Usually when I create a custom element I wrap it in a section or other appropriate HTML element and style that, but this leads the DOM looking like custom-element > section.
My question is, is it wrong to remove the section and simply treat custom-element as the root element and style that?
For example I have a custom element called tabs, right now when it's used the DOM ends up looking like tabs > div.tabs but I'd prefer to remove the div.tabs element if there's nothing wrong with that.
So my question is is it "wrong" to style my custom elements and treat them as any other HTML element, or should I continue to ignore my custom elements completely (even though it's hard to do so when you use > and other selectors)?
There is absolutely nothing wrong with styling custom elements. To reassure you, custom elements are valid HTML and unless you're supporting an older browser less than Internet Explorer 9, then you'll need to do some extra work to get the browser to recognise them.
I style custom elements all of the time, I even style Aurelia's <router-view> custom element as well.
It's better...
Don't forget that the default CSS display for a custom element is inline.
So if you want to use border, width... you should explicitly set display (to inline-block for example):
custom-element {
background: lightgreen;
width: 60px;
border: 1px solid blue;
}
.ok {
display: inline-block;
}
<custom-element>This is
<div>ugly</div>
</custom-element>
<hr>
<custom-element class="ok">That's
<div>fine</div>
</custom-element>
Related
I tried this:
input[time] {
margin: 2px;
}
...but it does nothing.
Just to see what, if anything would happen, I also added parring: 2px; but still nothing. So how can I get the time element to shove other elements that invade its personal space out of the way?
you need to specify it is a type like so
input[type="time"]{
margin: 2px;
}
This article goes other this further if you are interested,
Kieran
Use input[type="time"] instead of input[time]
The [attribute] CSS selector targets HTML tags who have a certain attribute no matter the attribute's value.
The [attribute="value"] CSS selector targets HTML tags with an attribute with a set value.
I have elements with this pattern (XML, not HTML, but CSS should still work):
<expan abbr="XX">YY</expan>
Sometimes I want to see "YY" in the output, sometimes I want to see "XX". No problem when I want to see "YY" and not the attribute value: just leave it as is. No problem if I want to see BOTH the element content and the attribute value: this bit of CSS does that:
expan:after {content:attr(abbr);}
will display <expan abbr="XX">YY</expan> as "YYXX".
But: problem if I want to see the attribute value and NOT the element content -- that is, if I want to see just "XX". I can use either CSS display or visibility to hide the element <expan>. But it hides EVERYTHING, including the :after pseudo-element. So, this code:
expan:after {content:attr(abbr);}
expan {display:none;}
Shows nothing at all.
So, good folk... help. This seems a very obvious thing to want to do. Of course, I could do it pretty easily manipulating the DOM with Javascript. But for various reasons, I don't have that option. I'd like to do it with simple CSS. Can I??
You'll have to use some kind of hack where the element is still there but only the pseudo element (:after) is visible to the user. An example of this would be color. If you know it's only text, then you can set the color to transparent on the main element, and set it to a real color on the pseudo. You'll still have a blank space to deal with, but you can fix that with position: relative on the parent and position: absolute on the pseudo element, because the pseudo element is a child of the main element. note that the text is still there, but you only see it if you highlight it with the mouse. That's fixable too, with ::selection, but it would still be copyable by accident, and ::select is only available in modern browsers.
Here is a demo showing what I mean: DEMO
EDIT: This one should work with text around it, but you'll have to increase the width in order to add more text: DEMO
Works for me in Chrome and Firefox.
One partial solution is to set the expan font-size to 0 and the :before content font-size to the desired size:
expan:before {
content: attr(name);
font-size: 15px;
}
expan {
font-size: 0;
}
Trying to set the :before font-size to 100% did not work.
You can only set the 'content:' attribute on ::before and ::after psuedo-elements.
But what you can do is just provide both your texts in two separate attributes, like this:
<div long-text="This is very long text" short-text="Short text">
<!-- this part is empty -->
</div>
Then your CSS can switch between them like this:
.AltText::before { content:attr(long-text); }
#media screen and (max-width:1200px) {
#HeaderTabContainer .AltText::before { content:attr(short-text); }
}
Or you could use a third attribute to toggle between them.
I have a few stylesheets that beautifully style all my elements within the tag.
I do have one specific that I need to populate with some custom html (from the database).
Is there a way to ignore all styles only within my element? or am I out of luck here.
You can't clear styles, I am taking a shot in the dark here on your question.
But you will have to RESET your styles for a particualar element:
div.reset{
margin: 0;
padding: 0;
etc;
}
for something like:
<div class="reset">something</div>
that way you will reset your styling of that particular element.
I was trying to put a image (logo) in the header element provided by HTML5 and I am curious if anyone knows if it is possible to declare a class in CSS something on the lines of header.image?
I tried header.image and it didn't seem to work, however as soon as I had the class named just .headerimage then it seem to be picking up the padding property I was trying to apply.
I'm doing some very basic learning as it's been sometime I picked up HTML code. Please help if your time permits. Thanks
I was trying to put a image (logo) in the header element provided by HTML5 and I am curious if anyone knows if it is possible to declare a class in CSS something on the lines of header.image?
I tried header.image and it didn't seem to work, however as soon as I had the class named just .headerimage then it seem to be picking up the padding property I was trying to apply.
I'm doing some very basic learning as it's been sometime I picked up HTML code. Please help if your time permits. Thanks
This is not the entire HTML/CSScode, but I could manage to take some screenshots. You guys helped me answer some questions and understand how period is not relevant to what I was trying to do.
Screenshot 1: https://skitch.com/android86/fm4r7/dreamweaver ( HTML design view) Screenshot 2: https://skitch.com/android86/fm4fd/dreamweaver ( CSS)
In the screenshot 1, I tried to have the links for website Contact and Login as a part of the Nav tag provided by html 5, however I wanted these to be horizontally next to the hgroup. I assigned a width to hgroup and now I have a lot of space to the right of hgroup however the nav is starting to line up horizontally, is this something I should handle with position or float property in CSS? I tried both in various combinations, I assigned a width to nav in order to fit in the area however it doesn't seems to be working. Any clue? The CSS code is in screenshot 2. After looking at the discussion here I thought using class might not be required instead rather parent child relation might be most relevant. I personally thought and read that one should use id's in CSS when it is a very unique scenario and class when we expect to use a certain thing very commonly, is this parent child relation a way of declaring a class? Thanks everyone.
In CSS, a period without spaces like this.thing means:
select elements that have the class thing but only if they are of type this
Period (.) is a special character in CSS, so you can't name classes with periods. Try an _ or a -.
Actually you can't use period in class names, because it is a class selector. For example, is you have a class "foo" applied to some html element, you can style this element in css linking to it as ".foo".
Example HTML:
<header class="foo">
<img class="bar" src="some/path/here">
Some content here
</header>
Example CSS:
.foo { color: #AAA; }
or
header.foo { color: #AAA; }
In first CSS example the style will be applyed to all elements, wich have class "foo". In the second - to all elements, wich have class "foo" and same time are of "header" type.
Returning to your case, I think the only aim is to apply style to image inside of header element. It can be done different ways:
Use the image class
.bar { width: 100px; }
or more concretely
img.bar { width: 100px; }
Use parent-child relations
header img { width: 100px; }
above will apply styles wich lay inside the header element or in its
children elements
header>img { width: 100px; }
this will be ok only for the direct child of header.
Combine two approaches.
If you know for shure that there will be only one image in header element, I can recommend the approach with ">". Read more about different css selectors, ids and classes. It will do the job.
Assuming your markup looks like this:
<header><img /></header>
The selector you want would be this:
header img {...}
If you really did class your image with class="image" (kinda redundant), then you'd want:
header .image {...} /* note space */
This assumes that the browser supports the html header element. If it doesn't, you'd want to use something like html5shim 1 or modernizer 2
My browser extension embeds a div item to webpages opened by browser on the fly. div contains several children items such as buttons, spans, input boxes etc.
Problem is when div is inserted to page, page's css affects the div and it's contents.
For example if the page has a css such as :
span {
text-shadow: 1px 1px 1px blue;
}
then the spans in my on the fly added div have blue text shadows. What i'm doing to fix this is to set any possible directive that might affect my div's content with !important, like
mydiv span {
text-shadow: none !important;
}
and it's rubbish.
Is there any sane way to override css for a given item, that'll take it back to browser (google-chrome) defaults?
Thanks.
Is there any sane way to reset the css to browser defaults for only a single item?
Sadly, no. The auto value will act as the default under some conditions, but not always, and you still have to specify it for every possible property. This is something about CSS that really sucks.
One idea comes to mind, though. Seeing as you're asking specifically about Chrome, if you control all the CSS classes and don't mind some clutter, you might be able to work with CSS3's not like so:
span:not(.default) {
text-shadow: 1px 1px 1px blue;
}
If you use not(.default) in every CSS rule, you can have elements that have the default behaviour if you give them the default class:
<div class="default">
I have no personal experience with CSS 3, but this should work. It will not work in older browsers, so it's not (yet) really mainstream compatible.
You cannot "reset" css rules, you have to override them (text-shadow:none;)