Unable to override Material-UI theme styles - css

I'm using Material-UI in a project and I am trying to override the default theme style of textTransform:"uppercase", and instead, replace it with textTransform:"capitalize".
Consulting the docs on custom styling informed me that I should use inline styles or a custom class.
Adding className="capitalize" (which has as a text-transform property in the class) or adding style={{textTransform: "capitalize"}} produces the same result. The parent div is passed the CSS property, but is ultimately overridden by a child span.
Is this intended behavior, or am I doing something wrong?

You can use a custom theme to override the textTransform:
const App = () => {
const customTheme = { button: { textTransform: 'capitalize' } };
return (
<MuiThemeProvider muiTheme={getMuiTheme(customTheme) }>
<Example />
</MuiThemeProvider>
)
};
Working jsFiddle: https://jsfiddle.net/88uq8751/7/

Please give more info in you question.
However,I think this is not intended behaviour. I guess, check your other props, maybe with those props the effect of style props is getting overrided.
Still if that is not the cause, check the material-ui repo codebase on GitHub. From my experience working with material-ui, many problems I solved by going through their codebase and not using their doc. Hope the info helps.

Related

How to dynamically add classes to NextJS component using class names from CMS?

I am looking for a solution that will allow some styling options in a CMS that can dynamically change the classes of specific components in my NextJS app. My code looks like this:
pages/index.js:
...
import client from "../lib/client";
const Home = ({ headerConfig }) => {
return (
<>
<Header headerConfig={headerConfig} />
...
</>
);
};
export const getServerSideProps = async () => {
const headerConfig = await client.getDocument("headerConfig");
return {
props: { headerConfig },
};
};
export default Home;
components/Header.jsx:
const Header = ({ headerConfig }) => {
return (
<nav className={`relative ... ${headerConfig.bgColour}`}>
...
</nav>
);
}
export default Header
However, the styling does not apply and the background colour remains unchanged although the class does seem to be injected into the class attribute on the browser.
I know my current method is incorrect but I am clueless as to how to fix this. Could someone help point me in the right direction?
I assume that you are using tailwind. If so, you cannot inject classnames into an html element. This is because tailwind only includes classes that are explicitly declared somewhere within your code (it will find classes within any string in your project depending on the configuration). You can get around this problem by adding classes to the safelist array in your tailwind.config.js file. You can also safelist classes with regex to allow all variants of certain utilities.
However, safelisting only works if there are a specific set of classes that could potentially be injected. One option, which will be guaranteed to work but NOT RECOMMENDED, is to add a <link> in your html to the tailwind cdn. However this will include every single tailwind class in your css bundle, making it MUCH larger and your website slower.
Another solution is to use inline styles which are calculated with javascript depending on the classes you need to inject. If you are dealing with only simple parts of tailwind (like padding, margin, or other sizing units), this may be a good approach. For example a class like p-4 would get converted to padding: 1rem in your inline styles.
Depending on the needs of your application, one of these three approaches is probably the way to go. Hope this helps!

How to use :-ms-reveal as inline style in react?

I'm trying to hide the eye(Password Reveal control) which appear while entering password in inputbox in Microsoft Edge. For hiding it, we need to use :-ms-reveal. I tried to use it like MsReveal in inline style of react, but didn't work. Due to CSS file restrictions, I need to use inline styles in my project. So could anyone help me in resolving this issue?
It took almost a day to find the solution which I was looking for. Scenario was if you don't want to use 3rd party packages like Radium or Emotion (css-to-js), you can follow below method.
Use Template Literals for adding your code.
const inputFieldStyle = `
.inputField::-ms-reveal{
display: 'none'
}`
Then you can use <style> tag where you pass above style like below:
const reactFunctionalComponent = (props) => {
...
return(
<>
<style>
{inputFieldStyle}
</style>
...
</>
)
}

How would I apply Material-UI managed styles to non-material-ui, non-react elements?

I have an application where I'm using Material UI and its theme provider (using JSS).
I'm now incorporating fullcalendar-react, which isn't really a fully fledged React library - it's just a thin React component wrapper around the original fullcalendar code.
That is to say, that I don't have access to things like render props to control how it styles its elements.
It does however, give you access to the DOM elements directly, via a callback that is called when it renders them (eg. the eventRender method).
Here's a basic demo sandbox.
Now what I'm wanting to do is make Full Calendar components (eg, the buttons) share the same look and feel as the rest of my application.
One way to do this, is that I could manually override all of the styles by looking at the class names it's using and implementing the style accordingly.
Or - I could implement a Bootstrap theme - as suggested in their documentation.
But the problem with either of these solutions, is that that:
It would be a lot of work
I would have synchronisation problems, if I made changes to my MUI theme and forgot to update the calendar theme they would look different.
What I would like to do is either:
Magically convert the MUI theme to a Bootstrap theme.
Or create a mapping between MUI class names and the calendar class names, something like:
.fc-button = .MuiButtonBase-root.MuiButton-root.MuiButton-contained
.fc-button-primary= .MuiButton-containedPrimary
I wouldn't mind having to massage the selectors etc to make it work (ie. For example - MUI Buttons have two internal spans, whereas Full Calendar have just one). It's mostly about when I change the theme - don't want to have to change it in two places.
Using something like Sass with its #extend syntax would is what I have in mind. I could create the full-calendar CSS with Sass easily enough - but how would Sass get access to the MuiTheme?
Perhaps I could take the opposite approach - tell MUI 'Hey these class names here should be styled like these MUI classes'.
Any concrete suggestions on how I would solve this?
Here is my suggestion (obviously, it's not straight forward). Take the styles from the MUI theme and generate style tag based on it using react-helmet. To do it event nicely, I created a "wrapper" component that do the map. I implemented only the primary rule but it can be extended to all the others.
This way, any change you will do in the theme will affect the mapped selectors too.
import React from "react";
import { Helmet } from "react-helmet";
export function MuiAdapter({ theme }) {
if (!theme.palette) {
return <></>;
}
return (
<Helmet>
<style type="text/css">{`
.fc-button-primary {
background: ${theme.palette.primary.main}
}
/* more styles go here */
`}</style>
</Helmet>
);
}
And the use of the adapter
<MuiAdapter theme={theme} />
Working demo: https://codesandbox.io/s/reverent-mccarthy-3o856
You could create a mapping between MUI class names and the calendar class names by going through ref's. It's possible that this is not what some would call "best practice"...but it's a solution :). Note that I updated your component from a functional component to a class component, but you could accomplish this with hooks in a functional component.
Add refs
Add a ref to the MUI element you want to set as a reference, in your case the Button.
<Button
color="primary"
variant="contained"
ref={x => {
this.primaryBtn = x;
}}
>
And a ref to a wrapping div around the component you want to map to. You can't add it directly to the component since that wouldn't give us access to children.
<div
ref={x => {
this.fullCal = x;
}}
>
<FullCalendar
...
/>
</div>
Map classes
From componentDidMount() add whatever logic you need to target the correct DOM node (for your case, I added logic for type and matchingClass). Then run that logic on all FullCalendar DOM nodes and replace the classList on any that match.
componentDidMount() {
this.updatePrimaryBtns();
}
updatePrimaryBtns = () => {
const children = Array.from(this.fullCal.children);
// Options
const type = "BUTTON";
const matchingClass = "fc-button-primary";
this.mapClassToElem(children, type, matchingClass);
};
mapClassToElem = (arr, type, matchingClass) => {
arr.forEach(elem => {
const { tagName, classList } = elem;
// Check for match
if (tagName === type && Array.from(classList).includes(matchingClass)) {
elem.classList = this.primaryBtn.classList.value;
}
// Run on any children
const next = elem.children;
if (next.length > 0) {
this.mapClassToElem(Array.from(next), type, matchingClass);
}
});
};
This is maybe a little heavy handed, but it meets your future proof requirement for when you updated update Material UI. It would also allow you to alter the classList as you pass it to an element, which has obvious benefits.
Caveats
If the 'mapped-to' component (FullCalendar) updated classes on the elements you target (like if it added .is-selected to a current button) or adds new buttons after mounting then you'd have to figure out a way to track the relevant changes and rerun the logic.
I should also mention that (obviously) altering classes might have unintended consequences like a breaking UI and you'll have to figure out how to fix them.
Here's the working sandbox: https://codesandbox.io/s/determined-frog-3loyf

How to apply custom styles for taking a screenshot of DOM in Reactjs with html2canvas

I have a web application where I need to take a screenshot of the particular DIV element with some styles. But I need those styles has to be applied in screenshot also. How can I achieve this?
Below is my piece of code:
printDocument(divid) {
const input = document.getElementById(divid);
html2canvas(input).then(canvas => {
const imgData = canvas.toDataURL("image/png");
this.saveAs(imgData, "screenshot.png");
});
}
I have applied some styles for web purpose. I need these styles has to be applied for screenshot also. Thanks in advance.
Try to use dom-to-image(https://github.com/tsayen/dom-to-image) in this context, it helps you apply the styles in image.

Unload/remove dynamically loaded css files

After loading a css file like this:
const themes = ['dark-theme.css', 'light-theme.css'];
async function loadcss(file) {
return await import(file);
}
loadcss(themes[0]).then(console.log)
The console output is an empty object for me and a new annonymous < style> tag sits in the < head> of my index.html. So far so good, but what if I (in this example) want to change the theme to light-theme.css. That would merge both themes as dark-theme.css is already loaded.
Is there a way to remove the < style> tag from the DOM?
To furthermore specify my question, the provided example shows an abstracted behaviour and I am only interested in removing the dynamically loaded css from the DOM.
I don't know vue.js but here is simple example in React hope it helps somehow :) perhaps some ideas at least :)
class TodoApp extends React.Component {
static themes = {
dark: 'dark-theme.css',
light: 'light-theme.css',
};
render() {
return ReactDOM.createPortal(
(<link rel="stylesheet" href={TodoApp.themes.dark} type="text/css"></link>),
document.head
);
}
}
ReactDOM.render(<TodoApp />, document.querySelector("#app"))
http://jsfiddle.net/3y4hw2ox/
Thanks to OZZIE, I questioned my methodology and found, that importing the css files, like my question shows (through ES6 import, or require.context(...)), is not usefull, as we can't identify it, we dont get access to the <style> element, leaving us with no entry to the DOM and no way to manipulate it.
Instead we will link the css files manually in the <head>, as we know their name and path.
const themes = ['dark-theme.css', 'light-theme.css'];
const head = document.body.parentElement.firstElementChild;
const link = document.createElement('link');
link.setAttribute('href', process.env.BASE_URL + themes[0]);
link.setAttribute('id', themes[0]); // set id so we can remove it later
head.appendChild(link);

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