When discussing optimizing and controlling the user experience on websites and applications, one of the new and attractive capabilities of the web is the use of HTTP Headers to apply "feature policies" or the same Feature-Policy. This capability allows developers to have more control over various features that browsers can utilize on their sites.
One of these interesting features is the new screen-wake-lock. This feature allows the browser to keep the display awake and prevent it from sleeping or entering a standby mode. Using it is particularly beneficial when running web applications that require constant display of information, such as mapping applications or streaming video services, which are quite frequent.
To utilize this policy, you can include it in an HTML header as follows:
<meta http-equiv="Feature-Policy" content="screen-wake-lock 'self'">By using this code, you indicate to the browser that keeping the display on is permissible only in the same origin where the code is executed. This feature helps to mitigate excess power consumption and also ensures the security and privacy of users.
Line-by-Line Explanation of the Code
<meta http-equiv="Feature-Policy" This line indicates that you want to use the meta tag for applying feature policies.
content="screen-wake-lock 'self'" In this part, you specify that the screen-wake-lock capability should only be active in the same origins where the page is loaded.