Category: JavaScript Answers

Sometimes, we want to make Google maps responsively resize with JavaScript.

In this article, we’ll look at how to make Google maps responsively resize with JavaScript.

How to make Google maps responsively resize with JavaScript?

To make Google maps responsively resize with JavaScript, we add a resize event listener.

For instance, we write

let map;

const initialize = () => {
  const mapOptions = {
    center: new google.maps.LatLng(40.5472, 12.282715),
    zoom: 6,
    mapTypeId: google.maps.MapTypeId.ROADMAP,
  };
  map = new google.maps.Map(document.getElementById("map-canvas"), mapOptions);
};

google.maps.event.addDomListener(window, "load", initialize);
google.maps.event.addDomListener(window, "resize", () => {
  const center = map.getCenter();
  google.maps.event.trigger(map, "resize");
  map.setCenter(center);
});

to define the initialize function that creates the map.

We create a Map object from the element we get with getElementById.

Then we call addDomListener to listen for window resize by calling it with window and 'resize'.

And then we call trigger and map and 'resize' to resize the map when the screen resizes.

Conclusion

To make Google maps responsively resize with JavaScript, we add a resize event listener.

Sometimes, we want to fix "google is not defined" when using Google Maps V3 in Firefox remotely with JavaScript.

In this article, we’ll look at how to fix "google is not defined" when using Google Maps V3 in Firefox remotely with JavaScript.

How to fix "google is not defined" when using Google Maps V3 in Firefox remotely with JavaScript?

To fix "google is not defined" when using Google Maps V3 in Firefox remotely with JavaScript, we add the scripts for the Google Maps API.

For instance, we write

<script
  src="https://maps.googleapis.com/maps/api/js?sensor=false"
  type="text/javascript"
></script>

to add the Google Maps API script into our code with a script tag.

Conclusion

To fix "google is not defined" when using Google Maps V3 in Firefox remotely with JavaScript, we add the scripts for the Google Maps API.

Sometimes, we want to get files from file input with JavaScript.

In this article, we’ll look at how to get files from file input with JavaScript.

How to get files from file input with JavaScript?

To get files from file input with JavaScript, we use the file input’s files property.

For instance, we write

inputElement.onchange = (event) => {
  const fileList = inputElement.files;
  //...
};

to set the inputElement.onchange property to a function that’s called when the file selection changes.

In it, we get the files selected from the inputElement.files property as an iterable files list object.

Conclusion

To get files from file input with JavaScript, we use the file input’s files property.

To set Highcharts chart maximum yAxis value with JavaScript, we set the yAxis.max property.

For instance, we write

const chart = new Highcharts.Chart({
  chart: {
    renderTo: "container",
  },
  xAxis: {
    categories: [
      "Jan",
      "Feb",
      "Mar",
      "Apr",
      "May",
      "Jun",
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec",
    ],
  },
  yAxis: {
    max: 200,
    min: -200,
  },
  series: [
    {
      data: [2, 4, 5, 6, 7, 8, 9, 0, 21, 3, 3, 4],
    },
  ],
});

to set the yAxis.max property to set the max value of the y-axis.

Conclusion

To set Highcharts chart maximum yAxis value with JavaScript, we set the yAxis.max property.

Sometimes, we want to save base64 string as PDF at client side with JavaScript.

In this article, we’ll look at how to save base64 string as PDF at client side with JavaScript.

How to save base64 string as PDF at client side with JavaScript?

To save base64 string as PDF at client side with JavaScript, we create a link.

For instance, we write

const downloadPDF = (pdf) => {
  const linkSource = `data:application/pdf;base64,${pdf}`;
  const downloadLink = document.createElement("a");
  const fileName = "abc.pdf";
  downloadLink.href = linkSource;
  downloadLink.download = fileName;
  downloadLink.click();
};

to define the downloadPDF function.

In it, we create a link with createElement.

Then we set its href property to the path with the PDF.

Next, we set the download property to the name of the downloaded file.

Then we call click to download the file.

Conclusion

To save base64 string as PDF at client side with JavaScript, we create a link.