I'm using css variables in my component and set the width of a div based on data computed in the setup()
setup(props) {
const progressBar = PositionService.getProgressBar(props.position);
const progressWidth = `${progressBar}%`;
...
return { ..., progressWidth };
}
Then I'm using this variable as css variable.
<style lang="scss" scoped>
.progress-bar-width {
--progress-bar-width: v-bind("progressWidth");
width: var(--progress-bar-width);
}
</style>
When rendering the page i noticed that an inline style is added to the html parent component resulting in
.....
The CSP is blocking inline style so this approach doesn't work.
How can I use css variables without inline style?
It's a hacky solution but with the handicap of no inline styles it's the only thing I can think of:
Add a "style" component to your template. This will be replaced with <style> tags in the DOM. Inside the component add the desired CSS variable to :root
<component :is="`style`">
:root { --progress-bar-width: {{ progressWidth }}; }
</component>
<div class="progress-bar-width"></div>
<style lang="scss" scoped>
.progress-bar-width {
width: var(--progress-bar-width);
}
</style>
how about use inline style?
https://vuejs.org/guide/essentials/class-and-style.html#binding-inline-styles
<div :style="`--progress-bar-width:${progressWidth}`" >
your component
</div>
Related
Summary: I need to style the contents of a <slot>, from the child component. I'm using scoped css and the styles don't apply:
I have the following two components:
<!-- Parent.vue -->
<template>
<h1>{{ msg }} from Parent</h1>
<Child>
<h1>{{ msg }} from Child</h1>
</Child>
</template>
...
<style scoped>
h1 {
color: green;
}
</style>
<!-- Child.vue -->
<template>
<slot></slot>
</template>
...
<style scoped>
h1 {
color: red;
}
</style>
I want the 2nd <h1> to be red, but it's green, since the component is rendered with something like:
<h1 data-v-452d6c4c data-v-2dcc19c8-s>Hello from Child</h1>
<style>
h1[data-v-452d6c4c] {
color: green;
}
h1[data-v-2dcc19c8] {
color: red;
}
</style>
data-v-452d6c4c comes from Parent, and data-v-2dcc19c8-s from Child
If the second attribute, in the <h1> tag, was just data-v-2dcc19c8 the style I wanted would be applied, but since it has that -s suffix (slot?), it doesn't.
I could probably find some other solution with a class or something, but I rarely use <slot> and I want to understand the inner workings. That -s tells me that what I'm trying to do can be dealt with the help of the framework, what am I missing?
A working sample:
https://codesandbox.io/s/condescending-brown-ilfwn
Use the new :slotted selector in Vue 3:
Child.vue
<template>
<slot></slot>
</template>
<script>
export default {
name: "Child",
};
</script>
<style scoped>
:slotted(h1) {
color: red !important;
}
</style>
In Vue 3, child scoped styles don't affect slotted content by default.
In your particular example, the !important modifier is also necessary because the parent also defined an h1 style which would take precedence otherwise
I have an ionic 5 app for which I built each page using the cmd line, so they were created using the correct structure.
However, when I try to run it, the page styles aren't used, even though the browser shows the css file has been loaded.
I have the following in the .ts page:
#Component({
selector: 'app-onboard',
templateUrl: './onboard.page.html',
styleUrls: ['./onboard.page.scss'],
})
The html file:
<body>
<app-onboard>
...lots of other elements
<div class="style1">
</div>
</app-onboard>
</body>
The scss file:
app-onboard {
.style1 {
color: #ff00ff;
}
}
style1 is on an html element, but it is not applied. However, when I delete the app-onboard wrapper, the style is applied i.e.:
.style1 {
color: #ff00ff;
}
Why would the presence of the app-onboard selector prevent the styles from being applied in the page?
There should be a . in front of the app-onboard in the scss file as you're calling the scss class instead of the html tag like so
.app-onboard {
.style1 {
color: #ff00ff;
}
}
Hence the reason why the style only applied once you removed it.
If you wish to use the selector as per your current scss you'll have to change your html file to
<body>
<app-onboard>
...lots of other elements
<div class="style1">
</div>
</app-onboard>
</body>
I'm assuming the html file is outside of the app-onboard component and you're calling the component from it.
Is it possible to override :host-styling of an external angular2-component?
We're making a library including a sidebar-component. This component has a default (fallback) background, but this should be overridable by css/theme used in the app.
#Component({
selector: 'sidebar',
styles: [`
:host { background-color: green; }
`],
template: `
<h1>sidebar</h1>
<ng-content></ng-content>
`
})
export class SideBarComponent { .... }
Main App css:
<style>
sidebar {background: red; color: yellow; }
</style>
This returns a sidebar with green background and yellow text, but I want a red background...
Edited:
As found on http://blog.angular-university.io/how-to-create-an-angular-2-library-and-how-to-consume-it-jspm-vs-webpack/: add an attribute to the body-tag:
<body override>
<app></app>
</body>
And in your css: use a selector for this attribute:
[override] hello-world h1 {
color:red;
}
This way, your css does not have to be parsed.
Previous solution:
I've found a solution myself: instead of linking my (theming) css-file in index.html, which isn't parsed, I imported this particular css-file in the app.component.ts annotation.
index.html:
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet/css" type="text/css" href="/assets/style/app.css" />
</head>
<body>
<app></app>
</body>
</html>
app.component.ts:
import { ... }
#Component({
selector: 'app',
styles: [`
#import "assets/style/theme.css";
`],
template: `
...`,
})
export class AppComponent {...}
theme.css:
sidebar {background: red; }
Its not possible to overwrite styles set in a component's styles this way. See point 3 on the "Using Component Styles" section in the Component Styles docs (https://angular.io/docs/ts/latest/guide/component-styles.html)
Our component's styles cannot be changed by changes to styles
elsewhere in the application.
Using :host-context is probably a nicer way to acheive this (although i have never tried myself).
You should try to check the same with host-context. As per documentation host-context works just like the function form of :host(). It looks for a CSS class in any ancestor of the component host element, all the way up to the document root. It's useful when combined with another selector.
In the following example, we apply a background-color style to all <h2> elements inside the component, only if some ancestor element has the CSS class theme-light.
:host-context(.theme-light) h2 {
background-color: #eef;
}
I am building a Polymer Single Page Interface with a lot of custom elements.
Now I want my elements to have some sort of master style, which I can define in the index.html or my main content element. Think of it like this:
index.html
<style>
.classWhichWillBeUsedInCustomElements {
mainColor: #e0e0e0;
}
</style>
or
<script>
mainColor = "#e0e0e0";
</script>
my-cool-element.html
<polymer-element name="my-cool-element">
<template>
<paper-button style="color: {{mainColor}}"></paper-button>
</template>
</polymer-element>
or
<polymer-element name="my-cool-element">
<template>
<style>
.coolButton {
width: 300px;
color: {{mainColor}};
}
</style>
<paper-button class="coolButton"></paper-button>
</template>
</polymer-element>
Except that this doesn't work.
I have tried:
Creating a global variable window.defaultColor and using it like color: {{defaultColor}};
Using core-style in a parent element, without much luck
Creating a css class in my index.html and calling it in a custom element
What is the right way to achieve this? I am trying to avoid using Less
Use the following pattern in the index.html or a global stylesheet:
<style>
body /deep/ .classWhichWillBeUsedInCustomElements {
mainColor: #e0e0e0;
}
</style>
Then you could use the class within the custom element. The global style will punch the shadow boundary. You could replace body with any other element or selector under which you want to punch the shadow dom boundary.
More on deep here: https://www.polymer-project.org/0.5/articles/styling-elements.html#cat
I have one element that extends another and I'm having trouble getting the styling to override the parent using the example in the documentation. For example, say I want to style the praise in the parent element:
<polymer-element name="polymer-cool">
<template>
<style>
:host #p {
color: red;
}
</style>
You are <span id='p'>{{praise}}</span> <content></content>!
</template>
...
</polymer-element>
but change that in an extension of that element:
<polymer-element name="polymer-cooler" extends="polymer-cool">
<template>
<!-- A shadow element render's the extended
element's shadow dom here. -->
<style>
#p {
color: blue;
}
</style>
<shadow></shadow> <!-- "You are cool Matt" -->
</template>
...
</polymer-element>
You can see in the JSfiddle below, that I haven't been able to change the color of the span#p. I've tried a few other things like
polymer-cooler #p {
color: blue;
}
And tried putting the style inside of the tags, but no luck. Hoping it's possible and I'm just missing something.
http://jsfiddle.net/jamstooks/tpyL9/
Well, this looks like this works. I'd love to get some clarification from someone on whether this is the best way to do this:
<polymer-element name="polymer-cooler" extends="polymer-cool">
<template>
<style>
{
:host::shadow #p
color: blue;
}
</style>
<shadow></shadow>
</template>
...
</polymer-element>
http://jsfiddle.net/jamstooks/tpyL9/4/
EDIT: 7/22/14
Per the comment from Scott below, I have updated the code above from :host /deep/ #p to :host::shadow #p