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1th Chapter Essence Some of the features of JavaScript feature a lot more trouble than they are worth. Some of these features are because the specification is so imperfect that it can cause portability problems; Some features can lead to the

From: http://student.csdn.net/space.php? Uid = 45106 & Do = Blog & view = me Chapter 2 Some of the essential JavaScript features bring much more trouble than they do. Some of these features may cause portability problems due to imperfect

Chapter 2 Essence Some of the features of JavaScript bring much more trouble than they do. Some of these features may cause portability problems due to imperfect specifications. Some features may generate codes that are hard to understand and modify;

A variable defined outside a function must be a global variable, a variable defined within a function, and if Var is declared, the variable is a local variable, and if it is not declared Var, then the variable is a global variable. 1, global

JavaScript Overview of JavaScript history 1992 Nombas developed the embedded scripting language for C-minus-minus (c--), which was originally bound to Cenvi software, and renamed it Scriptease (the language that the client executes).

System Learning JS,Get started with JavaScript advanced programming, by learning jquery or angularjs source.Chapter 1th Introduction to JavaScriptThe purpose of the 1.JS is to handle some of the input validation actions that were previously

Nan represents a result of an operation that does not produce normal results. It does not equal any value, including its own. Can be detected with isNaN (number). Like a string in Java, the string in JS is immutable. This means that once a string

Nan represents a result of an operation that does not produce normal results. It does not equal any value, including its own. Can be detected with isNaN (number). Like a string in Java, the string in JS is immutable. This means that once a string

This article mainly introduces how to implement prototype extension in JavaScript. Examples of JavaScript prototype extension related skills for strings, dates, arrays, etc, for more information about how to implement prototype extension in js, see

Nan represents a result of an operation that does not produce normal results. It does not equal any value, including its own. Can be detected with isNaN (number). Like a string in Java, the string in JS is immutable. This means that once a string