I have CustomField with FormLayout inside and i want change #layout element of FormLayout inside #shadow-root. Of course, i can do that by js:
document.querySelector("#myid > vaadin-form-layout")
.shadowRoot
.querySelector("#layout").style.<property>=hz;
Is it possible to change the style of an element using css?
Thanks!
See the styling documentation: https://vaadin.com/docs/latest/styling/getting-started/#styling.get-started.shadow-dom-styling
But do note, that the #layout element is considered an internal implementation detail, and it is not guaranteed to be available in future releases (major, minor, or maintenance). The element might be gone or the ID change at any point.
Related
I am looking for the next scenario in css where i will be able to check if a style is applied without using any javascript code. Example: If flex: wrap is applied add another style like gap: 5. All this computations should be done using only css. I inspected the documentation but i did not find something similar. Could somebody help?
You can directly use the "gap" css. If there is a flex property used, only then the gap property will work. So no harm in using the gap property by default. Why check for whether flex is used or not.
as far as I understand, to check a style is applied, it must use javascript code,
ex:
const box = document.getElementById('box');
// Check if CSS property is contained in Style
if (box.style.backgroundColor) {
console.log('value is', box.style.backgroundColor);
} else {
console.log('CSS property is not contained in style');
}
I'm working on an angular 4 project and I'm trying to override css in a specific component. My changes also show up after compiling but they are not affecting the element. The element sits in a parent component, but I already tried using :host.
Element:
Generated CSS:
I had this same problem and I found out you can style your children component from its parent. The generated css never match what you want. See the picture.
I solved it by passing a state info(expanded #input attr) to the child component and styling it according to this state value as so:
Image illustrating my point
...
I am working with Magento which doesn't allow for classes on images in the visual editor; so I want to program it to automatically apply right margin to an image if the image has the property float:left ... and visa versa. Is this possible without using javascript?
If it's part of the style attribute, then sure: [style*='float:left']
No, there isn't a selector based on CSS properties, apart from scanning selecting on the style attribute - after all you set them with CSS.
The easiest way would be to set the margin-right property at the same place where you set the float property.
See also:
http://www.w3.org/TR/selectors/#selectors
http://dev.w3.org/csswg/selectors4/#overview
Assuming all of your styles are placed in an external stylesheet the answer's 'not without javascript'.
If, however, you're placing that specific style on the html (inline styles, that is) then what Kolink suggested does work.
Anyway, using javascript(jQuery) here's a possible solution: http://jsfiddle.net/joplomacedo/TECWM/
If you can't see the fiddle, it goes something like this:
if (el.css('float') === 'left') {
el.css({
'margin-left': '50px'
});
}
The title pretty much says what I'm looking to do, but to elaborate a little more, I want to apply some CSS to a class called prochart-colitem for users who do not have javascript enabled.
The reason? I am using percentages for column widths to equal 100%, then using javascript to subtract 2 pixels from each div for a border that is also added.
If there's no javascript enabled, the columns + borders equal more than 100% of the parent div, and I need to subtract a couple pixels from a class to make it fit in the parent div to no-js users.
Any easy way to do this? I tried <noscript> with <style> inside of that, no luck.
One way to approach it is by always adding a CSS class to the elements you wish to have a specific style and then, once loaded, run some JavaScript to remove those classes from the elements with that class.
As an example (I use jQuery here for simplicity's sake but this can obviously be done without a JS library):
$(document).ready(function()
{
$(".nonJsClass").each(function()
{
$(this).removeClass("nonJsClass");
}
}
Where the 'nonJsClass' has CSS rules that will now only apply if the user doesn't have JS enabled.
You could add a class to the body tag, that triggers your desired CSS when JS is not enabled, then right after the body tag, remove it with JS.
Thus users with JS support won't see the effects of the special class.
Including a stylesheet inside a noscript tag was not possible before HTML5, but it is now (as long as you do it in the "head" of the document).
http://adapt.960.gs/
In the case of JavaScript being purposefully disabled or unavailable, stylesheet defaults can be served via , which is perfectly valid in the for HTML5.
scunliffe's answer is good. An alternate way would be to write a CSS style that only displays if JavaScript is enabled and only targets the div you want, using class chaining:
.prochart-colitem.js-enabled {
/* your JS-specific styles */
}
You can then use jQuery, for example, to add that additional class:
$(document).ready(function() {
$('.prochart-colitem').addClass('js-enabled');
});
I'm familiar with assigning CSS classes to GWT elements to control their formatting, but what if I want to change an attribute in one of those CSS classes?
I've got a styled list of data. CSS classes are used to indicate the various data types (important, routine, trivial). I wish to allow the user to hide trivial entries. I'd like to modify the span.trivial CSS class to set display:none
I'm aware I could loop through the entries, see if an entry is trivial and add a noShow class (which itself has display:none) - but then I'm doing the looping, I'd rather let the browser do the work.
Is this possible in GWT?
Ian
I assume we have a structure similar to the following one
<div>
<span class="routine">A</span>
<span class="trivial">B</span>
<span class="trivial">C</span>
<div>
This is how I would solve the problem:
.hideTrivial span.trivial {
display: none;
}
<div class="hideTrivial">
<span class="routine">A</span>
<span class="trivial">B</span>
<span class="trivial">C</span>
<div>
The ".hideTrivial span.trivial" selector applies only to "trivial" spans, if they occur within another element that has the class "hideTrivial". (Note: The span doesn't have to be a direct child of the "hideTrivial" div - it's ok, if you have a deeper element hierarchy.)
So to turn on/off hiding, you simply add/remove the "hideTrivial" class from the outer div.
(This technique can be used with and without GWT.)
AFAIK, javascript can not change the CSS file and have it reapplied. The same goes for GWT (since it compiles down to JS). So, you can not change a CSS rule and have all elements in your DOM reflect the change.
However, you can get a style of a DOM element and change that style. But that is for a particular element. In your case you'd still need to write code to traverses a set of element and make the change.
My suggestion would be to look at gwtQuery (a port, not a wrapper, of jQuery to GWT). It's super-efficient and super-compact. Here is a one-liner to do what you need:
$("span.trivial").hide()
Fot those who need to modify global CSS property values: you can choose StyleInjector for that purpose.
http://google-web-toolkit.googlecode.com/svn/javadoc/2.0/com/google/gwt/dom/client/StyleInjector.html