I am currently integrating Material-UI into a project and exploring their API.
One thing that I find confusing is the notched property within the OutlineInput Component.
<FormControl variant='outlined'>
<OutlinedInput notched={false} />
</FormControl>
Upon changing the notched property from false to true, there seems to be no visible difference in the output.
Considering English isn't my first language, I am struggling to grasp the exact purpose of this property.
The property called notched only becomes visible when used in conjunction with the labelWidth property. If notched is set to true, it creates a gap in the outline for the label when the label's shrink property is also set to true. Typically, there is no necessity to explicitly specify the notched, labelWidth, or shrink properties. If you opt to use TextField instead of the more detailed OutlinedInput, all these intricacies are managed automatically.
Below is an example illustrating this concept:
import React from "react";
import OutlinedInput from "@material-ui/core/OutlinedInput";
import TextField from "@material-ui/core/TextField";
export default function App() {
return (
<div>
<OutlinedInput notched={false} labelWidth={100} />
<br />
<br />
<OutlinedInput notched={true} labelWidth={100} />
<br />
<br />
<TextField variant="outlined" label="The Label" value="The Value" />
<br />
<br />
<TextField
variant="outlined"
InputProps={{ notched: false }}
label="The Label"
value="The Value"
/>
</div>
);
}
https://codesandbox.io/s/outlinedinput-notched-7lphl?fontsize=14&hidenavigation=1&theme=dark
Ryan's Answer is quite informative. However, there have been some changes in the latest version of v5 documentation. The use of the labelWidth prop is no longer supported. Instead, a two-step process is now required for the notch feature.
The method involving a notched prop may seem a bit forced, as it results in a visible notch or whitespace at the top of the input box under all circumstances. If this is your desired outcome, you must include both notched={true} (or simply notched) and
label="Your label text here"<OutlinedInput notched={true} id="test" label="HI" />
In case the notched prop is not explicitly defined, the behavior will be such that the notch only appears when the input is focused. It disappears once the focus is removed, irrespective of any text present in the input field.
A more standard approach involves supplying a label for the input component. This is typically done when creating custom components using Material-UI elements. In this scenario, the notched prop does not need to be specified, as the default behavior suffices. Nevertheless, an additional InputLabel component must be declared, enclosed within a FormControl, for the notch to accommodate the necessary label.
<FormControl>
<InputLabel>Label Text</InputLabel>
<OutlinedInput label="Label Text" />
</FormControl>
The provided code set should effectively implement the label functionality. Nonetheless, it is advisable to include both a for and id attribute for enhanced accessibility with screen readers.
<FormControl>
<InputLabel htmlFor="test" id="testlabel">
Label Text
</InputLabel>
<OutlinedInput id="test" label="Label Text" />
</FormControl>
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