Trying to select span within the first item in a usorted list but I can't quite seem to get the DOM right
<li class="chapterItem"> <a
href="http://www.neuromanga.com/mangaReader.php?chapterNo=12&#pageNo=1"
title="http://www.neuromanga.com/mangaReader.php?chapterNo=12&#pageNo=1
">Naruto 522 world</a> <span
id="date">Nov 21st 2010</span> <br>
<span style="display:none"
class="hiddenChapNo">12</span> </li>
Here is the jQuery code I been trying to use to select it
alert($('li').first().$('.hiddenChapNo').text());
You need to use .find() to get a descendant here, like this:
alert($('li').first().find('.hiddenChapNo').text());
Or a bit more compact with :first and a descendant selector (space):
alert($('li:first .hiddenChapNo').text());
Your code certainly looks like it should work, I assume that there's another <li> before this one that trips it up.
Also, ids are (should be) unique in a web page, so $('#hiddenChapNo') should be sufficient.
Assuming you need multiple hidden spans, the proper way to mark them would be <span class="hiddenChapNo"> (you can then also hide them with CSS instead of inline styles).
Try just using alert($('#hiddenChapNo').text());. An id should be unique on a page, use classes if you need otherwise.
Found a solution
alert($('.hiddenChapNo').first().text());
Related
I am learning jQuery and a few of the problems in my class have been having me do selector practice.
This is probably hella basic, but how do I know if that specific HTML or CSS element I'm selecting requires it to be $('#element') or $('.element') instead of just $('element')?
jQuery (and the DOM functions document.querySelector and document.querySelectorAll) are using CSS selectors to select elements from the DOM.
So basically you look at (an) HTML element(s) and try to find something that identifies the element(s), for instance if you want one particular button:
<button id="login">Login</button>
You can use its id. IDs are by definition unique on the page, so you'll always get that button (or nothing if the ID is different or the button doesn't exist). The "id" selector is a # in front of the actual id, so you'd use #login here.
But what if you want to select multiple items that are similar? For instance:
<li class="menu-item">Home</li>
<li class="menu-item">Shop</li>
<li class="menu-button">Logout</li>
What if you want the all the menu-item elements, but not the menu-button?
This time you can use their class attribute. The class selector is prefixed with a ., so you'd use .menu-item to select those two elements.
There are many other elements and CSS has quite a bit of syntax. Here are a few examples:
You can select by the element's tagname: button selects all <button> elements
You can select by any attribute: button[disabled] selects all buttons with a disabled attribute like <button disabled>n/a</button>
You can select based on their parent: li img selects all the images that are directly embedded in a <li> element
I highly recommend reading the MDN article for more information.
I am trying to select a range of anchor elements using nth-child pseudo selector. The problem is that nth-child will work only with child elements, but I have a structure like this:
<div>
<a>first link>
</div>
<div>
<a>Second link</a>
</div>
<div>
<a>Third link</a>
</div>
In this case, the following selector that I found useful for selecting first 2 matched elements doesn't work:
$("a:nth-child(n+1):nth-child(-n+2)")
I created an example here: http://jsfiddle.net/o6w5orom/ , in the first example all the elements are returned instead of first 2. In the second one works but only with direct children.
So, is there a way to construct CSS selector for jQuery that will basically return a range of elements, something like nth-child, but will work on matched elements of a jQuery object ? I want to construct the selector, don't wan't to write logic to process a jQuery object.
Use: $("div:nth-child(n+1):nth-child(-n+2) a")
Select the divs with the nth-child then descend to the a's
Yes, you are right - :nth-child returns only direct children.
But what's the problem? Use find.
$("div:nth-child(n+1):nth-child(-n+2)").find('a')
Struggling with how to select an element that doesn't have a standard unique id or class. How would I select this input element with Protractor?
Note: I cannot use the class ComboBoxInput_Default class, as this drop down box is used on several other page elements. There also isn't any easily identifiable parent element for at least 10+ DOM levels.
<div style="display:inline; white-space: nowrap;" id="ctl00_ctl31_g_b56afa08_7869_450c_8871_f6759a89d9b1_ctl00_WPQ3txtFields_ddPositioList_10_Solution_MultiComboSelection" class="ComboBox_Default">
<input type="text" style="width: 133px; height: 15px;" delimiter=";" class="ComboBoxInput_Default" value="-select-" name="ctl00$ctl31$g_b56afa08_7869_450c_8871_f6759a89d9b1$ctl00$WPQ3txtFields_ddPositioList_10_Solution_MultiComboSelection_Input" id="ctl00_ctl31_g_b56afa08_7869_450c_8871_f6759a89d9b1_ctl00_WPQ3txtFields_ddPositioList_10_Solution_MultiComboSelection_Input" autocomplete="off">
<div>
The only identifying markup that makes each of these inputs different is appended to the end of the generated id, Solution_MultiComboSelection_Input.
If I had to get this element with jquery, I would use the (not preferrable) contains $( "input[name*='Solution_MultiComboSelection_Input']" ). Is there some comparable way to locate elements in this way with Protractor?
Sure, use the "contains" or "ends-with" CSS selector:
element(by.css("input[id*=Solution_MultiComboSelection_Input]"));
element(by.css("input[id$=Solution_MultiComboSelection_Input]"));
If that is the only element with ComboBoxInput_Default as the class, then you could select it using
element(by.css('.ComboBoxInput_Default'))
This page has a lot of examples for selectors.
Hard to know for sure without seeing the rest of the page but I'd try...
$('input[value="-select-"].ComboBoxInput_Default);
or maybe
$('div.ComboBoxInput_Default input.ComboBoxInput_Default);
That said, the best solution is to have an identifier added to the code. Hope this helps!
I have this element in my HTML page:
<a style="display:block;width:728px;height:90px;margin:0 auto;background:#EEE url('/_images/2011images/img_dotco_3.jpg') no-repeat top left; text-decoration:none;color:#000;" href="/domain-registration/dotco-overview.aspx?sourceid=bnrq2co728x90">
<span style="float:right;margin:5px 27px 0 0;width:110px;color:#FFF;text-align:center">
<span style="display:block;font-size:1em;text-align:center">NOW ONLY</span>
<strong style="display:block;font-size:1.6em;text-align:center"><!-- START TAG // Co_RegisterPrice_TLD -->
<span class="Tag_Co_RegisterPrice_TLD"><strong>$35.70</strong>/yr</span>
<!-- End TAG // Co_RegisterPrice_TLD --></strong>
</span>
</a>
I need to hide it with CSS or Javascript. CSS would be the best scenario but Javascript is OK as well.
The fact is that I cannot edit the HTML code at all, so I have no way to delete this item directly. Also this is not parent of any other HTML element, so I do not find an easy way to hide it with CSS.
Also I need to hide this A element even if the background image changes or the link changes, in fact it's not always the same.
I reported all the available HTML.
Here is an example http://subdir.co/help-center/default.aspx
It's the top banner there.
Let me know how to hide it from the page. Thanks.
Try with jQuery:
$('a[href^="/domain-registration/dotco-overview.aspx?sourceid"]').hide();
This hides the a tag with a href attribute starting with /domain-registration/dotco-overview.aspx?sourceid.
Use:
document.getElementById('yourElementId').display=none;
You can traverse the dom tree from the class "Tag_Co_RegisterPrice_TLD" to find the A tag which you can then hide.
If you need to do additional logic then you can access the text (e.g. price/title/url) before deciding to hide.
Use jQuery if raw javascript is to much for you.
Since you cannot change the HTML code, you can't add an identifier to the element in order to select and manipulate it.
But you can use jQuery to select the first 'a' element, and set the 'display' property to 'none'.
I think something like this should do:
$('a:first').css("display","none");
You could try it with css:
a[style][href] {
display: none !important;
}
i think adding class or making some rule for css selector woudn't work, because definition in attribute of the elements overrides another style definition.
It will be easy if you use some javascript library for dom manipulating for example jQuery.
after that you can write something like
$(".sCntSub3 > a").hide()
you can try finding element from browser console. It is easy way how to verify you choose right element
jsFiddle Classname Method DEMO
jQuery via Classname: In this method we "look inside" the anchor for clues.
$(document).ready(function () {
// To disable the line below, just comment it out just like this line is.
$('.Tag_Co_RegisterPrice_TLD').closest('a').hide();
});
jsFiddle ID Method DEMO
jQuery via ID: This time, we don't look inside since anything can change. We now use a div reference!
$(document).ready(function () {
// To disable the line below, just comment it out just like this line is.
// No matter the unique ID code in front of MasterUpdatePanel Div, it will always be matched.
$('[id$="MasterUpdatePanel"]').next('a').hide();
});
Shown here is a Firefox Screenshot of the HTML Page. Notice the Div ID contains ctl00_MasterUpdatePanel. The letters, numbers, and underscore in front of that may change, but not this keyword. Therefore, a match of the "ending part" of the id works!
I'm a little confused about HTML classes and IDs, as I'd like to use them BOTH to describe an HTML element. Is this valid and supported by most browsers?
The motivation for me to use both is this:
I have a CSS style that I would like applied to multiple elements.
I have some AJAX and Javascript that will manipulate those same elements, so I need a way to identify which element is which using an ID.
So I'd like to use an id to identify each element for JS manipulation AND at the same time I would like to specify a class so that the same style is applied from the same css.
An ID would be unique to only one item, where a class can be used to group many items together. You can use them together as you stated, ID as a unique identifier for Javascript and the class to markup with CSS.
Search for html class vs id to get many articles about this topic.
Example:
<ul>
<li class="odd" id="item1">First Item in the List</li>
<li class="even" id="item2">Second Item in the List</li>
<li class="odd" id="item3">Third Item in the List</li>
</ul>
Yes, it is perfectly valid to use both the ID and Class properties in one element. Example:
<div class="infoBox" id="myUniqueStyle"> *content* </div>
Still, keep in mind that an ID can only be used once (hence its name), while you can use classes as many times as you'd like througout a document. You can still use both the ID and the class to apply styles, while only the ID is a simple way of reaching the element through javascript.
A good way of doing it is applying IDs to all elements that you know are unique (header, navigation, main containers etc.), and classes to everything else.
"Is the" applies to elements using ID: "This is the navigation bar", "this is the header"
"Is a" or "is an" applies to elements using classes: "This is a blogPost", "this is an infoBox" etc.
You can definitely use both if you need to.
An ID is typically used to identify structural sections of your site - you should have only one element with a particular ID and any element can have only one ID.
A class is used to set styles which might be used in more than one place in your HTML file - any element can have multiple classes set.
A typical HTML document using both IDs and classes might be something like
<html>
...
<body>
<div id="header"></div>
<ul id="nav" class="full-width dark">...</ul>
<div id="content">
<div id="important-container" class="class-set-by-javascript another-class-set-by-javascript"></div>
</div>
</body>
</html>
Yes, any normal browser should allow the setting of CSS classes regardless of element id. However, setting styles on a specific element (using ids, for example) may override styles set through a CSS class.
Just a very obscure note about combining class and id in your CSS declarations, there's a bug with IE6, if you have:
two or more pages which have an
element with the same id
those elements have different
classes
you're styling them using an
#idname.classname rule
then only the first rule in the stylesheet will take effect.
See this page for details
Yes it is valid in all browsers. ID expresses just the unique IDentification of your html control through others, and class applies some style to it. Use IDs when there is only one occurence per page. Use classes when there are one or more occurences per page.