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Storage event handlers only fire if the storage event triggered by another window. You can try to run the following code:// event handler window.addEventListener('storage', storageEventHandlerFunc, false); function storageEventHandlerFunc(evt) { alert("Storage event called key: " + event.key ); switch(event.key){ case 'one': case 'two': batteryDCMeter(); break; case 'extPowerOn': rechargeBattery(); break; } } sessionStorage.setItem("someKey", "someValue");
Absolutely positioning will not conflict with flex containers. You need to set the parent width and values as well:.parent { display: flex; justify-content: center; position: absolute; width:100% }The following is the HTML: text
Polymer.js is a JavaScript library created by Google that allows reusing the HTML elements for building applications with components.To achieve this index, you need to set the index as:{{displayIndex(index)}}The displayIndex would be:function (index) { return index + 1; }Let us see it in an example:Subject {{displayIndex(index)}}
To avoid the Flexbox layout issue, you need to add the following:* { flex-shrink: 0; min-width: 0; min-height: 0; }Here, flex-shrink: 1 - Flex items are allows to shrinkmin-width: 0 - flex items to shrink past their content
You need to create an image object in JavaScript after that set the src.However, you need to wait for the load event before drawing.The following is the canvas:var canvas = document.getElementById("myCanvas"); var context = canvas.getContext("2d"); var myImg = new Image(); img.onload = function() { context.drawImage(myImg, 0, 0); }; img.src = 'https://www.tutorialspoint.com/images/seaborn-4.jpg?v=2';
To enhance the performance of Canvas with particles bouncing around, try the following:Separate the calculations from the drawing.Request a redraw after you have updated your calculations.Optimize collision detection by not testing evert particle against each other.Reduce callback usage.Reduce function calls.Inline.
Both are same in terms of matching elements. Let us see an example: If you have CSS rules with both selectors matching the same elements, then your div: not(:first-of-type) will get precedence due to the: first-of-type pseudo-class.
To filter search results, use the element. The header should be in the section of the search results: Search results
Use Mediaplayer of Android for playing audio. You need to call function of Android from JavaScript that you have written in HTML file.WebView wv = (WebView) findViewById(R.id.webview); wv.addJavascriptInterface(new WebAppInterface(this), "Android"); public class WebAppInterface { Context mContext; WebAppInterface(Context c) { mContext = c; } @JavascriptInterface public void showToast(String toast) { Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show(); } }The following is my JavaScript: function showAndroidToast(toast) { Android.showToast(toast); }
To set focus on a text input in a list, try the following code:newApp.directive('focus', function () { return function (scope, element, attrs) { attrs.$observe('focus', function (newValue) { newValue === 'true' && element[0].focus(); }); } });The following is the HTML:{{cue.isNewest}}