javascript dynamic variable name

Do you know the value of alert following JavaScript execution? var foo = 1; function Bar () { if (!foo) { var foo =; alert (foo); } Bar (); If you're surprised by the result of "10," you might want to take a good look at this article: var a =

For all types of execution contexts, some operations (such as variable initialization) and actions of variable objects are the same variable objects in different execution contexts. For all types of execution contexts, some operations (such as

JavaScript Learning record day6-function variable scope, deconstruction assignment and method@ (learning) [JavaScript][TOC]1. ScopeIn JavaScript, variables that are var declared are actually scoped.If a variable is declared inside the function body,

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Dynamic JavaScript JavaScript code is often combined dynamically through the server-side band and name. In the process of this combination, user-related information is saved to the JavaScript code. When the JavaScript script is routed to the

JavaScript programming always avoids the inevitable declaration of functions and variables to successfully build our system, but how and where do the interpreters look for these functions and variables? What exactly happened when we quoted these

JavaScript BasicsJavaScript is a scripting language that belongs to the web!JavaScript is used by millions of of pages to improve design, verify forms, detect browsers, create cookies, and more.JavaScript is the most popular scripting language on

, native JavaScript implements string length interceptionView Code2. Native JavaScript gets the domain hostView Code3. Native JavaScript Clear spaceView Code4. Native JavaScript replaces allView Code5. Native JavaScript Escape HTML tagView Code6.

ProfileWe always define functions and variables in the program, and then use these functions and variables to build our system.However, for the interpreter, how and where did it find the data (functions, variables)? What happens inside the

Directory1 History 2 clarifying misunderstandings 3 basic concepts 4 features 5 different from Java 6 development toolsHistoryProbably in 1992, a company called Nombas began developing an embedded scripting language called C-minus (C-minus-minus, or