is there a way to move a javascript function-arg into JSTL tag?
function loadList(listName)
{ <c:forEach var="item" items="${listName}"> .... }
Why did this code"
x = '${item.category}';
work all good and suddenly it didn't work , but change to
x = "${item.category}";
does work ? I did alert( message )in page load to check if the page load success.
I don't think it is possible to put a javascript variable into a JSTL tag without a "postback" or reload of the page. However, the reverse (i.e., putting a JSTL tag value into a javascript variable) should be possible.
The reason is the separation between server-side (JSTL) and client-side (Javascript) code.
With 1st question as what I know, you cant. Instead the reverse of it as your example in 2nd question. As what #jordan mentioned.
In your 2nd question, I'm not sure why, may be you pass a value with ' or single qout on the list.category.
Related
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');
There is some data that I need to get from a local crawled page. It's inline javascript like this:
<script type="text/javascript">
//<![CDATA[
var graph_data = {"query":{"cid":["13908"],"timestamp_from":1402531200,"timestamp_till":1402531200,"views":1138942,"data":
etc, the variable is very long but you get the idea. I want to put "graph_data" into an array called $data. What is the best way to do this? I should add this is all being done by me locally & I don't need to execute any javascript code, just extract the data.
I have make a suggestion purely as an idea with some code worth trying!
As suggested, the DOM Document may provide this much easier, but here's another possible solution for extracting...
I'm guessing that the var graph_data is a JSON string that you want to extract from the HTML page so that you can store as a PHP var. The problem is that your code doesn't show how the variable ends but I'm going to assume that a new line break would be the way to identify the end of the variable being set. It may be a semi-colon though and if it is, instead of "\r\n" try ";"
// Assuming your html code is stored in $html...
preg_match("/var graph_data[^\{]*?(\{[^\r\n]+?)/is",$html,$match);
print "<pre>";
print_r($match);
print "</pre>";
This should result in $match[1] storing the part you need.
You can try passing that into json_decode() but that's touching some wood with crossed fingers.
Good luck...
This is probably a stupid mistake that i have made; i am still new to web development so be nice please :)
Here i create the object
var crs0 = {ID:1, TITLE:"test", DESC:"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",ER:"a",LENGTH:"a", FEE:"a"};
Here i use an onclick event to call a function & pass the object as a parameter
<div class = "btnDC" onclick="display(crs0)">test</div>
Here is the function that i use to replace data in some textarea's & text inputs with properties from the object.
function display(crs)
{
document.getElementById("ttl").value=crs.TITLE;
document.getElementById("dsc").value=crs.DESC;
document.getElementById("er").value=crs.ER;
document.getElementById("lng").value=crs.LENGTH;
document.getElementById("fees").value=crs.FEE;
document.getElementById("ID").value=crs.ID;
}
The onclick does nothing & i have no idea why. (Other javascript on the page does work so i haven't missed a semi-colon :D )
[Update 1]
All of the data is pulled from a database the code above is copied from the page it produces; i have done a few tweaks & i can get it to produce an alert box for the display function however if i try & make it show any data of the object within that alert box it doesn't display anything (i hate not having a debugger), which suggests that the object isn't being passed.
Here is the PHP code i use to create the onclick
echo '<div class = "btnDC" onclick="display(crs'.$n.')">'.$inf['TITLE'][$n].'</div>
Could that be the issue?
it produces this line of code
<div class = "btnDC" onclick="display(crs0)">test</div>
As mentioned the code i have shown works (thanks juvian);
I generated this code from php & although the javascript generated was correct there was a problem with some of the php, i didn't find the exact problem but i have re-written most of the php & now it works.
As mentioned the code i have shown works (thanks juvian); I generated this code from php & although the javascript generated was correct there was a problem with some of the php, i didn't find the exact problem but i have re-written most of the php & now it works.
I have googled it several times but i can't get a solution. I want to make javascript function call from the bean class in jsf and i get that using the following code.
RequestContext.getCurrentInstance().execute("handleResize()");
and is workign fine. But I want to give two parameters to that function height and width. How can it be done ? please help
You seem to fail to grasp the fact that in the context of Java/JSF, all the HTML, CSS and JavaScript code are merely plain vanilla Strings and you seem to expect that HTML/CSS/JS somehow magically runs inside Java/JSF code. This is not true. Java/JSF is a HTML/CSS/JS code producer, not executor. The webbrowser retrieves them all as one big String and then parses and executes it.
If you want to invoke a JS function with parameters supplied, like so when you would do in real JS code:
handleResize(500, 300);
And you have those values as Java variables, then you just need to make sure that you write Java code in such way that exactly the above String is produced (again, this is just Java code, no JS code):
String call = "handleResize(" + w + ", " + h + ")";
You can verify beforehand by printing it to the stdout/logger:
System.out.println(call);
It must print exactly the desired valid JS function call syntax handleResize(500, 300);.
If it does, then just pass that unmodified to RequestContext#execute().
RequestContext.getCurrentInstance().execute(call);
I know there is already questions about that, but I just can´t simply get this work, I have a JSP file with a java variable in it:
String test = "Hello";
And I need to read this value in the Javascript embedded in the same JSP file, I tried so many options, but it is not working, and for security I don't want pass the value using the URL or hidden values.
Any ideas of how get this working?
The best way to do it is to use something like following in your javascript code;
var myvar = '${jspvar}';
I know this one is old, but this worked for me:
var javaScriptVar="<%out.print(javaString);%>";
you need to make sure that if you are using an external js file (out of the jsp file), the above line has to be before the "include" script tag. for example this is the jsp file:
var javaScriptVar="<%out.print(javaString);%>";
<script src="some_location/test.js"></script>
You can pass the value by calling some methods in html part..
<input type="submit" value="view" onclick="callpro('<%= varname %>')" />
var jsvariable="<%=test%>";
One thing to note is that you could namespace those variables in this way:
var MYAPP.javaScriptVar="<%out.print(javaString);%>";
The technique is from "Javascript: The Good Parts" Book.