book

Sams Teach Yourself JavaScript in 24 Hours, Seventh Edition

by Phil Ballard

September 2018

Beginner

501 pages

10h 32m

English

Sams

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Who This Book Is ForOur AimsConventions UsedQ&A, Workshop, and ExercisesHow Things Are OrganizedTools You’ll Need

Web Scripting FundamentalsSummaryQ&AWorkshopExercises
Including JavaScript in Your Web PageWriting JavaScript StatementsUsing VariablesWorking with OperatorsCapturing Mouse EventsSummaryQ&AWorkshopExercises
General SyntaxCalling FunctionsSummaryQ&AWorkshopExercises
Scope of VariablesArrow FunctionsSetting Default ParametersSummaryQ&AWorkshopExercise
Interacting with the UserSelecting Elements by Their IDAccessing Browser HistoryUsing the location ObjectUsing Dates and TimesSummaryQ&AWorkshopExercises
NumbersGlobal MethodsThe Number ObjectThe Number() FunctionBoolean ValuesThe values null and undefinedSummaryQ&AWorkshopExercise
StringsTemplate StringsSummaryQ&AWorkshopExercise
ArraysHow to Iterate Through ArraysThe Three-Dots OperatorSummaryQ&AWorkshopExercises
Types of EventsEvent HandlersThe event objectSummaryQ&AWorkshopExercises
Conditional StatementsLoops and Control StructuresHow to Set and Use TimersSummaryQ&AWorkshopExercises
What Is Object-Oriented Programming?Object CreationExtending and Inheriting Objects Using prototypeEncapsulationSummaryQ&AWorkshopExercises
ClassesObject InheritanceFeature DetectionSummaryQ&AWorkshopExercise
DOM NodesSelecting Elements with getElementsByTagName()How to Read an Element’s AttributesMozilla’s DOM InspectorSummaryQ&AWorkshopExercises
What Is JSON?How to Access JSON DataData Serialization with JSONJSON Data TypesHow to Simulate Associative ArraysHow to Create Objects with JSONJSON SecuritySummaryQ&AWorkshopExercises
Markup for HTML5Some Important ElementsDrag and DropLocal StorageHow to Work with Local FilesSummaryQ&AWorkshopQuizExercises
A Ten-Minute CSS PrimerThe DOM style PropertyHow to Access Classes Using classNameThe DOM styleSheets ObjectSummaryQ&AWorkshopExercises
Vendor-Specific Properties and PrefixesCSS3 BordersCSS3 BackgroundsCSS3 GradientsCSS3 Text EffectsCSS3 Transitions, Transformations, and AnimationsHow to Reference CSS3 Properties in JavaScriptHow to Set CSS3 Properties with Vendor PrefixesSummaryQ&AWorkshopExercises
What Are Cookies?Using the document.cookie PropertyReviewing Cookie IngredientsWriting a CookieWriting a Function to Write a CookieReading a CookieDeleting CookiesSetting Multiple Values in a Single CookieSummaryQ&AWorkshopExercises
Creating a Regular ExpressionSummaryQ&AWorkshopExercises
Revisiting ScopeReturning a Function from a FunctionAchieving ClosureSummaryQ&AWorkshopExercise
Why Use Modules?Module BasicsExportingImportingSummaryQ&AWorkshopExercise
Don’t Overuse JavaScriptHow to Write Readable and Maintainable CodeGraceful DegradationProgressive EnhancementUnobtrusive JavaScriptFeature DetectionHow to Handle Errors WellSummaryQ&AWorkshopExercises
An Introduction to DebuggingMore Advanced DebuggingSummaryQ&AWorkshopExercise
Why Use a Library?What Sorts of Things Can Libraries Do?Some Popular Libraries and FrameworksA Closer Look at jQueryThe jQuery UIAn Introduction to AjaxHow to Use jQuery to Implement AjaxA Brief Look at Node.jsSummaryQ&AWorkshopExercises
EditorsValidatorsVerifying and Testing Tools

Content preview from Sams Teach Yourself JavaScript in 24 Hours, Seventh Edition

Lesson 23Debugging Your Code

What You’ll Learn in This Lesson:

Recognizing the types of errors common in JavaScript code

Carrying out simple debugging with alert()

Using the browser console and console.log()

Grouping messages in the console

Using ...

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Publisher Resources

ISBN: 9780135166963