JavaScript

JavaScript Basics – Scope What is scopeA scope defines a series of rules for where a variable is found and how it is found . Usually we define a variable in JS with a certain range of calls, such as global variables can be called anywhere, and this

1 //Val is the data of the DateTime type of C # that is directly serialized by JSON2 functionFormattime (val) {3 varRe =/-?\d+/;4 varm =Re.exec (val);5 varD =NewDate (parseint (m[0]));6

Promises is an asynchronous programming model that standardizes asynchronous operations through a set of APIs, which makes it easier to control the flow of asynchronous operations.The following code assumes that an asynchronous queue is executed,

Event bubbling: If element A is nested in element B, then a is clicked not only A's OnClick event will be triggered, and the onclick of B will also be triggered. The order of triggering is "from inside Out". 　　　　Verify: Add a div, p, strong on

JavaScript from definition to execution, JS engine has done a lot of initialization in the implementation layer, so before learning the JS engine working mechanism, we need to introduce several related concepts: execution environment stack, global

//element Dom Selection//On is tag names.//All the divs on the page:$$ (' div ');//All the divs and paragraphs//Note:this returns an array with all the divs first,//Then all the paragraphs:$$ (' div ', ' P ');//When you include Selectors.js, you can/

Dictionary is often called a data dictionary, is a data structure used to hold key-value pairs, such as our daily phone book, is a dictionary. We can access the corresponding value (phone number) by the key (name). In C + + and Java We all use map

In the long front-end development journey, inevitably will be exposed to Ajax, and generally is used in the same domain AJAX requests, but if the request is in a different domain, the request cannot be executed, and will throw an exception prompt

I. Methods of UseUsing the circular progress bar requires the introduction of the Circledonutchart.js file.Second, HTML structureYou can use an empty element to create a circular progress bar.Third, initialize the plug-inTo make a circular progress

Summary of the method for displaying single-line and multi-line text overflow with ellipsis, multi-line text ellipsis Requirements: In front-end page layout, too many texts often affect page layout. Especially on mobile pages, la s are not displayed

Set the character size font-size to 100%, font-size100 % Set font-size to 100%:In the Code, there are often some strange code that can play an extraordinary role. The following describes how to set the font size.The following code is available in

How to Use grunt to package JavaScript and CSS programs, gruntcss Maven in the Java World provides powerful package dependency management and build lifecycle management. In the JavaScript world, with the popularity of Node. js, JavaScript native

Js and jQuery implement the checkbox check box all/all do not select the method, jquerycheckbox The example in this article describes how to select all or not select the checkbox check boxes in js and jQuery. We will share this with you for your

Bootstrap implements the pop-up window and drag effect, while the bootstrap pop-up window is dragged Sometimes it is nice to develop some special effects. You can operate Your webpage like on your computer. Here we will introduce a little more

Add text description and css text description on the image for css implementation Add text instructions on the image for css implementation:In some image effects, there is a text description on the image. The following describes how to achieve this

Javascript implements the preview effect of the input file Upload image, javascriptinput This article introduces the detailed code for javascript to implement the preview effect of the input file Upload image. The details are as

CSS implements code that is compatible with the code of div suspended on the webpage side of all browsers. cssdiv The Code implemented by CSS is compatible with the code of div suspended on the webpage side of all browsers:CSS provides the position:

JQuery drag elements and re-sort them. jquery drag elements to sort them. This article describes how to drag and sort elements by jQuery. The specific implementation content is as follows: : The details are as follows: We can see the functions we

Table content control (line feed, no line feed, hidden), table line feed . Table th ,. table td {word-wrap: break-word; // the word-break: break-all; // The word can be wrapped in white-space: pre-wrap; // It only works for Chinese characters, and

JavaScript checks whether an object is an array, This article shares with you three JavaScript methods to determine whether an object is an array, 1. typeof The first thing we will think of is to use typeof to detect data types. However, for basic