Recently, the cock silk should be developed for the project needs to make a fully selected CheckBox function.
Oh, this is not very simple thing, a total of checkbox,n multiple child checkbox, the Total checkbox once selected, the Child checkbox is all selected, the total on
In JSP, there are several ways to express a checkbox, the two most common are:Where the When the checkbox is selected, the label is When unchecked, label JS use to obtain the length of the empty is not selected, and vice versa is selected.But if you use Spring 's tag library, for example There are also many checkboxes in the checkbox list, first, each
How does jquery obtain the attr (checked) of the checkbox is always a solution to the undefined problem?
Using jquery to determine whether checkbox is selected, you may think of the following method immediately:
$ ("# Phpernote"). attr ("checked ")
But today, I found that this statement always returns undefined, which
The jquery processing checkbox is not checked for different versions in each version.The checkbox operates differently in various versions of jquery. Summarized as follows:-Use the attr("Checked") method in jquery1.5 and the following versions:-Use the prop("checked") method
This example describes the solution that the checkbox in jquery repeatedly calls attr (' checked ', true/false) only for the first time. Share to everyone for your reference, specific as follows:
First look at the following code:
/**
* All select
/function Checkall () {
$ ("input[name=ids]"). attr ("Checked", true);
}
/**
* Do not select
/
functio
In response to the development requirements of the project, this diaosi needs to make a fully-selected checkbox function.Oh, huh ~~ Isn't that easy? A total checkbox, N multiple sub-checkboxes. Once the total checkbox is selected, all the sub-checkboxes are selected. Once the total is not selected, all the sub-boxes are not selected.With this small demand, I have
The jquery1.10 used in the project today needs to detect the selected state of a checkbox and take it for granted. attr ("Checked"), the result is that the value is undefined undefined regardless of whether it is selected or not.Reason: this has been modified in the jquery1.6 version:The checked property is initialized when the page is initialized and does not ch
Jquery1.6 + get the checked attribute of the checkbox is always undefined, jquery1.6checked
Jquery1.10 used in the project needs to check the selected status of a checkbox today. It is assumed that it uses. attr ("checked"). The result shows that this value is undefined regardless of whether it is selected or not.
Ca
The checked attribute cannot be correctly implemented in IE. in IE, when using checkbox or radio, you may find that the CheckBoxObject cannot be used sometimes. checked = true or CheckBoxObject. the setAttribute ('checked', true) method causes the checkbox or radio to be pre
This is depressing. When I wrote this function today, I found a problem. I checked a lot of information on the Internet, and I was even more entangled in facts. I tested it N times, I found that the online statement and my previous understanding are both incorrect.
Let's take a look at most of the online documents.
The Code is as follows:
Something about others:Jquery checks whether checkbox is selectedI
The jquery-1.10.2 used in the project need to detect the selected state of a checkbox and take it for granted. attr ("Checked"), the result is that the value is undefined undefined regardless of whether it is selected or not.To find information, we hereby record:JQ Official Website Description:As of the jQuery 1.6, the. attr () method returns undefined for attributes that has not been set. In addition,. att
In jQuery, checkbox repeatedly calls attr ('checked', true/false). Only the solution that takes effect for the first time is jqueryattr.
The example in this article describes how checkbox repeatedly calls attr ('checked', true/false) in jQuery to only take effect for the first time. We will share this with you for you
$ ("input"). attr ("checked"); type= "checkbox" value= "1"/>This is a little problem today.And then always output undefined and checked;Checked it out a lot, and didn't find any problems.And then find the information on the Internet, mostly.if ($ "#xxx". attr ("checked")
Tag: Gets the value of the checked checkboxIdea: Use the Name property value to get the CheckBox object, and then loop through the Checked property (true indicates that it is selected, False indicates unchecked). The following example shows:1. HTML structure2. JavaScript codefunction Fun () {obj = Document.getelementsbyname ("Test"), Check_val = [];for (k in obj)
First we have to know, checkbox if selected in JS is document.all[' Titlebox '].checked can be, the following I give you an example.
Cases
The code is as follows
Copy Code
function AddTitle (){if (document.all[' Titlebox '].checked){document.getElementById (' Ititle '). style.display= ' block ';}Else{document.getElementById (' Ititle
Ideas:Get the node with JavaScript DOM manipulation, get its properties, get the ID of the class to get the string, send to the background, intercept string, get the list of the class.It is important to note that:Don't know why Getilementbyid ("id"). getattribute ("value") Gets the Value property. So choose Getilementbyid ("id"). getattribute ("title") to get the property written in title.Specific implementation:List is a list of XMDJ entity classes coming from behind the scenes.form> label>P
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