define hoisted

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 =

Translated from: http://www.adequatelygood.com/JavaScript-Scoping-and-Hoisting.htmlDo you know what the result is if the following code executes?var foo = 1; function Bar () { if(! Foo) { var foo = ten; } Alert (foo);} Bar ();The result

I want to learn about the improvement of var pre-parsing and function declaration in javascript. I am not familiar with the knowledge of var pre-parsing and function declaration. I will share this article with you. 1. var variable

Enforcing optionsWhen set to true, these options would make jshint produce more warnings about your code. Bitwise This option prohibits the use of bitwise operators such ^ as (XOR), | (OR) and others. Bitwise operators is very rare in JavaScript

Original: http://www.adequatelygood.com/JavaScript-Scoping-and-Hoisting.html= = = Translation starts = = =Do you know what the following JavaScript script execution results are?1 var foo=1; 2 function Bar () {3 if (! foo) {4 var foo=10; 5

Original link: http://www.adequatelygood.com/JavaScript-Scoping-and-Hoisting.htmlJavaScript scopes and Declaration elevationDo you know the value of alert after JavaScript is executed?1 var foo = 1; 2 function Bar () {3 if (! foo) {4 var

Variable declaration "was advanced"The syntax of JavaScript is similar to C, Java, C #, and is collectively referred to as Class C syntax. Students with C or Java programming experience should be familiar with the "declare first, later use" rule,

HoistVt. Arise, lift;VI. be lifted or elevated;N. cranes, lifts; Rises Push, hold, lift; This article does not speak English, but for some English words can not find a good translation, the first to list the word "hoist" is to let everyone

HoistVt. Arise, lift;VI. be lifted or elevated;N. cranes, lifts; Rises Push, hold, lift; Original address: http://www.bootcss.com/article/variable-and-function-hoisting-in-javascript/This article is very good written, a look on it, the first

var foo = 1;function Bar () {if (!foo) {var foo = 10;}Alert (foo);}Bar ();//Explanation: JS does not have block-level scope, if switch while etc. will not have block-level scopeIf you are surprised that the value of Foo is actually "10", take a look