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description= With JavaScript Lint, you can check all your JavaScript source code for common mistakes without actually running the script or opening the web page.;
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overview javascript lint javascript lint overview download documentation integrations overview what it is many javascript implementations do not warn against questionable coding practices yes that s nice for the site that works best with internet explorer designed with templates scripted with snippets copied from forums but it s a nightmare when you actually want to write quality maintainable code that s where javascript lint comes in with javascript lint you can check all your javascript source code for common mistakes without actually running the script or opening the web page what it does here are some common mistakes that javascript lint looks for missing semicolons at the end of a line curly braces without an if for while etc code that is never run because of a return throw continue or break case statements in a switch that do not have a break statement leading and trailing decimal points on a number a leading zero that turns a number into octal base 8 comments within comments ambiguity whether two adjacent lines are part of the same statement statements that don t do anything javascript lint also looks for the following less common mistakes regular expressions that are not preceded by a left parenthesis assignment colon or comma statements that are separated by commas instead of semicolons use of increment and decrement except for simple statements such as i or i use of the void type successive plus e g x y or minus e g x y signs use of labeled for and while loops if for while etc without curly braces this check is disabled by default advanced users can also configure javascript lint to check for undeclared identifiers javascript lint javascript lint info at javascriptlint com with javascript lint you can check all your javascript source code for common mistakes without actually running the script or opening the web page
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