variables
        --properties
       If all property names must be declared with /*properties*/
        --regexp
       If the . should be allowed in regexp literals
        --report
       Display report in different formats: plain, xml, junit, checkstyle and
       report
        --rhino
       If the rhino environment globals should be predefined
        --sloppy
       If the 'use strict'; pragma is optional
        --stupid
       If really stupid practices are tolerated
        --sub
       If all forms of subscript notation are tolerated
        --timeout
       Maximum number of seconds JSLint can run for
       Default: 0
        --todo
       If todo comments are tolerated
        --undef
       If variables can be declared out of order
        --unparam
       If unused parameters should be tolerated
        --vars
       If multiple var statements per function should be allowed
        --version
       Show the version of JSLint in use.
       Default: false
        --warnings
       Enable additional warnings (jslint4java)
        --white
       If sloppy whitespace is tolerated
        --windows
       If ms windows-specific globals should be predefined

using jslint version 2012-12-04

 

　　方法三：

1. Help -> Install new software 2. Click the 'Add' button Name : Rockstar Apps (or whatever you want) Location : http://update.rockstarapps.com/site.xml 3. expend the selection and check Rockstar JsLint 4. Click 'Next'...again 5. Accept and install (you'll have to hit okay when it prompts you about installing unsigned content). 6. Restart Eclipse...

 

资料参考

　　1、http://www.ibm.com/developerworks/cn/web/1105_linlin_jslint/

　　2、http://stackoverflow.com/questions/2741058/jslint-eclipse-plugin

　　3、http://www.andyjamesdavies.com/javascript/installing-jslint-on-eclipse-ide