javascript function expression

console.log (i); 4 }5 }; 6 TestFunc (); 7 Console.log (i);This code, like the code above, is defined by a function expression.　　1 function () {2 for (var i=0;i) {3 console.log (i); 4

Original: JavaScript immediately invokes the function expression n type of notation (second article)　　Previous blog I talked about converting a function declaration to a function expression the most common way to do this is to con

This article mainly introduced the JavaScript in the immediate execution function expression Introduction, this article emphatically explained what is calls the function expression immediately, needs the friend to be possible to refer to under We're used to seeing anonymou

Two common ways to use the notation:(function(){/ * code * /} ()); (recommended wording )(function(){/ * code * /})(); Q:Why do you write this, and the function executes immediately?A:Because in JavaScript, parentheses cannot contain statements, and when the parser interprets the code, it encounters the () and then th

performance in each browser is also superior, plus +-one character less than ().　　FAQ : We may often see some plugins preceded by A; semicolon, which I understand as follows:Glue () plugin (function() {//..... preceding should add; semicolon }) ();Uncaught typeerror:undefined is not a functionThe glue () function and plug-in execution are not error-free, but when glue () is combined with the plugin in some

a function is called as a method, this is the equivalent of that object. When each function is invoked, this function will automatically fetch two special variables: this, arguments. The intrinsic function searches for both variables only until the active object is searched. 6, imitate block-level scope (priva

Function expression in javascript Functions in JavaScript are actually equivalent to methods in java, but the format of method definition is different. However, java and JavaScript are completely different languages. If you don't think either of them has a java, you think t

i=0 function is executed, so that its resulting I value is the current 0, and in Fn1, to result[j] function call, I is already 10, so it all the results are 10;Now let's take a look at the problem of the scope chain and explain the above example from this perspective.When a function is called * *, it occurs:* An execution environment is created;* The scope chain

Recent situation: has been busy to find internships have not been updated, but the study is still continuing. I recently wrote node. JS and picked up the JavaScript corner for half a month to see Python and some deep CSS books and blogs. Work to find the good, took two internship offer, decided to go when the small two. These days in a look at the teacher's "JavaScript Framework Design", the first to talk a

this series as effective JavaScript 's reading notes. The so-called immediate invocation of the function expression, this translation may not be very accurate, it corresponds to the original English is Immediately invoked Function Expression (iife) . The following also uses

This question already have an answer here: var functionname = function () {} vs function functionname () {} answers What is the difference between the following lines of code?Function declarationfunction foo () {return 5;} Anonymous function Expressionvar foo =