JavaScript

1, three ways to use:1. Put in 2. Put in 3. Put in an external JS file2, three ways to output data:1. Use the document.write () method to write the contents to an HTML document.2. Use the Window.alert () pop-up warning box.3. Write to the HTML

Three ways to use : Put in the Put in the Placed in an external JS file Three ways to output data: Use the document.write () method to write content to an HTML document. Use the

Three ways to use : Put in the Put in the Placed in an external JS file Three ways to output data: Use the document.write () method to write content to an HTML document. Use the Window.alert () pop-

Basic Package TypeThe basic wrapper type is a special reference type . Whenever a primitive type value is read, the background creates an object of the corresponding basic wrapper type , which can be called by the property, method, and subsequent

There are many ways to make a carousel diagram.I think the most common is to put all the pictures in a div, and then only show the first one, the rest are hidden, and then a sheet of the display:DivID= "Container"> DivID= "List"style= "Left: -

1.BOM objectsWindow objectWindow objects are supported by all browsers.Conceptually speaking. An HTML document corresponds to a Window object.Functionally speaking: Controls the browser window.Use: The Window object does not need to create objects,

Chapter I JavaScript basics one. Introduction to JavaScript 1. Why learn JavaScript?JavaScript plays a very important role in Web page making, which can realizeA) Customer form verificationB) page Dynamic effectC) JavaScript is the basis of jquery2.

Operator is used to execute program code operations and is calculated for one or more operand items. 2+3, whose operands are 2 and 3, while the operator is "+". In the previous article we said that variables are used to store data, and the data in

Translator by: Among the 6 reasons for replacing Promise in async/await, we compared two different asynchronous programming methods:async/await and Promise, and this blog will introduce the example code How the async/await simplifies JavaScript code.

Functions are event-driven, or reusable blocks of code that are executed when they are invoked.Example1234Ten One A -try it - theJavaScript function syntaxA function is a block of code enclosed in curly braces, declared with the keyword

Objective Liudap 　　　In the front-end learning, we must use JS,JS can be said to be the front-end essential things. In the process of learning JS, we will often use this thing, and this point of the problem becomes particularly important. Today

1 continue with JavaScript event-related learning gogogo!!!! 2 3 HTML5 Event:4 5 1. ContextMenu Event Context Menu Event6 7 usually when we press the right mouse button, we will automatically pop up a context menu bar, but sometimes we do not

1. Methods for generating regular expression objects1. var rx = new RegExp (pattern, attributes)Parameter pattern is a regular expression stringThe parameter attributes is a string, either I (for ignoring arguments) m (for multiline matching) g (for

Metacharacters (metacharacter) is a character that has a special meaning:Metacharacters description(1) . Finds a single character, in addition to line breaks and line terminators.Example: point Effect(2)\w find word characters.

The array is converted to a string:var a=[' aa ', ' BB ', ' cc ';var b=a.join ('-');Console.log (b)-----> ' AA-BB-CC 'Substitution in string: 1.replace can only replace the first character in a string that satisfies a conditionvar b= ' aa-bb-cc

Here's the point: BOM Object Window object:所有浏览器都支持window对象.概念上讲 : 一个html文档对应一个window对象.功能上讲 : 控制浏览器窗口的.使用上讲 : window对象不需要闯将对象,直接使用即可.window对象方法 : > window.alter : 只做提醒用 > window.confirm : 会返回一个框 布尔值 true或者false > window.prompt :

One, inheritThe first way: The class is directly coupled to the inherited class with a high degree of1, first, prepare a class (parent class) that can be inherited, for example // Create a person class function person (name) {// now the field

[Note] highlights of HTML + CSS (occasionally updated) and summary of css 1. When a td occupies multiple rows/columns, the trended td is not written (but the tr of the td package must be written) 2. display: Text in the td element is vertical by

Relative Features of CSS and CSS relative Features1. features: For exampleleft,right,top,bottomPositioning is relative to positioning. WhenleftAndrightBoth exist,lfetEffective. WhentopAndbottomBoth exist,topEffective. No intrusion. The original

How does background-image use svg to change the color, Conclusion After multiple tests, I found that the background-image uses svg, and there is no way to change the color. AnalysisWhen an svg image is used as a background-image, the color setting