javascript coding interview questions

nested, must have root element, all XHTML elements must be nested within the root element5, to the Web standardization (or site reconstruction) know what the relevant knowledge, briefly describe a few of the Web standards you know?　　Web standardization is divided into structural standardization, performance standardization, behavior standardization. The structure standard language has XHTML and XML, the performance standard language CSS, the behavior standard language w3c,ecmscriptWeb standardi

configuration. While JavaScript is interpreted to perform without generating intermediate files, "read a sentence, execute a sentence", the execution can generally be done in three ways:1. The general browser comes with the JS interpreter, which can be used directly by the browser;2. Special interpreter software can be installed node. js, executing the. js file;3. Executed with the Web page, using the Third, the data typeJava is a strongly typed lang

. Conversely, when Getfullname () is assigned to the test variable, the context refers to the Global Object (window). This is because test is a property that is implicitly set to the global object. For this reason, the function returns the FullName of the window, that is, the value defined in the first row.Question 5:call () and apply ()Now let you solve the previous problem and make the final Console.log () print Aurelio De Rosa.　　ReplyThe problem can change the function context by forcing the

Questions about function call variables var a =10; function aaa(){ alert(a); } function bbb(){ var20; //10 } bbb(); Variable declaration issues function aaa(){ var a=b=10; } aaa(); alert(a);//not defined alert(b);//10 Variable lookup is the nearest principle to find, Var defined variables, when the nearest is not found, will look for the outer layer: var10 funct

JavaScript Interview Requirements: the following questions must be selected from one to four, three questions, implemented using native code, cannot be usedIn any framework, the fifth question is selected.1. display images in a fixed area of the page1. Each time you click the right arrow, the image area will scroll to

are not placed under the sub-domain name, but placed in a separate primary domain name. There is also a reason that the browser for a domain name will have a limit on the number of requests, this method can be convenient to do CDN.What are the states of the readystate of 23.ajax, and what are the meanings respectively?Ajax readystate A total of 5 states, respectively, 0-4, each of which means that the meaning of each number is 0 is not called the Open method, 1 means that the Send method is not

Topic:var array = [1, [2, 3, [4, 5,], 6], 7, 8];Write a method Flatarray (array), get [1, 2, 3, 4, 5, 6, 7, 8]Answer:1. Two force notation:function Flatarray (arr) { var temp = arr.join (). Split (', '), = temp.length, = []; for (var i=0; i) { Result.push (parseint (Temp[i])); } return result;}　2. Recursion:functionFlatarray (arr) {varresult = []; for(vari = 0, L = arr.length; I ){ if(Arr[i]instanceofArray) {Result=Result.concat (Arguments.callee (arr

Which of the following javascript interview questions have you done?1. -------------------------------------------------- copy the code var fun = function () {this. name = 'Peter '; return {name: 'jack'};} var p = new fun (); copy the code to ask p. name is: a: 'Peter ', B: 'jack', c: null, d: undefined 2. -------------------------------------------------- copy t

1.----------------------------------------------------var function () {this. Name = ' Peter '; return ' Jack '}; var New Fun ();Excuse me, p.name is:A: ' Peter ', B: ' Jack ', C:null, d:undefined2.----------------------------------------------------var function () {this. Name = ' Peter '; return ' Jack '; var New Fun ();Excuse me, p.name is:A: ' Peter ', B: ' Jack ', C:null, d:undefined3.----------------------------------------------------var function =' peter '}}varnew fun (); var New =

[Interview Questions] Android interview questions, questions android questions Android interview questions The

Summary of Java back-end development interview questions of major companies, and java back-end interview questions ThreadLocal (thread variable copy) Synchronized implements Memory sharing. ThreadLocal maintains a local variable for each thread. It uses space for time, which is used for data isolation between threads

. JavaScript Common objects6, commonly used in JavaScript value assignment method, for radio button, check box, such as the value assignment method. (Baidu can, JavaScript common basis)7, jquery value Assignment Basic method.8. Get the value of the radio button, get the value of the check box, get the value of the drop-down list, go to the value of the check box,

object change, the browser can automatically reproduce the image. Canvas Canvas uses JavaScript to draw 2D images.Canvas is rendered by pixel.In the canvas, once the image is drawn, it will not continue to get the attention of the browser. If its position changes, the entire scenario also needs to be re-drawn, including any objects that may have been overwritten by the image. Comparison between Canvas and SVG Canvas Dependency resolutionEvent process

10 most common HTML5 interview questions with answers, html5 interview questions with answers This article shares the 10 most common HTML5 interview questions. Question 1: What is the new HTML5 document type and character set? A

Web Front-end interview questions, web interview questions I 'd like to share with you some of my recent interview questions. 1.Understanding and understanding of WEB standards and W3C Tag closure, lower-case tags, non-chaotic nes

Unity comprehensive interview questions (including answers) and unity interview questions 1. What is a collaborative program? Enable another logic processing when the main thread runs to assist in the execution of the current program. The coroutine is like multithreading, but not multithreading, the Unity coroutine che

Spring Interview Questions and Answers, Spring interview questions Spring Overview 1. What is spring? Spring is an open source development framework for java Enterprise applications. Spring is mainly used to develop Java applications, but some extensions are used to build web applications on the J2EE platform. The Spri

C/c ++ common interview questions, interview questions 1. What is the role of static in C? (1) Hide. When we compile multiple files at the same time, all global variables and functions without the static prefix have global visibility. Therefore, we use static to define functions with the same name and variables with th

Android interview questions (3) and android interview questions 1. Describe the lifecycle of an Activity. Activity lifecycle methods include:OnCreate (), onStart (), onReStart (), onResume (), onPause (), onStop (), onDestory ();Visible life cycle: from onStart () to onStop () called by the System ()Foreground