Question
Answer and Explanation
The `capitalize` function in MUI (Material-UI) is not a direct built-in function within the core MUI library itself. Instead, when developers talk about "capitalize" in the context of MUI, they're often referring to methods of text manipulation they use within their styling of components in MUI. These techniques typically employ JavaScript string methods, specifically methods like `.toUpperCase()`, `.toLowerCase()`, and other character manipulation.
Let's delve deeper into typical use cases.
How is it used?
The `capitalize` method would transform text into Capitalized text, meaning first letter of every word should be in capital letter, the rest in lower case. MUI doesn't provide this kind of transformation directly, so this would need to be added separately.
This could look like below. Remember, this method is an added transformation and is not MUI native functionality.
function capitalizeText(str) {
if (!str) return '';
return str.toLowerCase().split(' ').map(word => word.charAt(0).toUpperCase() + word.slice(1)).join(' ');
}
Applying with Styles
When working with MUI components and styles, you can embed this `capitalizeText` functionality directly with the `sx` props or within `styled()` components as below:
import { Typography, styled } from '@mui/material';
const StyledText = styled(Typography)(({ theme }) => ({
textTransform: 'capitalize'
}));
function capitalizeText(str) {
if (!str) return '';
return str.toLowerCase().split(' ').map(word => word.charAt(0).toUpperCase() + word.slice(1)).join(' ');
}
function MyComponent() {
const textToTransform = "hello from the mui world";
return (
<StyledText > {capitalizeText(textToTransform)} < StyledText />
);
}
In essence, while MUI does not provide a built-in "capitalize" function, developers leverage standard JavaScript techniques to achieve text capitalization within the context of styling MUI components. Always remember, `textTransform: capitalize` from CSS only does a very simple capitalization and will only capitalize first letter of the whole string, this is different from our code sample above. Using correct `textTransform` in CSS would mean you would capitalize first letter of the sentence, so for each different text node (a "line of text").