dont know js

one of the most important best practices in Web performance optimization is reducing HTTP requests. The most important way to reduce HTTP requests is to merge and compress JavaScript and CSS files. When writing CSS, we should pay attention to some details to control the size of the CSS file, such as: Global style, inheritance style, abbreviation style, space, comments, etc., you can also use the online tool to compress your CSS file to reduce the size of the CSS file, but the compressed CSS file

Objective:The function is divided into a parameter with a return value, a parameter has no return value, no parameter has no return value, and no parameter has a return value; So what about the function you want to use without parameters? What if you want to encapsulate a code that implements a variety of functions, but the parameters are larger than the arguments or the arguments are larger than the formal parameters? In this paper, some related operations about parameters, such as value passin

ObjectiveHere is a record of their own reading you don ' t know JS series of some experience, but also JavaScript a summary of their knowledge of it. High-Energy warning: the article is longer and trivial, please bring your own bench melon seeds ~Types (Type) Variables don ' t has types, but the values of them do. The meaning of this sentence is: there is no type of variable, the value stored

Recently in writing a small JS, think of n times, also changed n times, later do not know why, the effect on the realization, and then re-read the code, exclaimed: This is the original.So do you think this code is written by yourself?I think so, and I think it's not.The reason: The program itself is through their own continuous and slowly groping, from the wrong to come out;Not the reason: The program was n

I don't know how to pass the php array to js lt ;? Php $ webdata [a] 111; $ webdata [B] 222; $ webdata [c] 333; $ webdata [d] 444; echo nbsp; $ webdata ;? Gt; lt; script nbsp; typetextjavascript gt; nbsp; do not know how to pass the php array to js $ Webdata [a] = '20140901 '; $ Webdata [B] = '20140901 '; $ Web

/loop Loop statement = + block (statement block) + Scope　　We often need to group a series of statements together and which we often call a block.{ = a. = Amount; Console.log (amount);}This kind of standalone {:} general block was valid but was not commonly seen in Js programs. Typically, blocks is attached to some and other control statement, such as an if statement or a loop.ClosureYou can think of closure as a by-remember and continue to a

The case address is www. cndf. comorderprice. php. First, I want to know how to calculate the price automatically using several options. By viewing the html, I learned that the {code...} role of this js file, I tested, the source site offline is unable to calculate the results,... case address http://www.cndf.com/order/price.php First, I want to know how to calc

internet giants, including Facebook, Google and Twitter, have adopted the same technology as meteor in Web applications, the meteor team said. (Project details) Project home: http://meteor.com Code Escrow Address: Https://github.com/meteor/meteor Jqueryjquery is another excellent JavaScript framework following prototype. It makes it easy to manipulate document objects, handle events, animate, use Ajax to interact with websites, and more. Provides APIs that can be used

CSS3 Transition attribute transition, at the end of the animation, there is also an end event: webkittransitionend;Note: Transition, there is only one event.Http://www.runoob.com/jsref/event-transitionend.htmlVuejs Code Snippet:SetTimeout (() = { This. Wrap.classList.add ('swipe-transition'); This. Swipemove (- This. Index * This. PageWidth); Once ( This. Wrap,'Webkittransitionend', _ + = { This. Wrap.classList.remove ('swipe-transition'); //code for Li Chian-hung notes//this.

Tip 1: Use El.contains (e) To determine the area of the clickTip 2: Use MouseUpTip 3: When you are done, remove the eventShowpopover (e) { This. PopOver =! This. PopOvervarClosepopover = (Event) = { if(! This. $refs. PopOver.contains(Event. Target)) { This. PopOver =falseDocument.body.removeEventListener ('MouseUp', Closepopover)} } document.body.addEventListener ('MouseUp', Closepopover)} Warm know new

In JS, the syntax for creating a function object is var myFunction = new Function (arg1,..., agrn, body);where the n parameters of the function object are placed in front of the body of the function body parameter, that is, the function body parameter must be placed at the end of the parameter list, or there can be no parameter new function (body).If you add a third parameter to the last, then "alert (x+= ' aasf ')" will be passed into Func as a param

Object inheritance Inherit var o = {r:}; var c = function f () { }; C.prototype = O; C.R =; Alert (O.R)//The inherited property value has not changed.alert (C.R);//c in R overwrites the properties in O. How do I call the R property in O? var o = {r:}; var c = function f () { }; C.prototype = O; Alert (O.R)//The inherited property value has not changed. alert (C.R);//Query R property, return undefined value. Calls should be made using prototypes. The above is a small set to intr