JavaScript

If you are used to using new to instantiate an object, you may be confused in js. The number of optional parameters represents a different meaning. New Array (size); // when a parameter is passed, the size is the length of the table Array in the

Hide buttons in the upper-right corner of a webpage If you do not need to share a page, you can use JavaScript code to hide the buttons in the upper-right corner of the page. Interface call code

Example of Selecting All check boxesCopy codeThe Code is as follows: Function selectAll (form ){Var obj = document. getElementsByName ('selectall ');Var cks = document. getElementsByTagName ("input ");Var ckslen = cks. length;For (var I = 0; I If

Today, we have written a function to select and cancel all options:Select All: $ (": checkbox"). attr ("checked", "checked ");Deselect all: $ (": checkbox"). removeAttr ("checked ");Get the selected: $ (": checked [checked = 'checked']")You can

I searched for a long time and found some examples, because I am a beginner and I do not know how to use them ..After studying the source code, we finally achieved the basic download. Fixed a small BUG where a table cannot be repeatedly downloaded,

Create a grid today. The data in the grid needs to be detailed. Think about table nesting! View For each record in the grid, click the plus sign on the left to expand a detailed sub-table. All data, including column names, is obtained from the

Add jquery files for debuggingCopy codeThe Code is as follows: -select- "> year -select- "> month -select- day

Bootstrap learners must meet the following requirements: [1] basic knowledge of common xhtml labels [2] basic knowledge of xhtml + css layout [3] basic html5 + css3 knowledge ============================================== Necessary software: [1

1. All Angular controls and source codeHttps://github.com/angular2. Angular api docHttps://code.angularjs.org/1.2.9/docs/api3. Use AngularJS to develop next-generation Web applications (English)

Do you know what the following JavaScript code will output during execution? Copy the code var foo = 1; function bar () {if (! Foo) {var foo = 10;} alert (foo);} bar (); copy the code and answer "10". Are you surprised? The following may surprise

1. Clear floating or close floating? Many people have used to call it "Clear floating". I used to call it this way, but it is not accurate. We should treat code with a rigorous attitude, and help us better understand the three problems at the

Copy codeThe Code is as follows:

For how to set the default parameter values for functions in Javascript (js), the following methods are provided for reference. Method 1: Function example (a, B) {var a = arguments [0]? Arguments [0]: 1; // set the default value of parameter a to

Use the original JavaScript syntax to delete html document nodes. For detailed operation methods, see the following two cases: untitled document 1 2 3 clear node content 1 2 3 clear node content  Articles you may be

This is a very practical piece of code. when the project is finished and launched, we usually disable all program errors, but the traces need to be wiped quickly. The Javascript error message is also worth disabling, how can I disable js script

Javascript allows you to instantly display uploaded thumbnails and record them here for future use! Note that only javascript is used to achieve this effect, that is, after you select the file to be uploaded, you only need to call the local file

How does javascript determine whether an object exists? The Code is as follows: If (typeOf (x) = 'undefined') {alert ('undefined');} else if (typeOf (x) = 'null ') {alert ('null ');} Or simply, the usage is If (! Variable ){}Articles you may be

How does one know the last modification time of a page file? In addition to right-clicking the file to view the attributes, you can also use JavaScript to display the last modification time of the file. The specific code is as follows. You only need

To implement the page printing function. This requirement often sounds complicated and advanced, but it is not that difficult. Next I will share a simple method to implement the page printing function, which not only prints the entire page, you can

JavaScript is an explanatory language. Unlike java, C #, and other programming languages, it is compiled and run by the compiler first, but directly downloaded to the user's client for execution. Therefore, the advantages and disadvantages of the