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Ramazan Kornilov
Ramazan Kornilov

Change Player Display User Client Sided

Client-side storage works on similar principles, but has different uses. It consists of JavaScript APIs that allow you to store data on the client (i.e. on the user's machine) and then retrieve it when needed. This has many distinct uses, such as:

change player display user client sided


Note: There are limits to the amount of data you can store using client-side storage APIs (possibly both per individual API and cumulatively); the exact limit varies depending on the browser and possibly based on user settings. See Browser storage quotas and eviction criteria for more information.

The concept of client-side storage has been around for a long time. Since the early days of the web, sites have used cookies to store information to personalize user experience on websites. They're the earliest form of client-side storage commonly used on the web.

Note: The given path to the sw.js file is relative to the site origin, not the JavaScript file that contains the code. The service worker is at -area/javascript/apis/client-side-storage/cache-sw/video-store-offline/sw.js. The origin is , and therefore the given path has to be /learning-area/javascript/apis/client-side-storage/cache-sw/video-store-offline/sw.js. If you wanted to host this example on your own server, you'd have to change this accordingly. This is rather confusing, but it has to work this way for security reasons.

The ports 55752 (HTTP), 55754 (TCP), 55756 (mobile communication), and 55757 (mobile streaming) are used on AXIS Camera Station server for communication between the server and the client. If required, the ports can be changed from AXIS Camera Station Service Control. See General in AXIS Camera Station Service Control.

When trying to connect to a server for the first time, the client checks the server certificate ID. To ensure that you are connecting to the correct server, manually verify the certificate ID with the one displayed in AXIS Camera Station Service Control. See General.

The Configuration tab is used to manage and maintain connected devices, as well as settings for the client and servers. Click and select Configuration to display the Configuration tab in the AXIS Camera Station client.

If some settings do not exist or can't be applied, the task status will show as Error in the Tasks tab at the bottom of the AXIS Camera Station client. Right-click the task and select Show to display information about the settings that could not be applied.

The raise alarm action sends an alarm to all connected AXIS Camera Station clients. The alarm will be displayed in the Alarms tab and as a taskbar notification. Instructions in form of a file with alarm procedures can be included with the alarm.

Select to share anonymous client usage data with Axis Communications to help improve the application and user experience. To change the option for the server, go to Configuration > Server > Settings.

Select to share anonymous server usage data with Axis Communications to help improve the application and user experience. To change the option for the client, go to Configuration > Client > Settings.

If you have one Axis S22 series device, this option is available for you to configure your S22 series device from AXIS Camera Station. Go to Configuration > Switch > Management and enter your username and password to open the Switch management page in the AXIS Camera Station client. For how to configure the switch, see S22 series User Manual on

The very last piece of our media player to implement is the time-elapsed displays. To do this we'll run a function to update the time displays every time the timeupdate event is fired on the element. The frequency with which this event fires depends on your browser, CPU power, etc. (see this StackOverflow post).

In an online chess game, each player is given a time limit for completing each move. When the player is warned that time is almost up for this move, the user is provided with an option to increase the time.

The example below has a decorative image in front of an anchor element. When the user mouses over the anchor tag, the decorative image in front of the anchor is changed. When the mouse moves off of the anchor, the image is changed back to its original version. The same image change effect occurs when the user gives keyboard focus to the anchor element. When focus is received the image changes, when focus is lost the image is changed back. This is accomplished by attaching onmouseover, onmouseout, onfocus and onblur event handlers to the anchor element. The event handler is a JavaScript function called updateImage(), which changes the src attribute of the image. The updateImage() is called in response to the onmouseover, onmouseout, onfocus, and onblur events.

The objective of this technique is to display a dialog containing a message (alert) to the user. When the alert is displayed, it receives focus and the user must activate the OK button on the dialog to dismiss it. Since these alerts cause focus to change they may distract the user, especially when used for non-emergency information. Alerts for non-emergency purposes such as displaying a quote of the day, helpful usage tip, or count down to a particular event, are not presented unless the user enables them through an option provided in the Web page.

This technique assigns a global JavaScript variable to store the user preference for displaying alerts. The default value is false. A wrapper function is created to check the value of this variable before displaying an alert. All calls to display an alert are made to this wrapper function rather than calling the alert() function directly. Early in the page, a button is provided for the user to enable the display of alerts on the page. This technique works on a visit by visit basis. Each time the page is loaded, alerts will be disabled and the user must manually enable them. Alternatively, the author could use cookies to store user preferences across sessions.

The objective of this technique is to validate user input as values are entered for each field, by means of client-side scripting. If errors are found, an alert dialog describes the nature of the error in text. Once the user dismisses the alert dialog, it is helpful if the script positions the keyboard focus on the field where the error occurred.

The following sample shows multiple controls in a form. The form element uses the onsubmit attribute which creates an event handler to execute the validation script when the user attempts to submit the form. If the validation is successful, the event returns true and the form submission proceeds; if the validation finds errors, it displays an error message and returns false to cancel the submit attempt so the user can fix the problems.

It is important to note that the select item which is modified is after the trigger select element in the reading order of the Web page. This ensures that assistive technologies will pick up the change and users will encounter the new data when the modified element receives focus. This technique relies on JavaScript support in the user agent.

In this example of an image link, the image is changed when the user positions the pointer over the image. To provide keyboard users with a similar experience, the image is also changed when the user tabs to it.

This example demonstrates use of client-side scripting to validate a form. If errors are found appropriate error messages are displayed. The example uses the DOM functions to add error notification consisting of a title, a short paragraph explaining that an error has occurred, and a list of errors in an ordered list. The content of the title is written as a link so that it can be used to draw the user's attention to the error using the focus method. Each item in the list is also written as a link that places the focus onto the form field in error when the link is followed.

For simplicity, the example just validates two text fields, but can easily be extended to become a generic form handler. Client-side validation should not be the sole means of validation , and should be backed up with server-side validation. The benefit of client-side validation is that you can provide immediate feedback to the user to save them waiting for the errors to come back from the server, and it helps reduce unnecessary traffic to the server. 041b061a72


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