JavaScript

JavaScript is a scripting languageAlert ("") Warning dialog boxConfirm ("") appears OK and cancelConfirm ("") lets the user enterData typeDefined variables are defined with var .Variable transformation into integer parseint()Determines whether a

　　two commonly used representations : JavaScript is a scripting language that must be placed between to invoke　　semicolon (;): Java is not the same as JavaScript, and Java does not add semicolons to the dead. Javasript is optional, preferably plus.

The data type in JS1. Numeric (number): Includes integers, floating-point numbers. 2. Boolean Type (Boolean)3. String type4. Objects (object)5. Arrays (Array)6. Null value (NULL)7. Undefined (Undefined)Second, determine the data type of a variable 1.

NanyiJavaScript is an object-based (object-based) language, and everything you encounter is almost always an object. However, it is not a true object-oriented programming (OOP) language because it has no syntax class (class).So, what should we do if

1. Creation of nodesNodes are created using document.createlment (); text nodes are created using Document.creattextnode (); If you want to add cantaloupe to a list like the one shown below Apple Orange watermelon Pear You can

　　JavaScript objectsJavaScript objects are one of the basic data types and are composite data;Almost everything in JavaScript is an object;JavaScript objects are data that has properties and methods;Objects in JavaScript can be simply interpreted as

JS syntax1. JavaScript data typeJavaScript has a dynamic type. This means that the same variables can be used for different types: strings, Numbers, Booleans, objects, arrays, undefined, and nullObject:var person={firstname: "John", LastName : "Doe"

To figure out a closure, you must first understand the scope of the variable: global (variable), local (variable). Global variables that can be read directly wherever you are:var n = 123function me () { alert (n);} me (); // must pop

JavaScript makes a schedule Date ()

JS print output is by Doucument.write (), the implementation of the document.write () can write variables, text text needs to be added "".JS There are two ways to insert into the HTML page 1: write JS code This tag is placed in and two tags

One of the basics of javascript---functionDefinition of Function:1. Direct definitionFunction Test () {content, the logic that you want to handle}2. Variable typevar demo = function () {content, the logic that you want to handle};3. Use functionvar

　JavaScript data types1. Original Data type:numeric , such as decimal number, hexadecimal number, octal number, and special value (Infinity, nan), note: NaN cannot compare itself withString type , such as delimiter, escape character;the Boolean type

? I will walk through this life, and never again. All the good deeds that are in your power, all the good intentions that are filled with heart, I will not hesitate to Pour. I will not delay, no longer indifferent, only because the road of this life,

I think this society, also not bad money many people, may be a lot of people also not bad power, but I think can get this kind of satisfaction is not Much. – Guoxiaoping ? A tree is a data structure that is often used in computer science. A

JSON is the main format of Internet Data transmission, Many programming languages have a parser and serializer for json, in the web foreground field, JS object and JSON string conversion requirements are more Common.This article mainly explains the

array de-weight 　　3 ways to De-weigh JavaScript arrays

Common phonegap events and phonegap events In any PhoneGap project, you should first listen to the deviceready event. Event trigger indicates that the DOM has been loaded and the PhoneGapAPI has been loaded. In this case, you can detect other events

Vue implements countdown plug-in timestamp refresh jump without affecting vue jump A countdown plug-in needs to be developed in the work, so I started to take it online first. I found that many countdown plug-ins will be refreshed from the beginning,

understanding: metaviewportwidth The ViewPort flag is used to specify whether the user can scale the Web page. If yes, what is the maximum and minimum scaling ratio. Using the ViewPort flag also indicates that the document has been optimized for

Doctype, strict mode, and hybrid mode Document declaration, located at the beginning of the document, before the label. This tag tells the browser document which HTML or XHTML specification is used. Used to inform the browser of the mode in which