{ "item_title" : "Refactoring JavaScript", "item_author" : [" Evan Burchard "], "item_description" : "If your JavaScript is a mess, frameworks can only do so much to help. No matter what framework, compiles-to-JS language, or library you use, bugs and performance concerns will always be an issue if the underlying quality of your JavaScript is poor. With this hands-on guide, you ll learn how test and refactor your existing code to help reduce complexity, improve readability, and gain confidence in the codebase.Author Evan Burchard shows you how to identify areas of bad code, and then takes you through several refactoring methods for improving them. Techniques range from renaming variables to applying principles of functional and object-oriented programming. If you re motivated to write better JavaScript code either on the frontend or backend, this book is a must.Use refactoring to restructure existing code, without changing its behaviorLearn the relationship between refactoring and qualityExplore the many versions of JavaScript in use todayCreate automated tests to confirm that your code works, and find bugs that slip throughLearn how to refactor simple JavaScript structures, functions, and objectsRefactor your codebase by applying object-oriented and functional programming principlesExamine methods for refactoring asynchronous JavaScript", "item_img_path" : "https://covers4.booksamillion.com/covers/bam/1/49/196/492/1491964928_b.jpg", "price_data" : { "retail_price" : "49.99", "online_price" : "49.99", "our_price" : "49.99", "club_price" : "49.99", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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