Category: JavaScript Answers

Sometimes, we want to add multiple markers with Infowindows with Google Maps API.

In this article, we’ll look at how to add multiple markers with Infowindows with Google Maps API.

How to add multiple markers with Infowindows with Google Maps API?

To add multiple markers with Infowindows with Google Maps API, we can create a function that returns the mouseover listener callback.

For instance, we write

const infowindow = new google.maps.InfoWindow();

google.maps.event.addListener(
  marker,
  "mouseover",
  ((marker) => {
    return () => {
      const content = address;
      infowindow.setContent(content);
      infowindow.open(map, marker);
    };
  })(marker)
);

to use the InfoWindow constructor to create an infoWindow.

Then we call addListener to add a mouseover event listener to the marker.

Then callback is the function returned by calling the anonymous function with marker.

The function sets the content of the infoWindow and open on the map over the marker with open.

Conclusion

To add multiple markers with Infowindows with Google Maps API, we can create a function that returns the mouseover listener callback.

Sometimes, we want to load JSON data from local file into React.

In this article, we’ll look at how to load JSON data from local file into React.

How to load JSON data from local file into React?

To load JSON data from local file into React, we can import them directly.

For instance, we write

import myData from "./data.json";

to import the JSON object in data.json as the myData object.

Conclusion

To load JSON data from local file into React, we can import them directly.

Sometimes, we want to split JavaScript array in chunks using Lodash.

In this article, we’ll look at how to split JavaScript array in chunks using Lodash.

How to split JavaScript array in chunks using Lodash?

To split JavaScript array in chunks using Lodash, we can use the chunk function.

For instance, we write

const data = [
  "a1",
  "a2",
  "a3",
  "a4",
  "a5",
  "a6",
  "a7",
  "a8",
  "a9",
  "a10",
  "a11",
  "a12",
  "a13",
];
const chunks = _.chunk(data, 3);
console.log(chunks);

to call chunks with the data array and 3 to split the data array into array chunks of 3 and return the split array.

Conclusion

To split JavaScript array in chunks using Lodash, we can use the chunk function.

Sometimes, we want to generate a short UID like "aX4j9Z" in JavaScript

In this article, we’ll look at how to generate a short UID like "aX4j9Z" in JavaScript.

How to generate a short UID like "aX4j9Z" in JavaScript?

To generate a short UID like "aX4j9Z" in JavaScript, we can use the nanoid package.

To install it, we run

npm i nanoid

Then we write

import { nanoid } from "nanoid";

console.log(nanoid(11));

to call nanoid with 11 to return a random string with 11 characters.

Conclusion

To generate a short UID like "aX4j9Z" in JavaScript, we can use the nanoid package.

Sometimes, we want to generate random string for div ID with JavaScript.

In this article, we’ll look at how to generate random string for div ID with JavaScript.

How to generate random string for div ID with JavaScript?

To generate random string for div ID with JavaScript, we can create a random base64 string.

To do this, we write

const id = btoa(Math.random()).substring(0, 12);

to call Math.random to create a random number between 0 and 1.

Then we call btoa on the returned number to convert it to a base64 string.

Next, we call substring with 0 and 12 to return a string with the first 12 characters of the base64 string.

Conclusion

To generate random string for div ID with JavaScript, we can create a random base64 string.