JavaScript

 promise is a very simple concept, and even if you don't have a chance to use it, chances are that you've learned about it. Promise is a valuable constructor that can help you avoid using nested anonymous methods and assemble asynchronous code in a

① first uses C # in the background to get the menu data in the database, to generate a JSON array containing the menu data items (for some reason not using the order by in SQL), as follows: View Sourceprint?var menudata1=[ {"OrderID": -10,

First measurement var map, toolbar, Geometryservice; function init () { map=new ESRI. Map ("Map", { extent:new esri.geometry.Extent ({xmin:110,ymin:31, xmax:117, ymax:37,spatialreference:{wkid:4326} }) ;//Selected

Stack: LIFO. Stack top at the end, bottom of the stack in the front. The newly added element and the element to be deleted are saved at the end of the stack.Create a stack:functionStack () {varitems = [];/*Save the elements in the stack with an

Statement Description Break Used to jump out of a loop. Catch Statement block that executes a catch statement block when a try statement block performs an error. Continue Skips an

First, touch events Touchstart: Triggered when the finger touches the screen, even if a finger has been placed on the screen. Touchmove: Triggers continuously when the finger is sliding on the screen. During this world, calling

How does JavaScript come to be parsed? What is the order of its execution? Before we get into this, let's start with a few important terms:1. Code blockCode blocks in JavaScript refer to snippets of code that are split by JS is compiled and executed

DescribeThis example shows if you delete the tick marks of the zoom level slider. This is done by setting the Sliderlabel in esriconfig to null:EsriConfig.defaults.map.sliderLabel = null;By default, the zoom level slider is vertically oriented. You

This example describes how JavaScript determines whether an array contains a specified element. Share to everyone for your reference. Specific as follows:This code defines the array method through prototype, so that the Contains method can be called

varurl = "http://www.taobao.com/index.php?key0=0&key1=1&key2=2 .......";varobj =parsequerystring (URL); functionparsequerystring (argu) {varstr = argu.split ('? ') [1]; varresult = {}; vartemp = Str.split (' & ')); for(vari=0; i) { varTemp2 =

Performance JS in the performance of a number of places to note: Avoid global lookups JS Performance optimization The most important thing is to pay attention to global lookup, because the scope of the lookup is to find the local

The cursor of the text box (input or Textarea) cannot modify the style (except to modify the cursor color by color). But I want the individual to create their own website when the text box cursor has its own style. so, try to simulate the cursor of

Introduction to HTML and introduction to htmlWhat is HTML? HTML is a language used to describe web pages. HTML refers to the hypertext markup language (HYperTExtMArkupLAnguage) HTML is not a programming language, butMarkup Language(Markup

JS variables and their scopes, JS variable scopes 1. variables and their scopes: variables are classified into "global variables" and "local variables". The "global variables" are declared outside the function and can be used by all functions, the

Typical grid layout effect instance implemented by Bootstrap [demo source code] And bootstrapdemo This article describes the classic grid layout implemented by Bootstrap. We will share this with you for your reference. The details are as

7. Document Stream-related and Document Stream 1. What is a document stream? A document flow shows the position occupied by objects in a document. In other words, the form is divided from top to bottom into one row, and the elements are discharged

Example of the 2D log pie chart implemented by jQuery plug-in HighCharts [demo source code download] And jqueryhighcharts This article describes the 2D log pie chart implemented by the jQuery plug-in HighCharts. We will share this with you for your

Describes Vue methods and events and Vue method events. One vue method implementation Vue method and event click me Method 2 passing Parameters Vue method and event say hello said I was clicked 3. vue accessing

Js obtains ip addresses and regions, and js obtains ip regions. This interface is currently available for Sohu, and does not know whether it will expire in the future. : The Code is as follows: t1 click to obtain the ip address click

Css implements background transparency, text opacity, and css implements background opacity The following three methods are usually used to implement transparent css: The Opacity is 80%. Opacity of css3: x, x values from 0 to 1, such as opacity: 0.