JavaScript

Definition and usage1. The split () method is used to split a string into an array of strings.Tip: If you use an empty string ("") as a separator, then each character in the Stringobject will be split.Note: the Split () method does not change the

In JavaScript, arrays are also classes, so you can instantiate an array object with the following codevar Myarr = new Array ();After instantiating, add an array element, such as the following code:myarr[0]=1;myarr[1]= ' test '; myarr[' both

Switch (){Case}Infinite loopsFor (four elements: initial conditions, cyclic condition/judging condition, state change, loop body){Loop body}　　A=1 a loop 10 times last less than or equal to 10Break jumps out of the loopContinue jump out of the

Chapter I JavaScript manipulating BOM objects one. Window ObjectThe browser object model (BOM) is one of the components of JavaScript that provides an object that can be exchanged independently from the browser window, using the browser object model

One problem with missing VAR:This is not a standard notation! Do not recommend usingBut the effect is still out, why?Reason:Https://zhidao.baidu.com/question/1637589020484843580.htmlWhy the object can be accessed directly by ID, because all element

Common password input box when the input character will be replaced by the ' * ', and there will be a small eye to see the original character, although the input tag has this function, but this is only when they are looking at the regular expression

The Document object is part of the Window object and can be accessed through the Window.document propertyUsually through the JS can manipulate HTML elements, first of all to find this element; By using the getElementById ("id") method//id

To this day, it should be spent more than one months, and finally finished the DOM programming art (Appendix did not see), the above all the code is generally understood, because the book itself is relatively basic, not as authoritative and

DOCTYPE HTML>HTML>Head>Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8">title> Auto Growth Timertitle>Scripttype= "Text/javascript"> varAtime; functionclock () {var Time=NewDate (); Atime=time.gethours ()+":"+time.getminutes ()+":"+

1. Create and add ELEMENT nodes ul id="ul"> li>1li> li>2li> li>3li> ul> script> var parentElement = document.getElementById("ul"); var NewNode= document.createElement("li"); NewNode.innerText="AddNode";

The concept of a linked listA linked list is a common data structure. It is a structure for dynamic storage allocation. The list has a "head pointer" variable, which, in head, holds an address that points to an element. Each node uses an object's

1. Function parametersvariable parameter (indeterminate parameter): variable number of arguments parameters, example of parameter array 1. Sum of all parameters Untitled document View CodeExample 2:css function to judge arguments.length parameter

Http://www.jb51.net/article/68285.htmWork often creates a function to solve some requirements problem, the following is the individual in the work summed up the creation function 20 ways, you know how much?function SayHello () { console.log ('

1. A complete JavaScript implementation consists of three parts: the core (ECMAScript), the Document Object Model (DOM), and the browser object model (BOM), ECMAScript is the standard rules such as syntax, type, statement, keyword, reserved word,

Objects are data that have properties and methods.In JavaScript, everything is the object. Array, function, string ...Definition and access to objectsIn JavaScript, we can use dots (.) and square brackets ([]) to access the object, and there are

Const DIFFTEXTCOUNTFONTSIZE = (StrText, boxwidth) + = {Let textLength = strtext.length;Let L = 0;For (const I in StrText) {if (Strtext.charcodeat (i) > 255) {L + = 1;}}Const NUMLENGTH = textlength-l;if (L > 0) {if (numlength% 2 = = = 0) {TextLength =

Single page operation, inevitably there will be a variety of JSP nesting problems, an operation page may involve dozens of or even hundreds of JSP pages.Usually we use the introduction of the JS file, will be placed in the header of index.　　But

CSS3 learning-use CSS to create a three-dimensional navigation bar and css3css navigation bar CSS stereo navigation homepage profile portfolio blog resources contact me : 1 2   Summary: 1. unordered list is used

CSS 3 creates small arrows common in web pages and CSS 3 creates web pages. /* Css3 triangle (up ▲ )*/ Div. arrow-up { Width: 0px; Height: 0px; Border-left: 5px solid transparent;/* Right transparent */ Border-right: 5px solid transparent;/* right

Cross-origin vue Solution Vue cross-origin Solution In a vue project, if cross-origin is not set in the background when a data request or submission is made between the frontend and backend, the front-end will report "No 'access-Control-Allow-origin'