JavaScript does not validate that the input string is empty (contains spaces)

In the project, you need to verify that the input string is empty, including spaces, and do not like to use regular, so I think of JS's indexOf function, the IndexOf () method returns the position of a specified string value in the first occurrence

JavaScript Effects Instance 015-open Window special effects

Example 015 opening a window special effects instance descriptionWhen you click on the page to open the connection, a window pops up in the upper left corner of the screen and dynamically changes the width and height of the window, and when the

"Learning Notes" JavaScript coding specification-Comments

Multiline comments using/**......*/, you need to include a description, a value for the specific type of all parameters, and a return value.bad//make () returns a new element//based on the passed in tag name////@param {String} tag//@return {element}

"Notes" JavaScript coding specification-commas and semicolons

Do not use commas before statements.Badvar stories = [Once, upon, atime];//goodvar story = [Once,upon,atime];Do not have extra commas: this can cause problems in IE6, IE7, and IE9 's weird patterns, and in some implementations of ES3, extra commas

JavaScript Framework Design---the Great God framework Research notes

Originally wanted to buy a teaching how to write a JS framework book, this book is the framework of the great God of the source reading notes, look at me this non-professional front end is very weak, often a few frames jump to jump, suddenly lost,

New compilers convert native code to JavaScript

Guide: The Emscripten-C + + to JavaScript project leverages the backend from LLVM to build a faster and more targeted compilation solution.When it was announced, Emsripten sounded like a full-on technology joke: A compiler that translates C + + code

JavaScript function scope and Lexical scope

Original Sticker Address: http://pierrespring.com/2010/05/11/function-scope-and-lexical-scoping/Personally feel good writing, easy to carry, if there are errors, please correct me.Wikipedia defines Scope as follows:Tipically, scope is used to define

A summary of JS object-oriented construction object based on JavaScript Advanced program Design

Introduction:In ECMAScript, there is no independent function, and all functions must be methods of an object. and a function is an object. The properties of all objects can be defined dynamically after the object is created , and early binding

JavaScript effect Instance 004-Auto-close AD window

Example 004 Auto-closed AD window Instance descriptionwhen the page runs for a certain amount of time, the specified AD window on the page is automatically closed. Technical EssentialsThis example mainly applies the settimeout () method of the

Problems with in loops and arrays in JavaScript

This article by Bole Online-elviskang translation, into the forest School draft. without permission, no reprint!English Source: adripofjavascript.com. Welcome to join the translation team.The for...in loop of JavaScript is used to iterate over an

Google browser JavaScript debugging tutorial

How do I open the developer tools for Chrome?You can right-click on the page and select the review element:Or find it in Chrome's tools:Or, you directly remember this shortcut: Ctrl+shift+i (or ctrl+shift+j directly to the console), or press F12

JavaScript Advanced Programming--Learn from scratch (1)

javascript--the client Web browser scripting language.What is language?Used for communication, with complete syntax and explicit semantics .A complete set of JavaScript implementations consists of three different parts:1,ecmasript (CORE)Just a

JavaScript axerror:unexpected token Illegal very simple code, but cannot explain the error

First look at the following code, the picture is written with notepad++, the above two code below the same, but the following is an error Start feeling is not a variable name problem, the results found not For this wonderful problem, I can only

Parsing xml--with HTML JavaScript my Bishi (ii)

Last time, we've got Openhab's XML Format page, which we're going to start parsing the resulting XML.I am using Hbuilder, to use the existing app base to open a webview to load HTML pages, to achieve the effect of the app.The HTML body section here

JavaScript data type and type detection functions-MOOC ArraysSimilar programming exercises

JavaScript data type and type detection functions-MOOC ArraysSimilar programming exercisesBasic Type stringNumberBooleanFunctionUndefinedObject (null, Array, Date, window) implicit conversion with "=" num-string var str = num + ''string-num var num =

Example of String. prototype usage in JavaScript, javascriptprototype

Example of String. prototype usage in JavaScript, javascriptprototype This example describes the usage of String. prototype in JavaScript. Share it with you for your reference. The details are as follows: // Returns the length of the character. A

Javascript to implement a light blue mouse drag select box instance, javascript light blue

Javascript to implement a light blue mouse drag select box instance, javascript light blue This example describes how to use javascript to implement a light blue selection box by dragging the mouse. Share it with you for your reference. The specific

JQuery-based Dynamic Scaling navigation menu instance and jquery navigation menu

JQuery-based Dynamic Scaling navigation menu instance and jquery navigation menu This article describes the Dynamic Scaling navigation menu implemented by jQuery. Share it with you for your reference. The specific implementation method is as follows:

Js table sorting instance analysis (int, float, date, string supported), instance analysis float

Js table sorting instance analysis (int, float, date, string supported), instance analysis float This document describes how to sort js tables. Share it with you for your reference. The details are as follows: SortTable2 Last Name

Smooth DIV border shadow and css div border shadow using pure CSS without Graphs

Smooth DIV border shadow and css div border shadow using pure CSS without Graphs CSS border shadow display content. http://www.999jiujiu.com/

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