there have been many questions like this before, but the answer usually involved referencing the element to be outputted to within the script. in my case, elements are created dynamically on load (it's hosted on Tumblr, to be specific), so there's no referable ID for each of the elements I need to output a string to.
is it possible to do this? jQuery can be used if it makes things much simpler. my function takes a string as an input and outputs a string using return.
$('.post .posttext a').html(YourfunctionThatReturnsAString());
This should do it
$('.post .posttext a') -> this returns an array of a elements.
$('.post').eq(the post number).find('.posttext a') -> replace "the post number" with the number of your post if you want to target something more specific.
You can then call the text("your text") method to set the text.
Related
Ok this one seems pretty simple (and it probably is). I am trying to use jQuery's replace with method but I don't feel like putting all of the html that will be replacing the html on the page into the method itself (its like 60 lines of HTML). So I want to put the html that will be the replacement in a variable named qOneSmall like so
var qOneSmall = qOneSmall.html('..........all the html');
but when I try this I get this error back
Uncaught SyntaxError: Unexpected token ILLEGAL
I don't see any reserved words in there..? Any help would be appreciated.
I think the solution is to only grab the element on the page you're interested in. You say you have like 60 lines. If you know exactly what you want to replace..place just that text in a div with an id='mySpecialText'. Then use jQuery to find and replace just that.
var replacementText = "....all the HTML";
$("#mySpecialText").text(replacementText);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="mySpecialText">Foo</div>
If you're only looking to replace text then jaj.laney's .text() approach can be used. However, that will not render the string as HTML.
The reason the way you're using .html() is likely illegal is that qSmallOne is not a JQuery object. The method cannot be performed on arbitrary variables. You can set the HTML string to a variable and pass that string to the .html() function like this:
var htmlstring = '<em>emphasis</em> and <strong>strong</strong>';
$('#target').html(htmlstring);
To see the difference between using .html() and .text() you can check out this short fiddle.
Edit after seeing the HTML
So there is a lot going on here. I'm just going to group these things into a list of issues
The HTML Strings
So I actually learned something here. Using the carriage return and tab keys in the HTML string is breaking the string. The illegal-ness is coming from the fact the string is never properly terminated since it thinks it ends at the first line. Strip out the white space in your strings and they're perfectly valid.
Variable Names
Minor thing, you've got a typo in qSmallOne. Be sure to check your spelling especially when working with these giant variables. A little diligence up front will save a bunch of headache later.
Selecting the Right Target
Your targets for the change in content are IDs that are in the strings in your variables and not in the actual DOM. While it looks like you're handling this, I found it rather confusing. I would use one containing element with a static ID and target that instead (that way you don't have to remember why you're handling multiple IDs for one container in the future).
Using replaceWith() and html()
.replaceWith() is used to replace an element with something else. This includes the element that is being targeted, so you need to be very aware of what you're wanting to replace. .html() may be a better way to go since it replaces the content within the target, not including the target itself.
I've made these updates and forked your fiddle here.
This seems like a simple thing, but I keep getting "undefined"
I am trying out the "data-" HTML5 attribute and I am looping through a bunch of div tags that look like this:
<div id="myEvent"
data-scheduledOn="1399985100000"
data-eventStatus="3">
And I am looping through a bunch of these like this:
$('[id="myEvent"]').each(function(index, divItem) {
alert($(divItem).data("scheduledOn"));
}
But I keep getting "undefined" If I do this (get the attribute) it works fine:
alert($(divItem).attr("data-scheduledOn"));
So What am I missing?
http://api.jquery.com/data/
"The .data() method allows us to attach data of any type to DOM elements in a way that is safe from circular references and therefore from memory leaks."
At least at this point in time, to use the .data function you have to attach the data using the function before you can read it back using the .data function.
If you need to read pre-existing data use the .attr or .prop functions.
It seems as though It is a naming problem as Hamza Kubba suggested, but just a bit different...
if I changed the name of the data attribute to "data-scheduled-on" I can retrieve it by .data("scheduledOn") OR using data-scheduledon and .data("scheduledon") also works.
So don't use CAPS for data- names is the moral of this story!
Please note that per HTML 5 specs, the attribute name should not contain any uppercase letters and some browsers such as FF & Chrome will change any uppercase letter to lowercase. That's why the following demo works if you access the data attributes with lowercase names:
http://jsfiddle.net/fiddleyetu/5LdQd/
$('div.myEvent').each(function(index, divItem) {
console.log($(divItem).data("scheduledon"));
console.log( $(divItem).data("eventstatus") );
});
Ans since you cannot have more than one element on a page with the same ID, I have used a class selector for the demo.
MORAL: Do not use UPPERcase; your browsers may not always be that 'understanding'.
What I am doing wrong?
javascript:document.getElementsByTagName('textarea').innerHTML='inserted';
I want to create a bookmarklet to insert simple text to a textarea on a given webpage.
Use the value property rather than innerHTML and make sure your code evaluates to undefined, which you can do by wrapping it in a function with no return statement. If you don't do this, the contents of the page will be replaced with whatever your code evaluates to (in this case, the string 'inserted').
javascript:(function() {document.getElementsByTagName('textarea')[0].value = 'inserted';})();
Update 14 January 2012
I failed to spot the fact that the original code was treating document.getElementsByTagName('textarea') as a single element rather than the NodeList it is, so I've updated my code with [0]. #streetpc's answer explains this in more detail.
Unlinke getElementById, getElementsByTagName has an sat Elements because it returns an array array-like NodeList of the matching elements. So you'll have to access one of the elements first, let's say the first one for simplicity:
javascript:void((function(){document.getElementsByTagName('textarea')[0].value='inserted'})())
Also, as mentioned by others, value property rather than innerHTML here.
In case anyone wonders how to use the currently focused text field, use the following:
document.activeElement.value = "...";
In jQuery you have to use if this way:
for single element -> $('#element_id').html('your html here')
for all text areas -> $('textarea').val('your html here')
I have to confess that I`m not sure why it works this way but it works. And use rameworks, they will save you time and nerves.
Any good reason why $("p").html(0) makes all paragraphs empty as opposed to contain the character '0'?
Instead of assuming I found a bug in jQuery, it's probably a misunderstanding on my part.
jQuery only accepts a string as an argument for the val parameter of the html() method. If you pass a number like you are it will call the html() method override that sets the contents of the element but the value of the argument will end up being null or an empty string.
Try this:
$("p").html((0).toString())
Relevant documentation
I guess that at some point, it checks if (newContent == false), and doesn't continue with adding any content? I tried looking at the source, but got a bit lost...
I also guess that this would not be counted as a bug, since the function calls for a string, and if "0" is passed (as a string), it works as expected.
A workaround would be to do this:
var myNum = 0;
$('p').html('' + myNum);
The code performing the html call was within someone else's plugin and rather than modify it, making upgrading it tedious, I just wrote the following tiny plugin that modifies the html method to do as spoon16 recommended.
(function($) {
var oldHtml = $.fn.html;
$.fn.html = function (content) {
oldHtml.apply(this, [content.toString()]);
}
})(jQuery);
It's a little bit of a hack, but it's working for me and doesn't require me to modify the Plugin I'm using.
I just thought someone else might like to see this.
Try using text() instead html().
I geuss you missed part of how jQuery works,
$('p')
returns all paragraphs and the html( val ) function:
Set the html contents of every matched element. This property is not available on XML documents (although it will work for XHTML documents).
http://docs.jquery.com/Attributes/html#val
So if you just want to set the contents for the first p use
$("P").eq(0).html( 'something' );
or to get the html:
$("P").eq(0).html();
http://docs.jquery.com/Core/eq#position
more on jQuery selectors here:
http://docs.jquery.com/Selectors
I am looking at some javascript code and it has this in a function:
$$('.CssClass').each(function(x) { .... } )
I get that the intent is to apply the anonymous function to each element with a class of CssClass, but I can't work what the $$ refers to ... and can't google for $$!
Update: thanks for the hints. The javascript comes from the iPhone look-alike library: jPint which includes the prototypejs library, and does define $$ as:
function $$() {
return Selector.findChildElements(document, $A(arguments));
}
Probably this prototype function:
$$(cssRule...) -> [HTMLElement...]
Takes an arbitrary number of CSS
selectors (strings) and returns a
document-order array of extended DOM
elements that match any of them.
http://www.prototypejs.org/api/utility#method-$$
$ is an ordinary symbol character, thus "$", "$$", "$$$" are ordinary variables.
the meaning of $ depends upon the libraries that are in use; in jQuery the $-function creates a jquery object from a css selector, e.g. $("DIV") is a collection of all DIVs in the current document.
Are you looking at a library such as mootools by chance? This is used as a short-hand to certain types of objects by accessing the DOM. They do things like $('myElement') to access page elements for example.
$ is a valid function name in javascript. So something defines a function $$ that takes a string looking for some class called .CssClass and returns a object where you call each on.
I know that jQuery defines a function called $ at least that does similar things.
Any chance you are looking at a MooTools script?
http://www.consideropen.com/blog/2008/08/30-days-of-mootools-12-tutorials-day-2-selectors/ (now owned by a domain grabber)
"The $$ lets you quickly select multiple elements and places them into an array (a type of list that lets you manipulate, retrieve, and reorder the list in all sorts of ways). You can select elements by name (such as div, a, img) or an ID, and you can even mix and match."
Most likely a shorthand function name that handles the DOM accessing of the specified arguments, whether tag name or object id.
As per above, you're likely in MooTools or jQuery.
In the browser's console, it is another way to write querySelectorAll().
Simply selects all the elements on the web page that you need and puts them in an array.
Practical examples:
Select all the elements and set an outline guide for debugging layouts [source]:
$$('*').map((A,B)=>A.style.outline=`1px solid hsl(${B*B},99%,50%`)
Print the image addresses for all the images on a webpage [source]
$$('img').forEach(img => console.log(img.src))