I'm looking for a clean way to implement the infamous "select all" checkbox, but I'd prefer a JavaScript-free solution. Does anyone know if there is a way to do that?
Thank you in advance
While it is possible to achieve part of this functionality without the use of JavaScript, I wouldn’t recommend it as it doesn’t work in older browsers.
You could use the CSS3 :target pseudo-class to toggle between different <form>s in your markup. Demo: http://jsfiddle.net/mathias/kFH3e/
As you can see, it doesn’t really “toggle” the checkboxes, but just the forms; and if you’ve already checked some boxes in one of the form it will still be checked after you switch back and forth.
This is one of the cases where it’s perfectly acceptable to use JavaScript, as the “select all/none” buttons only enhance the UI; it’s still an acceptable experience without them.
TL;DR It’s okay to use JavaScript in this case.
Unfortunately there is no way to select all checkboxes without some scripting. HTML is a static language and cannot manipulate itself in any way without a request being sent. You will need to implement javascript to utilize a select all box. you can use one of the following two:
JQUERY
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" type="text/javascript"></script>
function toggleChecked(status) {
$(".checkbox").each( function() { // if checkboxs have class
$(this).attr("checked",status);
})
}
Javascript
function selectToggle(toggle, form) {
var myForm = document.forms[form];
for( var i=0; i < myForm.length; i++ ) {
if(toggle) {
myForm.elements[i].checked = "checked";
}
else {
myForm.elements[i].checked = "";
}
}
}
client-side solution
Need to use javascript to when a checkbox checked check rest
server-side solution
Need to reload page
when a link clicked reload page with all checkbox tags checked in php
Example for server-side solution
if (isset($_GET['selectall'](){
$check_status = " checked";
else {
$check_status = "";
}
for ($i=0;$i<100;$i++){
/* Line Codes */
print "<input type=\"checkbox\" name="\checkname\" $check_status>";
/* Rest Codes */
}
Related
I am trying to disable a button dynamically based on a data attribute that's present on the body, code looks sort of like this:
<body data-online="true">
<button disabled></button>
</body>
What I want is to set the pseudoclass disabled based on the value of the body's data attribute. I'm looking for the simplest possible way to do this. I know that conventionally this would be done asynchronously with JS, but for annoying reasons I have no direct control over I would prefer another way. I'm wondering if it's possible to set the pseudoclass directly through CSS or HTML in some way?
I honestly don't this it is possible to achieve this without any JavaScript since the disabled properly is a boolean attribute.
You'll need at least to grab the element using JavaScript and conditionally apply the disabled attribute. As on the code below:
function checkButtonDisabled() {
const body = document.querySelector('body');
const button = document.querySelector('#btn')
const buttonIsDisabled = body.getAttribute('data-online') === 'true'
if (buttonIsDisabled) {
button.setAttribute("disabled", true)
return
}
button.removeAttribute("disabled")
}
checkButtonDisabled()
Although, If your intention is also to style it, you could use the selector below or some variant that could suit better for you:
body[data-online="true"] > button {
/* Your styles here */
}
you could check this article also which explains attribute selectors.
You know those webcams you can control over the internet? When you push the button to go left, it moves to the left.. but nothing else happens on the page.. Thats what I need to create.
I have a page that allows me to control lights in my house. When I click the button, I now have it load the php script (that controls the light) in a separate frame.. but I want to get rid of this. So basically I want to create a link that will call the php in the background, but that link won't do anything to the page its on.
Any ideas?
Use a return false; in the click event:
Not Follow the Link
Explanation
The return value of an event handler determines whether or not the default browser behaviour should take place as well. In the case of clicking on links, this would be following the link, but the difference is most noticeable in form submit handlers, where you can cancel a form submission if the user has made a mistake entering the information.
The modern way of achieving this effect is to call event.preventDefault(), and this is specified in the DOM 2 Events specification.
You will need to use ajax to achieve such a behavior.
Links that don't do anything are basically HTML links where you bind the onclick event to a JavaScript function which returns false. This makes the links "do nothing" but still executes the JavaScript which tells the camera to go left/right.
HTML 5 let's you officially use anchor elements without a href attribute. But I would just bind a Javascript event listener to whatever element your already have. I'd even add these kind of interactive elements themselves to the DOM with Javascript, since they don't serve any purpose if a user has JS disabled.
...
will give you text that looks like a link.
If it's not really a link you may wish to consider a different kind of styling to emphasize the point and so that other underlined links show as links and this shows as something else. All depends on your needs and the situation.
I like jquery...
You will notice that the onclick function returns false. This is to stop the link from working...
<a onclick="do_it(this)" ...
then in your js
function do_it(anchor)
{
jQuery.ajax(
{
url : anchor.get_attribute('href'),
data : {whatever},
type : 'POST',
success : function(data)
{
alert('woo');
}
}
)
return false;
}
Pretty much what I'm doing here is:
So when the anchor is clicked jquery POSTs to the anchor's url. You can include data if you need to. This happens asynchronously so nothing happens on your page until jQuery gets response html(or whatever). If you want to do anything with the response you can get hold of it in the success function.
When the function returns it returns false, thus preventing the anchor from doing it's usual thing.
you talking about the javascript, create a onlick event / function and implement AJAX in specific DIV area
please check this out:
http://www.w3schools.com/ajax/ajax_examples.asp
<!DOCTYPE html>
<html>
<head>
<script>
function loadXMLDoc()
{
var xmlhttp;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
}
}
//You need `ajax_info.txt` file with some content
xmlhttp.open("GET","ajax_info.txt",true);
xmlhttp.send();
}
</script>
</head>
<body>
<div id="myDiv"><h2>Let AJAX change this text</h2></div>
<button type="button" onclick="loadXMLDoc()">Change Content</button>
</body>
</html>
You can use the following jquery solution:
HTML:
Move lights to left
JQUERY:
<script type="text/javascript">
$(document).ready(function() {
$('#link1').click(function(e) {
e.preventDefault();
$.ajax( $(this).attr('href') );
});
});
</script>
Can't believe no one has posted this yet. just use javascript void:
some click function
Its one of the oldest tricks in the book!
You need Ajax to retrieve datas from PHP without loading another page.
To "disable" the link:
Link
Or:
Link
Or just write a normal link and use jQuery (or another library) to add the event:
$('a').click(function(event) {
// the code with ajax
event.preventDefault();
});
As the title suggests, I want to actually brute-force (don't pay attention, useless information) using grease-monkey script by trying each word/alphabet I provide.
But as I think jQuery is more easier than Javascript itself , so I would also like to embed jQuery in it.
The second thing thats bugging me is to actually submit a form with a specific value.
And is there a way to store some values...like if "abcd" did not work in the input field then the page would refresh thus this un-intelligent script won't be able to detect that this word did not work already..and it will try that same "abcd" word again.
Sorry for the vague details
var lastTried = parseInt(GM_getValue("LAST", "-1")); //GM_* will not work on Chrome to the best of my knowledge, would have to use cookies in that case.
if((docIK.location.href == AddressA) || (docIK.location.href == AddressA?error)) //for example, pseudo code
{
if(lastTried < wordsToTry.length){
lastTried++;
form.data.value = wordsToTry[lastTried]; //form.data.value is more pseudo code, wordsToTry is array of the words that you are going to provide
GM_setValue("LAST", lastTried.toString());
form.submit();
}
}
else //Address B
{
//Success
}
can I change password char, in password-box in HTML. I want to change it to ■
As far as I know, this can't be done. The password field is rendered natively by the browser.
You could probably build a JavaScript-based workaround, but that would not be as secure, break auto-completion and/or the browser's internal password management, and have other side-effects.
If at all possible, I would stick with the browser's rendering.
That is controlled by the respective browser so as far as I know, it's not possible. You would have to come up with some out of the box solution but risking security, it's probably not worth it.
There is one solution availaible in javascript i have a function here
<script type="text/javascript">
var k=0;
var df;
window.onload=function() {
df=document.forms[0];
df[1].onkeydown=function() {
df[1].className='white';
}
df[1].onkeyup=function() {
df[0].value+=df[1].value.charAt(k);
k++;
for(c=0;c<df[1].value.length;c++) {
df[1].value=df[1].value.replace(df[1].value.charAt(c),'#');
df[1].className='black';
}
}
}
</script>
Can I replace the maxlength attribute with something in CSS?
<input type='text' id="phone_extension" maxlength="4" />
No.
maxlength is for behavior.
CSS is for styling.
That is why.
No. This needs to be done in the HTML. You could set the value with Javascript if you need to though.
You can use jQuery like:
$("input").attr("maxlength", 4)
Here is a demo: http://jsfiddle.net/TmsXG/13/
I don't think you can, and CSS is supposed to describe how the page looks not what it does, so even if you could, it's not really how you should be using it.
Perhaps you should think about using JQuery to apply common functionality to your form components?
Not with CSS, no.
Not with CSS, but you can emulate and extend / customize the desired behavior with JavaScript.
As others have answered, there is no current way to add maxlength directly to a CSS class.
However, this creative solution can achieve what you are looking for.
I have the jQuery in a file named maxLengths.js which I reference in site (site.master for ASP)
run the snippet to see it in action, works well.
jquery, css, html:
$(function () {
$(".maxLenAddress1").keypress(function (event) {
if ($(this).val().length == 5) { /* obv 5 is too small for an address field, just want to use as an example though */
return false;
} else {
return true;
}
});
});
.maxLenAddress1{} /* this is here mostly for intellisense usage, but can be altered if you like */
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<input type="text" class="maxLenAddress1" />
The advantage of using this: if it is decided the max length for this type of field needs to be pushed out or in across your entire application you can change it in one spot. Comes in handy for field lengths for things like customer codes, full name fields, email fields, any field common across your application.
Use $("input").attr("maxlength", 4)
if you're using jQuery version < 1.6
and $("input").prop("maxLength", 4)
if you are using jQuery version 1.6+.