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How to replace a string with another and with a different colour in ReactJS?


By : Sean Li
Date : September 17 2020, 10:00 PM
help you fix your problem I have a string mapped from an array and I have used a regexp to return particular text. I want this particular text to have a different color when it is rendered. However the current approach fails as it wont let me just set the style of the string in pure javascript. Is there a way around fixing this so the replace can work with the new text as a different colour. , to @Jayce444 for the solution:
code :
{this.state.dataReplies.map((n, i) => {
            var re = /@(\S+)\b/g;
            let oldstr = n.description.match(re);
            let str = n.description.replace(oldstr, "");
    return (
      <p> <span style={{color: "#0066ff"}}>{oldstr}</span> {str}</p>
    );
})}


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Batch replace colour images, except a specific colour on Linux


By : sathya
Date : March 29 2020, 07:55 AM
will be helpful for those in need The "+opaque color" option will select all colors except the named one, and turn them to the fill color. Thus,
code :
mogrify -fill red +opaque white *.png

Check string for array elements and systematically replace them with HTML tags - (JS, ReactJS)


By : cjddlr
Date : March 29 2020, 07:55 AM
it helps some times I created a component that will replace the elements that need to be highlighted with a span you can test it here
The component is:
code :
import React from 'react';

export default ({ terms, children }) => {
  const result = []
  const regex = terms.map(escapeRegExp).join('|');
  const re = new RegExp(regex);
  let text = (' ' + children).slice(1); // copy
  let match = re.exec(text);
  while (match != null) {
    const str = match.toString();
    result.push(text.slice(0, match.index));
    result.push(<span className="highlighted">{str}</span>);
    text = text.slice(match.index + str.length);
    match = re.exec(text);
  }
  result.push(text);
  return result;
}

function escapeRegExp (str) {
  return str.replace(/[-[\]/{}()*+?.\\^$|]/g, "\\$&");
}
import React from 'react';
import Highlighter from './Highlighter';

const terms = [ '{{input1}}', '{{input2}}' ]

const App = () => (
  <div>
    <Highlighter terms={terms}>
      {'this is a message with many inputs, {{input1}}, {{input2}}, and again {{input1}}'}
    </Highlighter>
  </div>
);

How to change semantic ui icon colour to defined colour in ReactJs?


By : CharanMann
Date : March 29 2020, 07:55 AM
I wish did fix the issue. It is not possible to accomplish what you are trying to do with props. Additionally, the color css attribute you are trying to apply does not accept a path.
You can probably accomplish this with the icons in Semantic UI but your solution may not work as expected in all browsers. You'll need to know that the icons in Semantic UI are actually a font (from FontAwesome). Therefore, you can't use any SVG solutions unless you bring your own SVG based icon components.

Reactjs random colour picker - wow there must be an easier way?


By : adoxner
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , i've build a simple app that lets you click on coloured dots and change each of their colours randomly, also supplying the rgb code. Im a react beginner so just playing around to get an idea. , The quickest way to improve your code would be like so:
code :
updateHandler(container){
  const newState = {}
  newState[container + "1"] = this.colourCreator()
  newState[container + "2"] = this.colourCreator()
  newState[container + "3"] = this.colourCreator()
  this.setState(newState)
}
<Colour
      clicked={() => this.updateHandler("c")}
      c1={this.state.c1.toString()}
      c2={this.state.c2.toString()}
      c3={this.state.c3.toString()}
      id={'c'}
    />

How to replace a string in parameters from query with variables in ReactJS


By : Dharsh_Thenu
Date : March 29 2020, 07:55 AM
like below fixes the issue I have a project where I put a static query on the database as a string. , Here is an working example:
code :
import React from "react";
import { Map as LeafletMap, TileLayer, Marker, Popup } from "react-leaflet";
import L from "leaflet";
import {
ComposedChart,
Bar,
Area,
Line,
XAxis,
YAxis,
CartesianGrid,
Tooltip,
Legend
} from "recharts";
import "./App.css";

const customMarker = new L.Icon({
iconUrl:
    "https://unpkg.com/browse/leaflet@1.5.1/dist/images/marker-shadow.png",
iconSize: [25, 41],
iconAnchor: [10, 41],
popupAnchor: [2, -40]
});

class Map extends React.Component {
state = {
    date: new Date()
};

constructor() {
    super();
    this.state = {
    coords: [
        { lat: 41.19197, lng: 25.33719 },
        { lat: 41.26352, lng: 25.1471 }
    ],
    zoom: 8,
    minZoom: 7,
    maxZoom: 9,
    dats: null,
    loading: true,
    dataAPI: null,
    temp: null
    };
    this.getURL = this.getURL.bind(this);
}

getURL = (id) => `http://192.168.0.1:8000/?date=2019-10-20&id=${id}&daysForward=2`;

async componentDidMount() {    
    const response = await fetch(this.getURL(4));
    let data = await response.json();
    this.setState({ dataAPI: data.aladinModel[0], loading: false });
    this.setState({ temp: data.aladinModel[0], loading: false });
    this.setState({ dats: data.aladinModel[0], loading: false });
}

render() {
    const { coords, zoom } = this.state;
    return (
    <LeafletMap
        center={[42.733883, 25.48583]}
        zoom={zoom}
        minZoom={this.state.minZoom}
        maxZoom={this.state.maxZoom}
        style={{ height: "100vh", width: "100vw" }}
    >
        <TileLayer
        attribution='&copy; <a href="http://plovdiv.meteo.bg">НИМХ - Пловдив</a> '
        url="https://{s}.tile.osm.org/{z}/{x}/{y}.png"
        />

        {coords.map(({ lat, lng }, index) => (
        <Marker position={[lat, lng]} icon={customMarker} key={index}>
            <div className="leaflet-popup-content">
            <Popup maxWidth="1000" maxHeight="auto">
                <div className="chart">
                <br />
                <br />
                Температура °C
                <ComposedChart
                    width={400}
                    height={200}
                    data={this.state.dats}
                    margin={{
                    top: 20,
                    right: 0,
                    left: 0,
                    bottom: 20
                    }}
                >
                    <CartesianGrid stroke="#f5f5f5" />
                    <XAxis dataKey="DATS" />
                    <YAxis />
                    <Tooltip />
                    <Legend />
                    <Line
                    type="monotone"
                    dataKey="TA"
                    fill="#f70000"
                    stroke="#f56200"
                    />
                </ComposedChart>
                </div>
                {this.getURL(index + 1)} is for popup with lat: {lat} and lon {lng}
            </Popup>
            </div>
        </Marker>
        ))}
    </LeafletMap>
    );
}
}

export default Map;
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