Notes for String concatenation in javascript

During development, you will also pay attention to using StringBuilder instead of the common String concatenation method. However, most developers may ignore this efficiency issue in js.Let's take a performance test and talk about it with facts!Copy

The error message "unterminated string literal" is returned when the mysql output data is assigned to the js variable.

Read a text data from mysql and pay it to js variables suchCopy codeThe Code is as follows:However, Firefox always reports the unterminated string literal error. Copy the text to the txt file and several black blocks are displayed. It turns out to

Jquery checkbox: select all, deselect all, and select method 3.

Jquery.checkboxes.zip, decompress and reference to the page using the plug-in,You don't need to talk about this! Let's take a look at the specific example below. In order to give everyone a better understanding, I directly paste the code that

All of you are tired after the end of the weekend. Let's take a look at the interview questions in the cold winter)

Preface Although I have a very good CSS level, water is not a good reason. In the recent winter, the eldest brother gave me a bit of "cool" for the interview. Let's take a look at what his Weibo says? Normal flow, containing block, bfc, margin

Jquery ui accordion implements background folding menu

Today, let's talk about Accordion in jquery ui. This function is mainly used to achieve the folding effect. It is suitable for menus and the commonly used Accordion... Let's take a look at our results: If the drag function is missing, there will

Do not enter non-numeric characters such as mobile phone number or zip code in the text box

At work, there are always a lot of text boxes that prohibit non-numeric character input, such as the mobile phone number and the zip codeCopy codeThe Code is as follows:

Introduction and programming demonstration of SVG-based web page drawing API

I. What is SVG? SVG is a 2D graphic description language released by W3C in 1999. It is a markup language based solely on XML format.The full name is extensible vector graphics, which is very different from traditional Raster graphics (JPG, PNG, GIF,

Replace () text with what you don't know

Copy codeThe Code is as follows:// Convert word-word to wordWordFunction camelize (s ){Return s. replace (/-(\ w)/g, function (strMatch, p1 ){Return p1.toUpperCas ();});} Here we have applied the replace function, which is familiar to everyone. Now

Differences between jQuery object data Cache principle and jQuery. data method

There are many ways to use jQuery on the Internet. data (..) to implement data caching, but two users often use data ([key], [value]) and jQuery. data (element, [key], [value]) has almost no articles to clarify the differences between them, so I

Introduction to js app for obtaining html parameters and passing parameters to swf

We know that the HTML page is executed on the client. To obtain parameters, you must use a client script (such as JavaScript), which is different from the method used by the server script to obtain parameters.The following js Code retrieves an HTML

Jquery's $ getjson call and remote retrieval of JSON strings

The Code is as follows:Copy codeThe Code is as follows: untitled document click Where ajax6.asp isCopy codeThe Code is as follows:Response. Write ("{name: 'Peter ', age: 18 }");%> Why can't I get it ?, I want to obtain the json of asp.Key and

The js DOM element ID is a global variable.

Standard Specification The HTML5 standard document states that if an element meets any of the following two rulesThe window object must have an attribute corresponding to it. The attribute value is the object. If an element has the ID attribute,

Js dynamically inserts enctype = multipart/form-data on the form

We all know that to allow the form to submit files, you must specify enctype = multipart/form-data attribute on the form to upload files. There are many articles about enctype, so we will not explain them any more.The problem is that the MVC Html.

Javascript Object-Oriented Programming (coolshell)

A colleague has been asking me about Javascript object-oriented things these two days. So, just write an article and let him see it, this article mainly aims to introduce Javascript object-oriented programming from a holistic perspective. (The

Javascript object-oriented extension library code sharing

The lang. js Library provides the definition of packages and classes, class inheritance and mixing (mixin), function overloading, and other functions, which can basically meet the needs of most object-oriented design. It also supports the

JQuery code for changing the page font size (Real-time changing the page font size)

Copy codeThe Code is as follows:/*Increase, decrease, and restore the original font size on the page.Three elements need to be defined in the html pageThe element classes are resetFont, increaseFont, and decreaseFont.The JQuery events in this file

Js Code for Traversing Object Attributes

For example:Copy codeThe Code is as follows:Function. prototype. addMethod = function (methodName, func ){If (! This. prototype [methodName]) {This. prototype [methodName] = func; // Add a method to the prototype, which affects the type of instances.

Basic concepts of JavaScript Kernel

This chapter describes the data types (Basic Types and reference types), variables (including the scope of variables), and operators (mainly common, but not operators that can be understood literally ). Because "Everything is an object" in

Thoughts on the call mechanism caused by the call () method in JavaScript

Cause:Today, when I read the top five jQuery (taking DOM elements) of snandy, I can see the toArray () method. The specific jQuery code is as follows:Copy codeThe Code is as follows:ToArray: function (){Return slice. call (this, 0 );},Get: function (

Get range Standardization

W3c range Range is used to indicate the user's selection area. This selection area is defined by two boundary locations, and the location is composed of its container and offset, called container and offset. The following is a simple location

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