Catch Javascript Syntax Error
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Syntax Error On Token Catch Identifier Expected Java
other. Join them; it only takes a minute: Sign up javascript - catch SyntaxError and run alternate function up vote 10 down vote favorite I'm trying to build something on javascript that I can have an input that can be everything like string, xml, javascript and (non-javascript string without quotes) as follows: //strings eval("'hello I am a string'"); javascript syntax error code 0 /* note the following proper quote marks */ //xml eval(
Hello I am a XML doc
); //javascript eval("var hello = 2+2;"); So this first 3 are working well since they are simple javascript native formats but when I try use this inside javascript //plain-text without quotes eval("hello I am a plain text without quotes"); //--SyntaxError: missing ; before statement:--// Obviously javascript interprets this as syntax error because it thinks its javascript throwing a SyntaxError. So what I would like to do it to catch this error and perform the adjustment method if this occurs. I've already tried with try catch but it doesn't work since it keeps returning the Syntax error as soon as it tries to execute the code. Any help would be much appreciated Cheers :) Additional Information: Imagine an external file that javascript would read, using spidermonkey, so it's a non-browser stuff(I can't use HttpRequest, DOM, etc...)..not sure if this matters, but there it is. :) javascript try-catch quotes syntax-error spidermonkey share|improve this question edited Mar 12 '10 at 22:52 askeLearn Bootstrap Learn Graphics Learn Icons Learn How To JavaScript Learn JavaScript Learn jQuery Learn jQueryMobile Learn AppML Learn AngularJS Learn JSON Learn AJAX Server Side Learn SQL Learn PHP Learn ASP Web Building Web Templates Web Statistics Web
Javascript Syntax Error Checker
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- sql HTML & Graphics Tutorials getting started backgrounds buttons browser specific colors forms frames html 4.01 tags html 4.01 http://www.htmlgoodies.com/html5/javascript/handling-javascript-errors-by-type.html ref image maps tables web graphics Beyond HTML asp cascading style sheets css keyword ref cgi scripting developer research center dhtml/layers dot net java applets javascript http://www.tutorialspoint.com/javascript/javascript_error_handling.htm javascript frameworks javascript keyword ref javascript script tips mobile web development open source cms php security SEO vb script keyword ref webmaster tips webmaster projects webmaster syntax error toolbox video xml general reference pieces the master list Need Help? discussion boards mentors HTML Goodies : HTML5 : HTML5 and JavaScript Post a comment Email Article Print Article Share Articles Reddit Facebook Twitter del.icio.us Digg Slashdot DZone StumbleUpon FriendFeed Furl Newsvine Google LinkedIn MySpace Technorati YahooBuzz Handling JavaScript Errors by Type By javascript syntax error Rob Gravelle Tweet There are four major error types in programming: compile errors, logic errors, input/validation errors, and runtime errors. Error catching in code is usually limited to the latter two types. It would be nice if you could handle your own logic errors at runtime, but sadly, there is no such code construct yet. As for syntax errors, an interpreted language like JavaScript won't catch those until the script is loaded into and read by the browser. While you normally can't catch syntax errors, as we'll see shortly, there are times that you can. Today's article will discuss the syntax error, along with two other error types, while the next installment will cover the remaining three. The Six JavaScript Error Types The JavaScript 1.5 specification defines six primary error types, as follows: EvalError: Raised when the eval() functions is used in an incorrect manner. RangeError: Raised when a numeric variable exceeds its allowed range. Ref
Syntax Javascript - Enabling Javascript - Placement Javascript - Variables Javascript - Operators Javascript - If...Else Javascript - Switch Case Javascript - While Loop Javascript - For Loop Javascript - For...in Javascript - Loop Control Javascript - Functions Javascript - Events Javascript - Cookies Javascript - Page Redirect Javascript - Dialog Boxes Javascript - Void Keyword Javascript - Page Printing JavaScript Objects Javascript - Objects Javascript - Number Javascript - Boolean Javascript - Strings Javascript - Arrays Javascript - Date Javascript - Math Javascript - RegExp Javascript - HTML DOM JavaScript Advanced Javascript - Error Handling Javascript - Validations Javascript - Animation Javascript - Multimedia Javascript - Debugging Javascript - Image Map Javascript - Browsers IMS DB Resources Javascript - Questions And Answers Javascript - Quick Guide Javascript - Functions Javascript - Resources Selected Reading Developer's Best Practices Questions and Answers Effective Resume Writing HR Interview Questions Computer Glossary Who is Who JavaScript - Errors & Exceptions Handling Advertisements Previous Page Next Page There are three types of errors in programming: (a) Syntax Errors, (b) Runtime Errors, and (c) Logical Errors. Syntax Errors Syntax errors, also called parsing errors, occur at compile time in traditional programming languages and at interpret time in JavaScript. For example, the following line causes a syntax error because it is missing a closing parenthesis. When a syntax error occurs in JavaScript, only the code contained within the same thread as the syntax error is affected and the rest of the code in other threads gets executed assuming nothing in them depends on the code containing the error. Runtime Errors Runtime errors, also called exceptions, occur during execution (after compilation/interpretation). For example, the following line causes a runtime error because here the syntax is correct, but at runtime, it is trying to call a method that does not exist. Exceptions also affect the thread in which they occur, allowing other JavaScript threads to continue normal execution. Logical Errors Logic errors can