I would like to be able to render the ms fluent-ui as a paragraph instead of the default span for accessibility reasons but the documentation is very unclear on what exact input is expected and in what format. I would expect something like this:
<Text as={<p />}>
test
</Text>
or:
<Text as={(someProps) => <p>{someProps}</p>}>
test
</Text>
Can anyone help me out with how this is supposed to be done?
You are on the right path with second example. The problem is you need React Component instead to return directly <p> tag.
// Custom Paragraph Component
const Paragraph = ({ children }) => <p>{children}</p>
<Text as={Paragraph}>Test</Text>
Codepen working example.
Related
In my application I need to use the same icon in different places.
in v-card-action's button
in a SVG graphic
For the button it is as explained in vuetify documentation:
<v-card-actions>
<v-btn value="previous" color="red" >
<span class="hidden-sm-and-down">Previous</span>
<v-icon right>mdi-arrow-left-circle</v-icon>
</v-btn>
</v-card-actions>
But now, how to use the exact same icon (using it's name) in a custom SVG
<svg viewBox="0 0 100 100">
<rec x="0" y="0" width="100" height="100" stroke="grey" />
<???> mdi-arrow-left-circle </???>
</svg>
First, do i need to use SVG <img>, <text> or <path> primitive ?
Second, how do i get the proper icon from it's name mdi-arrow-left-circle ?
I had the exact same question. This link came in handy when putting this together:
How do I include a font awesome icon in my svg?
Disclaimer: I'm using TS components in Vue and have added Vuetify.
in the template I have a SVG:
<svg>
<text
x="100"
y="100"
class="licon"
fill="red">
{{ content('mdi-close') }}
</text>
</svg>
The content method does this:
content(cls: string): string {
// this copies the content from the pseudo element :before as it's needed to show the icon from material design
const ele = document.querySelector('.' + cls);
if(ele) {
const styles = window.getComputedStyle(ele, ':before');
return styles.content.replaceAll('"', "");
}
return '';
}
The last piece needed was to make sure to use the correct font (include in your stylesheet/etc):
.licon {
font: bold 300px 'Material Design Icons';
}
Hopefully this helps someone else.
I have an array of images that I want to display in a component in react native.
I use map function to iterate over the array and display it. I also have a delete button on top of the image.
The relevant code is :
this.state.imgs.map(function(img,i){
return (
<View style={{alignItems:'center',justifyContent:'center', height:75, width:75, borderRadius:25}}>
<Image style={{position:'absolute',resizeMode:'cover', top:0,left:0, borderRadius:38,height:75, width:75, opacity:0.5}} source={{uri: img.path }} />
<TouchableHighlight onPress={() => this.removeItem(i)}>
<Image style={{}} source={require('./Images/images_asset65.png')} />
</TouchableHighlight>
</View>
);
})
The problem is the TouchableHighlight, where I have an event, when the event fires I get an error regarding "this" (undefined is not a function).
I know this is a scope problem but I cant figure it out.
Is the use of an arrow function is correct here?
If you want to use this inside your map function, you have to change to an arrow function so this points to the outer scope.
this.state.imgs.map((img, i) => {
return (
<View style={{alignItems:'center',justifyContent:'center', height:75, width:75, borderRadius:25}}>
<Image style={{position:'absolute',resizeMode:'cover', top:0,left:0, borderRadius:38,height:75, width:75, opacity:0.5}} source={{uri: img.path }} />
<TouchableHighlight onPress={() => this.removeItem(i)}>
<Image style={{}} source={require('./Images/images_asset65.png')} />
</TouchableHighlight>
</View>
);
})
When you use function keyword in your code, then you lose the context and function creates its own. If you use function it is better not to forget binding these functions with bind(this) so that these functions share the same context. So in your relevant code you should change your last line to }.bind(this)). It is better to remember using bind(this) somehow when using the function keyword, even the better option is not using function and stick with the goodies comes with ES6. Last but not least one should always read docs.
I am working on react-native <MultiSlider> component, but one thing i just want to know, how do i change the value when i am sliding.
Default Value:
Sliding Values:
Code:
constructor() {
super();
this.state = {
priceRange : [0,10],
};
}
sliderOnChangeValue(values){
return(
<Text style={Styles.filter_label_label}>0 - 35,000</Text>
);
}
<View>
<View>
<Text>PRICING</Text>
</View>
<View>
{this.sliderOnChangeValue()}
</View>
</View>
<MultiSlider
values={this.state.priceRange}
sliderLength={300}
onValuesChange={this.sliderOnChangeValue} />
So on the above code i am calling sliderOnChangeValue() function onValuesChange i want to change the <Text> component values on range change.
Please kindly go through my above post and let me know if you find any solution.
Thanks
I recommend you refamiliarize yourself with the basics of React. Your approach is rather fundamentally flawed.
Callback functions cannot render things, they must update your component's state and your render function should output the UI based on state and props.
Follow the React Native Slider example on the docs website. It's nearly exactly what you want.
Try below code:
values={[parseInt(this.state.multiSliderValue[0]), parseInt(this.state.multiSliderValue[1])]}
and notice above code
<MultiSlider
values={[parseInt(this.state.multiSliderValue[0]), parseInt(this.state.multiSliderValue[1])]}
sliderLength={290}
onValuesChangeFinish={this.multiSliderValuesChange}
selectedStyle={{backgroundColor: '#f5a540'}}
min={16}
markerStyle={{backgroundColor: '#f5a540'}}
max={99}
step={1}
snapped
/>
Its working with me.
Let's say I have an SVG element with paths for all US states.
<svg>
<g id="nh">
<title>New Hampshire</title>
<path d="m 880.79902,142.42476 0.869,-1.0765 1.09022,..." id="NH" class="state nh" />
</g>
...
</svg>
The SVG data is saved in a separate file with a .svg extension. Say I want to create a React component of that map, with complete control over it so that I can modify the styling of individual states based on some external input.
Using Webpack, as far as I can tell, I have two options for loading the SVG markup: Insert it as raw markup using the raw-loader and create a component using dangerouslySetInnerHTML:
var InlineSvg = React.createClass({
render() {
var svg = require('./' + this.props.name + '.svg');
return <div dangerouslySetInnerHTML={{__html: svg}}></div>;
}
});
or manually convert the markup to valid JSX:
var NewComponent = React.createClass({
render: function() {
return (
<svg>
<g id="nh">
<title>New Hampshire</title>
<path d="m 880.79902,142.42476 0.869,-1.0765 1.09022,..." id="NH" className="state nh" />
</g>
...
</svg>
);
});
Finally, let's say that in addition to the SVG map, there's a simple HTML list of all the states. Whenever a user hovers over a list item, the corresponding SVG path should shift fill color.
Now, what I can't seem to figure out is how to update the React SVG component to reflect the hovered state. Sure, I can reach out into the DOM, select the SVG state by classname and change its color, but that doesn't seem to be the "react" way to do it. A pointing finger would be much appreciated.
PS. I'm using Redux to handle all communication between components.
You need to do two things:
1) Set an event listener on each list item to inform your app of the highlighted item.
<li
onMouseOver={() => this.handleHover('NH')}
onMouseOut={() => this.handleUnhover()}
>
New Hampshire
</li>
2) Capture the data, and propagate it your SVG component.
This is the more complicated part, and it comes down to how you've structured your app.
If your entire app is a single React component, then handleHover would simply update the component state
If your app is divided into multiple components, then handleHover would trigger a callback passed in as a prop
Let's assume the latter. The component methods might look like this:
handleHover(territory) {
this.props.onHighlight(territory);
}
handleUnhover() {
this.props.onHighlight(null);
}
Assuming you have a parent component, which contains both the SVG map and the list, it might look something like this:
class MapWrapper extends React.Component {
constructor(props) {
super(props);
this.state = {
highlighted: null;
};
}
setHighlight(territory) {
this.setState({
highlighted: territory
});
}
render() {
const highlighted = { this.state };
return (
<div>
<MapDiagram highlighted={highlighted} />
<TerritoryList onHighlight={(terr) => this.setHighlight(terr)} />
</div>
);
}
}
The key here is the highlighted state variable. Every time a new hover event occurs, highlighted changes in value. This change triggers a re-render, and the new value is passed onto MapDiagram which can then determine which part of the SVG to highlight.
My goal is to convert code from Angular 1.3 to Angular 2 (with SVG in both cases).
I tried the following simple test code, which works in case #1 that does not involve interpolation, but does not work in case #2 (which uses interpolation), and AFAICS the only difference in the generated SVG code is the inclusion of an extra attribute in the element: class="ng-binding"
Is there a way to suppress the preceding class attribute, or is there another solution?
Btw I wasn't able to get the formatting quite right (my apologies).
Contents of HTML Web page:
<html>
<head>
<title>SVG and Angular2</title>
<script src="quickstart/dist/es6-shim.js"></script>
</head>
<body>
<!-- The app component created in svg1.es6 -->
<my-svg></my-svg>
<script>
// Rewrite the paths to load the files
System.paths = {
'angular2/*':'/quickstart/angular2/*.js', // Angular
'rtts_assert/*': '/quickstart/rtts_assert/*.js', // Runtime assertions
'svg': 'svg1.es6' // The my-svg component
};
System.import('svg');
</script>
</body>
</html>
Contents of the JS file:
import {Component, Template, bootstrap} from 'angular2/angular2';
#Component({
selector: 'my-svg'
})
#Template({
//case 1 works:
inline: '<svg><ellipse cx="100" cy="100" rx="80" ry="50" fill="red"></ellipse></svg>'
//case 2 does not work:
//inline: "<svg>{{graphics}}</svg>"
})
class MyAppComponent {
constructor() {
this.graphics = this.getGraphics();
}
getGraphics() {
// return an array of SVG elements (eventually...)
var ell1 =
'<ellipse cx="100" cy="100" rx="80" ry="50" fill="red"></ellipse>';
return ell1;
}
}
bootstrap(MyAppComponent);
SVG elements do not use the same namespace as HTML elements. When you insert SVG elements into the DOM, they need to be inserted with the correct SVG namespace.
Case 1 works because you are inserting the whole SVG, including the <svg> tags, into the HTML. The browser will automatically use the right namespace because it sees the <svg> tag and knows what to do.
Case 2 doesn't work because you are just inserting an <ellipse> tag and the browser doesn't realise it is supposed be created with the svg namespace.
If you inspect both SVGs with the browser's DOM inspector, and look at the <ellipse> tag's namespace property, you should see the difference.
You can use outerHtml of an HTML element like:
#Component({
selector: 'my-app',
template: `
<!--
<svg xmlns='http://www.w3.org/2000/svg'><ellipse cx="100" cy="100" rx="80" ry="50" fill="red"></ellipse></svg>
-->
<span [outerHTML]="graphics"></span>`
})
export class App {
constructor() {
this.graphics = this.getGraphics();
}
getGraphics() {
// return an array of SVG elements (eventually...)
var ell1 =
'<svg><ellipse cx="100" cy="100" rx="80" ry="50" fill="red"></ellipse></svg>';
return ell1;
}
}
note that the added string has to contain the <svg>...</svg>
See also How can I add a SVG graphic dynamically using javascript or jquery?