JavaScript

Recently encountered a problem, about the JavaScript loop, it really makes me more curious about the language (angry), words do not say, directly on the code:12345 This is a click event, I started with the idea of clicking on the p above, triggering

First, Window object:(1), all browsers support the Window object, which represents the browser window. All JavaScript global objects, functions, and variables automatically become members of the Window object.(2), the global variable is the property

How to get the standard browser1 varOdiv = document.getElementById (' div ');2 //get the computed font-size3 varSFs = getComputedStyle (Odiv,NULL). GetPropertyValue (' font-size ');//Recommended Use4 //or5 varSfs= getComputedStyle (Odiv,NULL).

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　　Here are some of the more commonly used methods of using strings, strings are arrays of characters, and in JavaScript, strings are immutable: You can access text anywhere in a string, but JavaScript does not provide a way to modify the contents of

function Hasclass (Elem, CLS) { cls = CLS | | "; if (Cls.replace (/\s/g, "). Length = = 0) return false; return new RegExp (' + CLS + '). Test (' + Elem.classname + ');} function AddClass (ele, CLS) { if (!hasclass (Elem, CLS)) {

1. JavaScript has only one exception class error, no need to declare the exception when defining the function, so there is no throws keyword2. JavaScript is a weakly typed language, so exception instances in parentheses after a catch statement do

OverviewThe quick platoon is looking for a base to comparePut him in front of him bigger than him, put him behind him.Then repeat this method for both the front and back parts to sortPlain and easy to understand versionlet list = [2, 3, 1, 9, 5, 6, 4

DOM: The Document Object model, which is also a programming interface for HTML and XML documents, is simply an interface, but is implemented in JavaScript.Any document can be drawn into a tree-like structure, such asDocument--> is an object, and

Loop controlJavaScript also provides some loop control functionality. Break terminating LoopsBreak can be terminated not only in a switch, but also in a loop.do while Loop The Code 12 line break terminates the loop.ContinueThe Continue keyword tells

I. SummaryIn Python learning we also learned a re module, in JavaScript is also supported regular, JS is relatively simple only two methods:Test-Checks whether the string matches the regular match and returns True,falseEXEC-Gets the contents of the

JavaScript is a programming language that we use to write client-side browser scripts. jquery is a library of JavaScript that contains several reusable functions to help us simplify JavaScript development jquery can do javascipt can do, and

/** output specified time format description for 2014.09.05 13:14:20yyyy: Year, 2014yy: year, 14MM: month, fill two bits, 09M: month, 9dd: date, fill two digits, 05d: date, 5hh:24 hours, fill Full two-bit, 13h:24-hour, 13hh:12-hour, two-bit,

First look at what is Javascript,javascript is Object-based and event-driven and has a relatively secure scripting language that is widely used for client Web development, and is a widely used scripting language for Web client development.

1. Add JavaScript to the Web pageThe first approach: write JavaScript code directly into an HTML documentThe second approach: writing JavaScript code to a separate fileFor example:2. JavaScript statementsJavaScript internal statements end with each

The 1.document object is a child of the Window object, can be used directly, and is used to get HTML page elements2.document Object PropertiesA) Alinkcolor activity link Colorb) LinkColor text link colorc) Vlinkcolor user has observed the text color

JavaScript1. OverviewJavaScript is a scripting language that is Object-and event-driven and has security performance. 2.Grammarthe script in the HTML must be between the tags. scripts can be placed in HTML pages in the and sections;most cases

ThoughtSort the array as a binary tree: Index 0 is the root node of the tree; Root node, the parent index of the node with index N is (N-1)/2; The index of the left child node of the node with index N is 2*n+1; The index of the

ThoughtThe idea of dividing the original array into smaller arrays (but not separating them as a merge sort). Main element selection: Selects an item from an array as a principal, usually the first item of an array, or arr[i]; or the middle

I learned about async and promise a long time ago, but always smattering.Today, when writing Nodejs, found a lot of third-party libraries using callbacks, so in the actual operation will appear multiple callbacks, this is the legendary JS callback