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(1) Introduction to the use of the Eval function in the JavaScript tutorial
(2) How to execute global code within a function
? First, the use of eval, the content is relatively simple, familiar can skip.
The Eval function receives an argument s, and if S is not a string, it returns directly to S. Otherwise execute the S statement. If the S statement executes the result is a value, this value is returned,
Javascript| tutorial using OLE Automation in JavaScript
7. How to deal with set objects
The automation object has the same structure as some of its JScript objects. It exposes a variety of methods and properties that we can handle. If you have never contacted Visual Basic, you may not be familiar with the set object. A set is a group of related items. The set i
Tutorial using OLE Automation in JavaScript
5. How to handle an instance of an application
A document template is a connection between an application and the document it supports. There are two types of document templates: a single document, which can open only one type of document at a time, and multiple document templates, which allow multiple documents to be opened at the same time. The following table
AJAX: implement mutual exclusion secrets in AJAX programs. The Javascript tutorial is more and more widely used with AJAX examples, browser pages can maintain the activity of the front-end user interface while requesting data from the backend server (thus called asynchronous in AJAX ). However, when the two activities access the shared JavaScript and DOM data str
JavaScript: String operations in JavaScript, Javascript tutorial
I. OverviewStrings are almost everywhere in javascript. When you process user input data and read or set DOM object attributes, there are more strings when operating cookies .... The core part of
, logical operators, bitwise operators, ternary operators.The operators in JavaScript are roughly the same as Java. Just a few points to note during the operation:
var x = 3120/1000*1000; x = 3120 instead of 3000
var x = 2.4 + 3.6; x = 6 instead of 6.0
var x = "12" + 1; x = "121" Because the plus sign is a connector for a string
| | is the logical operator, | is a bitwise operator
Ternary operators are al
This article mainly introduces detailed information about the {} statement block in javascript. For more information about how to parse the json string, see the next tutorial. an eval () method is used, why should we add parentheses when parsing strings? Confused. In the original javascript, the {} statement block has two meanings, and errors may occur without pa
Javascript Tutorial: querySelector () method,
Module dom {[Supplemental, NoInterfaceObject]Interface NodeSelector {Element querySelector (in DOMString selectors );NodeList querySelectorAll (in DOMString selectors );};Document implements NodeSelector;DocumentFragment implements NodeSelector;Element implements NodeSelector;};
From the interface definition, we can see that Document, DocumentFragment, and Eleme
Tutorial: http://javascript.ruanyifeng.com/Basic syntax-functions1. Promotion of Function nameThe JavaScript engine takes the function name as the variable name, and when the function is declared, the entire function is promoted to the head of the code. The following code will not error.f ();function f () {}However, using an assignment statement to define a function, Ja
javascript| Tutorial
Using OLE Automation in JavaScript
6. How to improve the performance of the script program
Since we are dealing with heavy object models (such as Word.Application) and application instances, it is important to note that the system's resources are shown. Once we have finished processing the application instance, we have to remove it to erase t
Javascript| tutorial using OLE Automation in JavaScript
6. How to improve the performance of the script program
Since we are dealing with heavy object models (such as Word.Application) and application instances, it is important to note that the system's resources are shown. Once we have finished processing the application instance, we have to remove it to erase
javascript| Function | tutorial
Date functions that use JavaScript
The date (date) object can be created using the date () constructor, and in the previous tutorial we have introduced the date () constructor, which is not repeated here. It has no parameters, and the returned value is the current date. The following tab
object again and add a new property to it 4 5 var a=[1,2,3]; // Arrays are also modifiable 6 a[0]=0; // 7 a[3]=4; // add an element to the array Comparisons of arrays and object types are reference comparisons, similar to the Java language, where two objects are unequal, even if they are of the same type and have the same property values. Only two references point to the same object, and the two references are equal.Type conversionsBecause of the weak type of
Functions of JavaScriptIf you have any programming experience, you don't need to spend too much time on this lesson. The JavaScript function behaves in the same number of programming languages (C, C + +, PHP, etc.). If this is your first time learning function, then be sure to go through this lesson very thoroughly. A solid understanding of the function will make the rest of this tutorial easier to follow.W
JavaScript Switch Getting Started walkthrough tutorial
Conditional declarations in JavaScript are used to perform different actions according to different conditions.
ExampleSwitch StatementHow to compose a switch statement.
JavaScript switch statement forYou should use the switch statement if you want to select a l
This article ish5eduAgency officialHTML5 Trainingtutorials, the main introduction:JavaScript Intensive TutorialsDOM Programming in the--jqueryDom programming in the JavaScript Hardening tutorial--jquery This article is the official NBSP;HTML5 training tutorial for H5EDU, the main introduction: JavaScript Intensive
AngularJS is an awesome JavaScript framework that is not only attractive to developers, but also good for UI designers. In this tutorial, we'll simply introduce some of AngularJS 's heavyweight features and how it can make your web app more powerful!Augularjs Brief Introduction
AngularJS is a new and powerful client-side technology that provides a way for you to develop powerful applications. This
HotMetal PRO 6.0 is a powerful and easy-to-use website editing and publishing tool. In this tutorial, we use javascript in HotMetal. In HotMetal, JavaScript Supports rich resources and Objects Based on HotMetal. It contains several new objects, such as the object accessing the DOM. In addition, HotMetal supports ActiveX controls. These controls and Windows Script
Main Introduction: JavaScript Intensive Tutorials --jquery UI API category The jquery UI adds some functionality to the jquery built-in effects. The JQuery UI supports color animations and Class conversions, as well as some additional easings. In addition, a complete set of custom effects is available for displaying and hiding elements or just adding some visual displays. The API description also belongs to the category. AddClass () adds the specifie
Introduction: Js2py Installation Library Now many Web sites have started to use JS encryption technology, so this library must be learned, or you will not be able to play with the tutorial js2py execute a single statement JS2PY executive function Summary: Now many of the Web site is writing crawlers to use JS encryption technology, so this library must learn ...Js2pyInstallation LibraryNow write a lot of Web sites are beginning to use JS encryption te
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