[英]How to use localstorage to store all checkbox boolean values in a list to an array?
The code looks like this: 代码如下:
<div id="list">
<input type="checkbox" id="1">
<input type="checkbox" id="2">
<input type="checkbox" id="3">
</div>
In another html pane (a separate template), I want to store all those checkbox ( checked
/ unchecked
) booleans into an array. 在另一个HTML窗格(一个单独的模板)中,我要将所有这些复选框(
checked
/ unchecked
)布尔值存储到一个数组中。 What I did looks like: 我所做的看起来像:
var array = [];
var checkboxli = document.getElementsByTagName("input");
for (var i = 0; i < checkboxli.length; i++)
{
array.push($("#input.prop('checked')"));
}
However, this doesn't work. 但是,这不起作用。 I have other templates using tag name "
input
", so I need to limit the tag name to the ones under "#list"
id (some sort of css selector perhaps). 我还有其他使用标签名称“
input
”的模板,因此我需要将标签名称限制为"#list"
ID(可能是某种CSS选择器)下的标签名称。 Currently, both document.getElementsByTagName("input")
and $("#input.prop('checked')")
won't work. 目前,
document.getElementsByTagName("input")
和$("#input.prop('checked')")
无法使用。 There might be other syntax problems. 可能还有其他语法问题。 Please help me resolve.
请帮我解决。 Thanks.
谢谢。
EDIT: It seems like I didn't communicate my intention well. 编辑:看来我没有很好地传达我的意图。 Here is what I want to get out of the list: An array that looks like
这是我想从列表中删除的内容:一个看起来像的数组
[true, false, true, true, true...]
in which each boolean value represents whether the corresponding input checkbox is checked or not. 其中每个布尔值表示是否选中了相应的输入复选框。
Since your are already using jquery, you can go like this: 由于您已经在使用jquery,因此可以这样进行:
Assuming this HTML 假设这个HTML
<div id="list">
<input type="checkbox" id="1" checked="checked">
<input type="checkbox" id="2">
<input type="checkbox" id="3" checked="checked">
</div>
And this script: 这个脚本:
var array = [];
$("input[type='checkbox']","#list").each(function(){
array.push($(this).is(":checked"));
});
You would get something like this: 您将获得如下内容:
array = [ true, false, true ];
Instead of: 代替:
var checkboxli = document.getElementsByTagName("input");
you can use: 您可以使用:
var checkboxli = document.querySelectorAll("#list>input[type=checkbox]"); //array of checkboxes
now you have all of the checkboxes under the list element. 现在,您具有所有在list元素下的复选框。
if you want only the checked checkboxes you can use: 如果只需要选中的复选框,则可以使用:
var checkboxli = document.querySelectorAll("#list>input[type=checkbox][checked]");
Try below code. 尝试下面的代码。 It retrieves all
IDs
from all checked
check-boxes
, stores in an array
and then stores in local-storage
as an string
: 它从所有
checked
check-boxes
检索所有IDs
,存储在array
,然后作为string
存储在local-storage
中:
var itemsChecked = [] ;
$('input[type=checkbox]:checked').each(function(index, item){
itemsChecked.push($(item).attr('id'));
})
localStorage.setItem('selectedItems', JSON.stringify(itemsChecked));
Later, to retrieved data from localstorage, use the following: 以后,要从本地存储中检索数据,请使用以下命令:
var items = JSON.parse(localStorage.getItem('selectedItems'));
// returns array of IDs
A more suitable approach would be to capture the XPath of each element starting from the body. 一种更合适的方法是从主体开始捕获每个元素的XPath。 You could use a getPath jQuery plugin, Thus you won't be dependent upon a specific string like the List.
您可以使用getPath jQuery插件,这样就不会依赖于诸如List之类的特定字符串。
jQuery.fn.extend({
getPath: function( path ) {
// The first time this function is called, path won't be defined.
if ( typeof path == 'undefined' ) path = '';
// If this element is <html> we've reached the end of the path.
if ( this.is('html') )
return 'html' + path;
// Add the element name.
var cur = this.get(0).nodeName.toLowerCase();
// Determine the IDs and path.
var id = this.attr('id'),
class = this.attr('class');
// Add the #id if there is one.
if ( typeof id != 'undefined' )
cur += '#' + id;
// Add any classes.
if ( typeof class != 'undefined' )
cur += '.' + class.split(/[\s\n]+/).join('.');
// Recurse up the DOM.
return this.parent().getPath( ' > ' + cur + path );
}
});
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