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Access-Control-Allow-Origin

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Written by: Stanko Milosev
Category: Chrome
Published: 05 January 2020
Last Updated: 05 January 2020
Hits: 3259
In order to disable error:

Access to XMLHttpRequest at 'http://test:2021/api/GoogleMaps' from origin 'http://gallery.milosev.com:9090' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

In Windows 10 first kill the chrome:

taskkill /F /IM chrome.exe

Start chrome like:

"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --disable-web-security --disable-gpu --user-data-dir=~/chromeTemp --allow-file-access-from-file.

Path to a node

Details
Written by: Stanko Milosev
Category: Chrome
Published: 08 September 2018
Last Updated: 08 September 2018
Hits: 4271
Since I like web scrapping, my latest project you can see here, always I need to find a path to a specific node. Chrome make it easy:

"ontouchstart" in document.documentElement Window 8 vs Window 7

Details
Written by: Stanko Milosev
Category: Chrome
Published: 23 February 2015
Last Updated: 18 August 2015
Hits: 7067

If you try, in Google Chrome under Windows 8, to execute following statement:

if ("ontouchstart" in document.documentElement) {
console.log("You can touch me")
} else {
console.log("Cant touch this")
}

or as jsLint recommends:

if (document.documentElement.ontouchstart !== undefined) {
console.log("You can touch me")
} else {
console.log("Cant touch this")
}

(document.documentElement.ontouchstart is null if it exists, that is why we have to compare it with undefined, just don't use hasOwnProperty because it seems that it doesn't work on Android devices)

return value will be true, in Windows 7 return value is false

Few more things which you can test:

iOS (iphone/ipad) console:

typeof window.Touch
"object"

Windows 8 VM, Chrome Stable console:

typeof window.Touch
"function"

OSX, Chrome Stable, Safari latest, console:

typeof window.Touch
"undefined"

Taken from here.

In order to disable touch events on google chrome go to:

chrome://flags/

search for:

Enable touch events Mac, Windows, Linux, Chrome OS

Choose disable.

Simple example of google maps

Details
Written by: Stanko Milosev
Category: HTML
Published: 05 January 2021
Last Updated: 05 January 2021
Hits: 2935
  • google maps
Here I want to have simplest example of google maps (in order to be able to copy paste it :) )
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <script defer type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=yourKey&callback=initMap"></script>
    <title></title>
</head>
<body>

    <div id="map-canvas"></div>

    <script>
        function initMap() {
            var mapCanvas = document.getElementById('map-canvas');
            var mapOptions = {
                zoom: 6,
                center: { lat: -34.397, lng: 150.644},
                mapTypeId: google.maps.MapTypeId.ROADMAP
            };

            map = new google.maps.Map(mapCanvas, mapOptions);
        }
    </script>

<style>
    html, body {
        width: 100%;
        height: 100%;
        margin: 0;
        padding: 0;
    }

    #map-canvas {
        width: 100%; 
        height: 100%; 
    }
</style>

</body>
</html>
  1. Twitter cards
  2. Facebook open graph
  3. Responsive Images
  4. Wrap table row to the next line

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