learn react js

= function (e) {this.momove (E)}.bind (this); This.moveTarget.onmouseup = function (e) {This.moup (E)}.bind (this); } Description:modown response to the left mouse button press operation, momove response to Mouse movement operation, moup response to mouse lift operation. In the momove added E.which judgment, E.which ==1 said the left mouse button press, this is to solve, the mouse can be dragged outside the range, and then moved back, without pressing the left button, drag elements will

() {}, the interface is prepared for the correct behavior to be available earlier.Use $ (document). Ready () {} is generally superior to the trial onload event handler, but it must be clear that attributes such as the height and width of the image are not necessarily valid at this time because the supporting files may not be home-finished.The onload event is usually written in the following form:function MyFunction () {//your code};window.onload = MyFunction;Or:Window.onload = function () {//yo

1: read a book to understand the concept!The purpose of this book is to have a basic understanding of js!This time should not be too long. Check the progress, days to a week!2: when surfing the Internet, pull the source code based on different page effects!Take notes! Build your own results! Common online knowledge must be the most important thing for JavaScript!3: when reading the source code, you should combine the books with Baidu to

other major banks.DD> DL> DL> DT>aOnClick= "Show (4)"href= "javascript:void (0)">Q: What is the payment method of insurance indemnity, surrender guarantee and insurance money?a>DT> DDID= "Deal4"style= "Display:none">A: Bank Transfer payment, you only need to provide a bank account at the time of application, you can easily collect insurance premiums, eliminate the risk of cash transactions. The banks that we can transfer paymen

keyword, so it is an anonymous function. function expressions, like other expressions, must be assigned before they are used.The form of the (1) function declaration is known as the function statement. A statement cannot begin with a function expression because the official syntax assumes that the statement that begins with the word function is a function statement. The workaround is to enclose the function call in parentheses.1 (function () {2 var hidden_variable; 3 /

the beginning of the design, in order to facilitate learning for beginners, does not require the use of VAR declaration variables. This design error has serious consequences: If a variable is used without a var declaration, the variable is automatically declared as a global variable:i = 10; // i现在是全局变量In different JavaScript files on the same page, if you do not have var to declare it, the variables i will be used, causing i the variables to interact with each other, resulting in hard-to-debug

Html>Head>Metahttp-equiv= "Content-type"Content= "text/html; Charset=utf-8 ">Title> Untitled Document Title>Head>Body>Imgsrc= "Img/0.jpg"/>Imgsrc= "Img/0.jpg"/>Imgsrc= "Img/0.jpg"/>Imgsrc= "Img/0.jpg"/>Imgsrc= "Img/0.jpg"/>Imgsrc= "Img/0.jpg"/>ScriptSrc= "Js/myjs_file.js" >Script>Script>var aimg = document.getelementsbytagname ("img");function showTime () {var myTime = new Date (); var iminutes = Mytime.getminutes (); var iseconds = Mytime.getseconds

page.You can use jquery to perform the first load$ (' a[data-toggle= ' tab "]). On (' Shown.bs.tab ', function (e) { e.target//This parameter enables you to get the tab information for activation E.relatedtarget The information of the tab before activating})[JavaScript]View Plaincopy Fade in effectFor each.tab-paneAdd to.fadeLets you have a fade-in effect on a tab. The content area corresponding to the first tab must also be added.inCauses the initial content to have a fade-i

I often use form validation at work, in the current company to do forms validation with the angular form component, for a pursuit of the front end, or application on the mobile side to write a form verification, the introduction of angular or jquery components, such as verification, will inevitably appear bloated, Preferably a native JS bar, light weight. Fortunately, until this lesson, plus the previous learning, slowly merge according to the require

property represents the function that created the object. Object.constructor//object is the name of the object or function. Description: The constructor property is a member of all objects that have prototype. They include all JScript intrinsic objects except the Global and Math objects. The constructor property holds a reference to a function that constructs a particular object instance. Example: X= newString ("Hi"); if (X.constructor== String)//processing (the condition is true). or function

1.push () and Unshift () returns the new array length after executing the methodWhen the pop () and Shift () methods are executed, the removed items are returned;Shift () Gets the first pop () to get the last itemPush () adds item unshift () from the previous Add itemMemorizing method: The letter is short is to take an item, the letter is long is added, pop () is shorter than push (), so is to take, learn from each other;Push () is added from the fron

participates in the argument:When a function is called, a copy of the function's arguments is copied to the formal parameter, and the number of the function's shape participation arguments can be different.var i= 0;function Getsum (a,b,c) {///in the definition of functions, the parameter used is called the formal parameter, the role of the position to occupyArgumentsA = a | | 0;b = B | | 0;c = C | | 0;console. log (A+b+c);}Getsum (10,20);//When the function is actually called, the incoming data

long as one boss + several core members. But this requires long-term cooperation in order to produce such a core of leadership.Soldiers are not more than the fine, this truth is difficult to understand before, and recently began to have a profound experience. A team of dozens of people, if it is a mob, is far from the efficiency of the lean team of 10 people.Increasing the number of people will increase the cost of internal communication. If the boss does not have a strong personal charisma and

Three is called as a constructor functionThe so-called constructor is to generate a new object by this function (object). At this point, this is the new object.　　function 　　Test () { this. x = 1; } varnew//The run result is 1. To show that this is not a global object, I make some changes to the code:　　var x = 2; 　　 function Test () { this. x = 1; } varnew//The run result is 2, indicating that the value of global variable x does not change at all.scenario four apply callApply () is a method

Today is the text value of the ComboBox to empty the problem of abuse, the following into the topic:Md.drugView.cleanSearch = function () {s = S1 = "";Md.drugView.datagrid.datagrid (' Load ', {});//reload the data without reading the data, the value passed to the background is emptyMd.drugView.searchform.find (' input '). Val (');//Find all the input tags under the Searchform form and empty};The above is the way to empty the values in all the input tags in the form, so the problem is, when we're

HTML+CSS Basics = Page Authoring + page Architecture= Product Front-end architectureGetting Started with JavaScript = JavaScript program programming + DOM programmingIMG Tag usemap use: http://www.blogjava.net/auditionlsl/archive/2009/05/26/278012.htmlUse of Label: Properties value Description For Id Specifies which form element the label is bound to. Form Formid Specifies one or more forms to which the label field b

Before due to Ben Wang's carelessness, resulting in the first phase of the code is missing, I'm sorry to everyone, here I put the code in full releaseWeb front end of the day to learn a little JS knowledge

IndexOf () The position of a characterSlice equivalent to a substring slice of stringA = [' A ', ' B ', [+] (5) ["A", "B", 1, 2, 3]a.slice (0,3) (3) ["A", "B", 1]a.slice (3 ) (2) [2, 3]Append pop () after push () is removed from the backA.push (' h ')7A (7) ["A", "B", 1, 2, 3, 4, "H"]a.pop ()"H"A (6) ["A", "B", 1, 2, 3, 4]Unshift () in front of add shift () to delete the previousA.unshift (7a) (7) [A, "a", "B", 1, 2, 3, 4]a.shift ()A (6) ["A", "B", 1, 2, 3, 4]A.sort () sortReverse ()

NPM: Nodejs Package Manager Express: Server-side more popular MVC framework, processing service requests, routing forwarding, logical processing Mongoose: MongoDB wrapper for easier database use http://Socket.io to implement a service-side and client socket communications solution backbone: Client MVC framework, writing client applications (watercress says) coffeescript: Improving the readability and robustness of JavaScript Zombie: Browser subset, writing HTML parser, light Ja

1. Since multiline strings are more \n cumbersome to write, the newest ES6 standard adds a multi-line string representation, using ' ... '`这是一个多行字符串`;2.字符串常见的操作如下：// 13要获取字符串某个指定位置的字符，使用类似Array的下标操作，索引号从0开始：s[12]; // ‘!‘s[13]; // undefined 超出范围的索引不会报错，但一律返回undefined3. It is important to note that the string is immutable, and there is no error if you assign a value to an index of the string, but it does not have any effect:var s = ‘Test‘;s[0] = ‘X‘;alert(s); // s仍然为‘Test‘4.JavaScript provides som