javascript missing manual

externally) through the secure implementation of the protection variablesPrivate properties and methods cannot be accessed outside of constructorfunction Constructor (...) {var = this;var membername = value;function MemberName (...) {...}} The above 3 points are the most basic application scenarios for closures, and many of the classic cases originate from this.V. JavaScript's garbage collection mechanismIn JavaScript, if an object is no longer

Full manual text for JSON Learning Chapter 1 What is JOSN JSON: JavaScript Object Notation It is a data structure that describes object data (various metadata is actually the simplest object) in Javascript (such as jscript and ECMA Javascript. The concept and usage are similar to Hash (Hash table) or associated array

key of a keyboard is pressed 1 4 3 onkeypress Key of a keyboard is pressed or pressed 1 4 3 OnKeyUp The key of a keyboard is loosened 1 4 3 OnLoad A page or image is finished loading 1 2 3 OnMouseDown A mouse button is pressed 1 4 4 OnMouseMove Mouse is moved 1 6 3 onmouseout The mouse moves aw

); Returns 2parseint ("10", 8); Returns 8parseint ("10", 10); Returns 10If the decimal number contains a leading 0, it is best to use cardinality 10 so that the octal value is not unexpectedly obtained. For example:parseint ("010"); Returns 8parseint ("010", 8); Returns 8parseint ("010", 10); Returns 10The Parsefloat () method is similar to the parseint () method, viewing each character starting at position 0 until the first non-valid character is found, and then converting the string before the

(beginning of letter, allow 5-16 bytes, allow alphanumeric underline): ^[a-za-z][a-za-z0-9_]{4,15}$ Match domestic phone number: (d{3}-|d{4}-)? (D{8}|d{7})? Matching Tencent QQ Number: ^[1-9]*[1-9][0-9]*$Application in JavaScript Calculates the length of a string (a double-byte character length meter 2,ascii character 1) The code is as follows Copy Code String.prototype.len=function () {return This.replace ([^x00-xff]/

{validate: True, limit: 5, name: "bar "}You can use the following function to test$ (Function (){ VaR settings = {validate: false, limit: 5, name: "foo "}; VaR Options = {validate: True, name: "bar "}; $. Extend (settings, options ); $. Each (settings, function (I) {alert (I + "=" + This );}); }) $. Grep (array, FN) uses the FN function to filter the array and transmits the elements in the array to FN in sequence. FN must return a boolen. If FN returns true, it will be filtered.$ (Function (){

, the settings object is {validate:true, limit:5, Name: "Bar"}You can use the following function to test$ (function () {var settings = {validate:false, limit:5, Name: "foo"};var options = {validate:true, name: "Bar"};$.extend (settings, options);$.each (settings, function (i) {alert (i + "=" + This);});})$.grep (ARRAY,FN)By using the function FN to filter the array, passing the elements in the array to FN,FN must return a boolen, such as FN returns True, will be filtered$ (function () {var arr=

. The first element to add to the array.Newelement2 is optional. The second element to add to the array.Newelementx is optional. You can add multiple elements.Return value: The new length after the specified value is added to the array.Description: The push () method adds its parameter order to the tail of the arrayobject. It modifies the arrayobject directly, rather than creating a new array. The push () method and the Pop () method use the advanced post-stack functionality provided by the arra