Best Way To Store Data In HTML Elements
Sep 30, 2011
I've gone back and forth on the best way to store data in HTML elements which is used to support JavaScript. For instance, I might have a bunch of rows each associated with a SQL ID, and upon clicking the delete element, want to grab the id, and send it to the server. I've successfully used the following three solutions, but would like to standardize on just the best.
Option 1 is technically valid, but seems excessive. Option 2 will work fine, but is considered by some as bad practice. Option 3 requires the extra step of splitting the ID from some identifier string, and care not to have the same record twice on the page.
HTML Code:
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Jun 1, 2011
I am developing a web application in java (jsp's and servlets). For the project I am working on I will need to develop an html data entry screen and the code to load data into the screen, and then save the data back to the back-end database.
How to do the following:
Read the data out of the database (JDBC, no problem) in a servlet.
Put the data into the appropriate form for returning to the data entry screen, which will be a jsp. (Is JSON the right choice for passing the data from the servlet to the jsp?)
In the jsp, parse the returned data and populate the HTML form elements (text fields and combo boxes). When a button is clicked, pull the data out of the form elements and return to a servlet for saving back in the database.
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Apr 15, 2010
var object={
object.details member Value Can I store 10MB data?
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Mar 21, 2011
I have a project that I need to read some data from an XML file.
Something like:
However, since JS is a client side script so it can't read from client side, is there any alternate way to do this? I am thinking to create a "Data" class, and many "Data" objects, is this an elegant way to do it?
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May 2, 2010
I am trying to use jQuery AJAX. What my requirement is, i wish to load user names from DB in dataset, convert it to JSON format and store it in memory or using jQuery data for use while a user is browsing my site, i.e for a session. This way I can use autocomplete or my own code to display data to user.
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Jan 25, 2010
My table is a data table, and I'm contemplating using it as the data store as well, rather than keep a js array of data separately. The cell values are retrieved by ajax, then inserted into the table. I'm thinking that the duplication of data (once in the js array, once in the table) is likely to lead to strange results somewhere along the line, where the two data sets get out of synch. It seems to me that jquery makes using a table in this way rather simple (I refer to the jquery selectors in particular). The table includes some editable-in-place columns.
If any such edits, and user presses a Save button above the table, the save function finds the edited fields and sends an appropriate ajax call, then refreshes the table with the outcome (eg it worked, so new values remain shown, it didn't work, revert, or something like that, it's not too important here). Hence the need to maintain some 'awareness' of the values in the cells. I'm content with using attributes as needed to support this (e.g., to be able to revert to original value, to mark cells that have been edited). Table may contain up to 500 rows, ten columns. How it compares with keeping the data in a js array?
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Mar 11, 2009
How do I store array of data from Java into JS' array? I've tried the following, but the output is the last row's data (from the DB) code...
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Feb 4, 2010
I am using jquery to make a dialog box that take user info. I want to store that info and upload it to an sql database later. So far this is what i have.
<code>
When i run this i get:
Control 'ctl00' of type 'HiddenField' must be placed inside a form tag with runat=server.
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Apr 1, 2011
How to store login data into cookies by using JQuery ?
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Jul 21, 2009
I wanted to define additional attribute to a tag to manage information. I realized that XHTML might not like it and discovered the data(name,value) function. I was wondering how I could retrieve all tags e.g. "div" that have that data variable set.
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Nov 8, 2010
I have a simple count-as-you click button form, and this is what I want to do with it:
Click the button (however many times) to get the sets of numerical data.Take those numbers into a cookie, and be able to add/subtract to each number as i use the form again; and update the cookie. I need a way to be able to do this multiple if not an infinite number of times!
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Dec 13, 2011
I've been using localStorage to store a large amount of data (> 5mb). I know that most browsers limit localStorage to 5mb. However, on the specification site it states,
Quote:
User agents may prompt the user when quotas are reached, allowing the user to grant a site more space. This enables sites to store many user-created documents on the user's computer, for instance.
Is this available yet? If so, how would I use it?
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Sep 28, 2010
I want to be able to send data store in JavaScript variable to my email account.
I have tried using mailto: command and for some reason it doesn't work.
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Sep 16, 2005
I want to store the main content of my site (with it's HTML) in an XML file such as:
<?xml version="1.0" encoding="UTF-8"?>
<root>
<data>
<h3>Hello World</h3>
<p>Here is some content, blah...</p>
<p>Yet another paragraph</p>
</data>
<data>
<h3>Section 2</h3>
<p>More stuff to read</p>
</data>
</root>
And I want to load all the HTML in a data node via an onclick event. I've got the following basic AJAX code:
<script type="text/javascript">
<!--
function ajaxRead(file,node) {
var xmlObj = null;
if(window.XMLHttpRequest) {
xmlObj = new XMLHttpRequest();
} else if (window.ActiveXObject) {
xmlObj = new ActiveXObject("Microsoft.XMLHTTP");
} else {
return;
}
xmlObj. {
if(xmlObj.readyState == 4) {
var parentNode;
parentNode = xmlObj.responseXML.getElementsByTagName('data')[node]
updateObj('xmlObj', parentNode.firstChild.data);
}}
xmlObj.open ('GET', file, true);
xmlObj.send ('');
}
function updateObj(obj, data) {
document.getElementById(obj).innerHTML = data;
}
//-->
</script>
If I remove the HTML tags within the data node it works, but obviously there is no formatting, and its just all text. How can I load the HTML content into the div? Note: 'xmlObj' is the name of the div I'm trying to populate.
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Jun 6, 2010
I want to store the sourcepage of a html page in a variable; how can I do this? this page is not the one who contains the script, the page is delivered by a textbox
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Feb 14, 2011
I'm currently trying to create a script which can grab the HTML from a web page and store it. For example, if I want to use google and search for the term "dogs", I want to be able to access that information.
How can I implement this in JavaScript, if at all?
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Mar 21, 2011
I have written the code below. What it is supposed to do, is grab the HTML from a .NET panel (div) and make the changes and store them in a textbox, so that when the page is posted, the values are retained and can be re-read back to the .NET panel. I have found this script works in IE but doesn't work in FF. Now I know it is something I am doing wrong, but I can not work out what it is.
Code:
I have checked my syntax and I am sure it is correct. The only thing I can see that might be causing the problem is that I set final as the original and then I get the list of inputs.
From there I loop through and set the value of the inputs to the new values.
If I do an alert, the value shows what I would expect, but setting the store value as the final innerHTML doesn't appear to keep these values.
Could it be that once I pull the inputs from the final (placeholder = final.getElementsByTagName("input");) then changes I make to them do not affect the final variable?
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Jul 10, 2011
I want to store some custom property in HTML element directly, like this:
[Code]...
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Oct 16, 2009
Lets say I wanted store a long string of text into a local storage member on a browser using javascript.
window.localStorage.setItem("key",longStringText);
Now lets assume that the text itself contains characters outside of the normal ISO-8859-1 character set (like asian or russian characters). Would the individual char values be stored as one byte or two bytes?
"hello" -> 5 * 1 bytes = 5 (normal 8859 character sets)
"hello" -> 5 * 2 bytes = 10 (unicode or an extended character set size).
Is ISO-8859-1 still stored like ASCII once was as 8 bits? Or is it 16? If I was to use a 2 byte character set then would that cut the size of my allocated local storage space by half?
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Jun 3, 2010
I have HTML tags stored in XML. I want to be able to use these HTML elements with Javascript, just as you can with elements in document.body. How can it be done? (And don't try and tell me I should use server-side because I have written it all for Javascript and the project is nearly complete minus this and there are practical reasons for not doing this server-side. After all, anything is possible with Javascript!)
Let me explain:
- I have HTML templates such as this [URL]
- I want javascript to populate these templates then add them to my page
- The only way I know javascript can get this kind of data is by parsing XML
- I want to parse the XML then be able to use the HTML elements just like those in document.body
- As far as I'm aware, XML is the only good way of storing data for javascript. I don't want to store it in javascript variables (too much multiline data with " and '). Nor do I want to build it using document.createElement("div")... etc
As someone not yet with any experience in computer science etc, please ignore my poor terminology! However, I'm not a beginner when it comes to javascript.
Here's the script concerned but I doubt it'll help you understand my problem: [URL]
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Aug 5, 2011
I have an object with a single Method to load content from a xml file. The problem is... how do I add a property to the object to store the data loaded?? I tryed adding a simple Array inside the object, but didn't work.
[Code]...
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Feb 6, 2011
I have an unordered listWhen clicking one of them, I want to do somethingEasy so far.Now, I also want each list element to have some unique data associated with it so my JavaScript could treat each list element individually.As I see it, my options are:Add a custom non-sanctioned attribute to the LI element (probably not a good idea).Add an ID to each LI element, and name the ID such that the data can be extracted (also, probably not a good idea).Add a hidden input in each LI element and store the data there (seems like there's got to be an easier way).
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Jan 11, 2012
I was wondering if there way a way to loop through elements that contain a data key applied by data(). I couldn't find a selector for data keys.
This for instance, I would like to give me the value of 'foo' for where ever it has been applied.
$(document).ready(function() {
$('body').data('foo', 52);
$('head').data('foo', 32);
});
[Code].....
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Aug 19, 2010
This div is the only div. Inside it has images that are clickable. I want to be able to first grab the left position of the elements and when they like a left arrow want to take this left number value and subtract it by a number and if the the right arrow is pressed then it will add a number to the left number value.Is this possible and if so how can I do this? I am guessing i can use the .css with the .child in jquery.
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Sep 21, 2009
I want to initialize an array with "myString.length" elements, and I want every element to be prepopulated with "*" instead of blank. [code]...
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Sep 11, 2010
I have a html file that I want to load, loop through the json data and for each json entry I want to add a new block of the html and insert the json data into the matching div/class of the html. json looks like this:
{"Super" : [{"Name" : "John Doe", "Age" : "30"}, {"Name" : "Jane Doe", "Age" : "40"}]};
html looks like this:
<div class="Name"></div><div class="Age"></div>
So for each json entry of name/age, I want to insert that into the html, and then add another row, until all json data has been fetched. After this I want to insert all of this into #box, which is just a divthat should contain that html. Looping like this obviously does not work, since I just keep replacing the same html through the loop.
var jsonData = {"Super" : [{"Name" : "John Doe", "Age" : "30"}, {"Name" : "Jane Doe", "Age" : "40"}]};
$.each(json.Super, function() {
$('#box .Name').html(this.Name);
$('#box .Age).html(this.Age);
});
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