JavaScript native does not support namespaces and needs to be implemented in a workaround.
Namespaces are important when we create a JavaScript library, and we can encapsulate the fragmented JavaScript file (*.js) that makes up this JavaScript
JavaScript to achieve the effect of the shopping cart, of course, this effect can be used in many places, such as the choice of friends, Human resources module, calculate salary, personnel selection and so on. Here's a look at some kind of a
Background: In the standard method of the array object in JavaScript, there is no indexof () method, which can be extended through the following code.
Copy Code code as follows:
if (! ARRAY.PROTOTYPE.INDEXOF) {
Array.prototype.indexOf =
Recently made a simple settings page, because you need to restart the device function, so I want to add a countdown to the window interface.
The idea at first was to customize an alert window, but soon found that alert would be parked there waiting
The interaction of Web pages is becoming more and more complex, and the asynchronous operation of JavaScript is more and more. such as the common Ajax request, need to respond when the request completes, the request is usually asynchronous, the
RemoveChild (a) is used to remove an existing element from a document
Parameter A: The node to move out
Copy Code code as follows:
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var odiv = document.getElementById ("Guodiv");
var firschild = Odiv.firstelementchild? ODiv.
The Promise programming model is also known as thenable, which can be understood as deferred execution. Each Promise has a unique interface called then, which is invoked when Promise fails or succeeds. It represents a result of an operation that may
Copy Code code as follows:
insert title here
The object itself is passed as a parameter to manipulate it. -->
Please select Province
Anhui
Hebei
Henan
Please select City
Copy Code code as follows:
javascript Module Free Drag
heading 1
splendida porro oculi fugitant vitantque tueri. Sol Etiam caecat, contra si tendere pergas,propterea quia vis magnast Ipsius et altea?ra per purum
Events are always one of the most powerful objects in JavaScript. JavaScript provides AddEventListener and attachevent two methods for binding events for DOM nodes, and jquery is further encapsulated to provide a BIND method compatible with each
Several giant companies, Facebook and Netflix, have decided to prohibit users from executing JavaScript commands in the console (console).
Initially this was started by Facebook to prevent malicious users from executing specific command-mongering
The sting string object is one of the built-in objects provided by JavaScript.
Note here that the first character in the string is the No. 0 digit and the second is the 1th digit.
1. How to create a string object
[Var] String Object Instance name
We often use this same logic to determine whether a string or number is in an array, and many programming languages have such a special function, such as PHP's In_array (). Then JS has wood there, unfortunately, JS Wood has such a function, so think
To the weekend, tomorrow should be summed up, feeling learned something, and feel not to learn how many things, concrete tomorrow to analyze it, first to look at today to analyze the problem.
This picture is familiar to us all:
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Page of the IMG element, want to get its original size, take the width as an example may be the first thought is width, as follows
Copy Code code as follows:
The Getwh method used here is mentioned in the previous article.
This code in IE9, Firefox, Chorme, Safair test shows no problem, to the table to add some simple style, basic functions can be achieved, there are a few problems to be improved!
The effect chart is as follows:
Here's the code:
Copy Code
Analysis
JavaScript has only one numeric type number, and all numbers in JavaScript are represented in the IEEE-754 standard format. The precision problem with floating-point numbers is not JavaScript-specific, because some decimal digits are
The benefit of this is that internal functions can access parameters and variables that define their external functions.
First, let's construct a simple object.
Copy Code code as follows:
var testobj = {
Value:10,
Add:function
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