This question already has answers here:
Why does jQuery or a DOM method such as getElementById not find the element?
(6 answers)
Closed 8 years ago.
<head>
<script src="jquery-latest.js" />
<script>
function makeitnull(){
alert('inside make it null');
//using hex routine 1 -> 3 -> 5 -> 8 -> (11 == a)
document.getElementById("u_0_1").value = "" ;
document.getElementById("u_0_3").value = "" ;
document.getElementById("u_0_5").value = "" ;
document.getElementById("u_0_8").value = "" ;
document.getElementById("u_0_a").value = "" ;
}
</script>
</head>
<body>
<script>
$( document ).ready(function() {
alert('before make it null');
makeitnull();
alert('make it null pahse passed');
$('#u_0_5').click (function(){
$('#js_1').removeClass('hidden_elem');
});
});
</script>
The Problem is that the alert('make it null'); is working but after the function call rest of the code won't work.
I am newbie to the web development on internet i tried to find out my problem but unbale to get the reasonable answer.
As for "after the function call rest of the code won't work" that doesn't really mean anything useful.
That said ... read How to ask a good question if really want help them edit this question to fulfill the requirements in those instructions!
You should know that jQuery is JavaScript. Manipulating the DOM manually while using jQuery demonstrates you don't really understand what jQuery is for.
The title in this attempt at a question makes no logical sense, you can't "call JavaScript" from jQuery for the above reason. That is like asking "How do you do Algebra with Math?"
From the front page of the jQuery home page:
jQuery is a fast, small, and feature-rich JavaScript library. It makes
things like HTML document traversal and manipulation, event handling,
animation, and Ajax much simpler with an easy-to-use API that works
across a multitude of browsers. With a combination of versatility and
extensibility, jQuery has changed the way that millions of people
write JavaScript.
You should not be traversing the DOM manually you should be using jQuery to look up things, that is what it was created for.
At no point should you have to resort to this:
document.getElementById("u_0_1").value = "" ;
this is what jQuery is supposed to be replacing
$("#u_0_1").value = "" ;
this kind of the entire point of JQuery!
You are already looking up other things with the correct syntax.
http://api.jquery.com/id-selector/
Related
This question already has answers here:
What is the difference between client-side and server-side programming?
(3 answers)
Closed 4 years ago.
Having a bad day. This one has stumped me all morning. All the solutions I've found have stopped one step short of where I need to go.
I have a legacy PHP/JS app that I'm working on. Rather than trying to explain it, I'll just show what I need to do.
<?php
$phpDate_1 = new Date($someDate);
$phpDate_2 = new Date($someOtherDate);
//...There are a bunch of these
$phpDate_n = new Date($endOfTime);
<script language="javascript">
function myFunction() {
var line = aUserSelection; //an int from user which tells me what date to use
//Next line is the problem. I'm trying to pull the month from the appropriate PHP date into the JS variable.
var theMonth = "<?php echo $phpDate_" + line + "->getMonth();?>";
}
</script>
?>
I must have tried 20-30 combinations of single and double quotes, escapes, dots, pluses, and so on, but I keep getting errors over the "line" part. Unexpected character, encapsed strings, etc.
Hoping someone can point me in the right direction because my brain is fried at this point. Answers in pure JS and PHP only please because that's how the app is built. Thanks.
You need to close your php (?>) before outputting the javascript to fix the syntax error that you got.
However, with that said, you are trying to incorporate the javascript line variable into the variable name for $phpDate, to generate something like $phpDate_1.
If you don't want to go with an AJAX solution, your best bet would be to output each line's date into a javascript array. This is strongly discouraged, but if this is a legacy application that you cannot make many changes to, this might be your only option.
I have a Jquery function in MVC View that check if at least one checkbox is clicked. Function is working properly if I use hardcoded string. But when I add
#Resources.myString into, it stops working, I can't figure out why
$('.form-horizontal').on('submit', function (e) {
if ($("input[type=checkbox]:checked").length === 0) {
e.preventDefault();
alert("This is working");
alert(#Resources.myString); //with this the function is not working anymore
return false;
}
});
I need to add the the string for multilingual purpose.
I tried diferent aproches
alert(#Resources.myString);
alert(#Html.Raw(Resources.myString))
var aaa = { #Html.Raw(Resources.myString)} //and calling the aaa
I think I am missing some basic knowlage of how this should work together
During page rendering, #Resources.myString will be injected as is in the code. For instance, if myString == "abc";, you'll end up with alert(abc); which is not what you want.
Just try to enclose your string in quotes:
alert("#Resources.myString");
As an aside, putting Razor code in Javascript logic is usually considered bad practice, as it prevents you from putting Javascript code in separate files (and therefore caching), and makes the code less readable.
Take a look as this question and the provided answer which gives a simple way to deal with that.
As ASP.NET dynamically generates HTML, CSS, JS code, the best way to find the error is to read the generated sources (Ctrl + U in most modern browsers).
You will see that your code
alert(#Resources.myString);
produces
alert(yourStringContent);
and should result in a console error yourStringContent is not defined.
You need to use quotes as you are working with a JavaScript string:
alert('#Resources.myString');
It will produce a correct JavaScript code like:
alert('yourStringContent');
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
$(‘<element>’) vs $(‘<element />’) in jQuery
I am used to write $('<div>').
But today I saw a presentation about advanced-jquery by john-resig who use the following syntax $('<div/>').
http://loft.bocoup.com/john-resig-advanced-jquery/
To me they seem to produce the same output.
My question is: is there some difference between
$('<div>') and $('<div/>')?
No, jQuery will normalize those statements into the exact same.
In some earlier version of jQuery tho, it happend to be that <div> was actually faster than <div/> for whatever reason. I don't know yet, if that still applies.
http://jsperf.com/jquery-constructor-performance
Seems like this bug/feature is no longer true.
<div>, <div/>, <div></div>, and even <div/></div> (Yes, this one will only create one element) all trigger the singleTag regular rexpression which makes jQuery to call document.createElement("div"). It was never passed to any html parser at all.
Here's the regex that you can play with, if it returns true, it will be document.createElement'd
var rsingleTag = /^<(\w+)\s*\/?>(?:<\/\1>|)$/;
<div> is an opening tag. <div/> is a self-closing tag. In this context, however, there is no difference.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Can you have multiple $(document).ready(function(){ … }); sections?
May be this question is little bit funny.
I just want to know that can we use $(document).ready()more then one time on a page
If yes then what is the pros and cons for that?
you can use it more than once. In fact, if you don't care at all about
keeping your code small, you could litter your javascript file with
them.
$(document).ready(function() {
// some code here
});
$(document).ready(function() {
// other code here
});
It's great to be able to group your functions within a file or even
across multiple files, and jQuery's flexible $(document).ready()
function allows you to do that, pain free.
read more
Try this out:
$(document).ready(function() {
alert('1!');
});
$(document).ready(function() {
alert('2!');
});
$(document).ready(function() {
alert('3!');
});
above code is the same as below
$(document).ready(function() {
alert('1!');
alert('2!');
alert('3!');
});
Yes you can call it as many times as you want, but it's not a good practice though. No cons as such, I think.
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
JavaScript query string
...Riight. I found the answer to my problem. I'd forgot to add '' around some jsp scriplet tags in my popup window code. Because of this values that should've been strings weren't handled properly.
I'll flag this question for moderator attention. The only thing one can learn from this question is to pay attention when using jsp scriptlets.
I want to open a popup from my .js code using window.open(). I have a couple of parameters that I need to pass to this popup. I'm surprised it's not as simple as I would've thought, I've tried searching for answers but all I found were solutions that were quite complicated - I hope there's a simple answer.
There's a multitude of ways I've tried doing this, but this is how I think it should work..
window.open('../common/MapPopup.jsp?current='+currentPosition+'&areas='+sAreas, 'mywindow', 'width=600,height=450,scrollbars=yes');
I'm at a total loss. Could it be that window.open just doesn't work in this situation?
edit: Currently my page behaves like this. The user presses a form button, which launches a query into our database. From this data a DataTables table is created. As the DataTable is being initialised, so is a piece of jQuery code. I'm using jQuery to open a popup when the user clicks on a row in the DataTables table.
renderReport: function(response){
$('#requestDataContainer').html(response);
oTable = $('#dataTable').dataTable({
"bPaginate": true,
--snip-- //DataTables init
});
var sProcedures = new Array();
var sAreas = new Array();
var sCurrentPosition = null;
$('#dataTable tr').click(function(){
var sCurrentPosition = oTable.fnGetData(this,9);
if(sCurrentPosition!=null){
$('#dataTable').find('tr').each(function(){
var foo = oTable.fnGetData(this);
if(foo!=null){
if(foo[8]!='null')
sAreas.push(foo[8]);
if(foo[7]!='null')
sProcedures.push(foo[7]);
}
});
}
window.open('../common/reportMapPopup.jsp?procedures='+sProcedures+'&areas='+sAreas+'¤t='+sCurrentPosition, 'reportMap', 'width=600,height=450,scrollbars=yes');
});
},
I have to admit, I'm quite newbish when it comes to webcode. I'm kind of learning on the go, so the terminology might be new to me and I could be doing things in a really silly way. It could be that I found the answer when I was looking for it on the web, but just didn't realise it.
If the query string in your url gets passed to the window you should be able to access those parameters from the window using JS using the location object(http://www.w3schools.com/jsref/obj_location.asp)
If you have access to the actual page - can you not retieve the params using jsp?