The encodedBodySize property represents the size (in octets) received from the fetch (HTTP or cache), of the payload body, before removing any applied content-codings.
The initiatorType property is a string that represents the type of resource that initiated the performance event. The value of this string is as follows:
The nextHopProtocol property is a string representing the network protocol used to fetch the resource, as identified by the ALPN Protocol ID (RFC7301).
The requestStart property returns a timestamp of the time immediately before the browser starts requesting the resource from the server, cache, or local resource. If the transport connection fails and the browser retires the request, the value returned will be the start of the retry request.
The responseEnd property returns a timestamp immediately after the browser receives the last byte of the resource or immediately before the transport connection is closed, whichever comes first.
The responseStart property returns a timestamp immediately after the browser receives the first byte of the response from the server, cache, or local resource.
The secureConnectionStart property returns a timestamp immediately before the browser starts the handshake process to secure the current connection. If a secure connection is not used, the property returns zero.
The transferSize property represents the size (in octets) of the fetched resource. The size includes the response header fields plus the response payload body (as defined by RFC7230.
If the current context is a worker, the workerStart property returns a timestamp immediately before the worker that fetches the resource is started. If the context is not a worker (i.e. a browser context), this property returns zero.
Elements in HTML have attributes; these are additional values that configure the elements or adjust their behavior in various ways to meet the criteria the users want.
This page lists all the HTMLelements. They are grouped by function to help you find what you have in mind easily. Although this guide is written for those who are newer to coding, we intend it to be useful for anyone.
The HTML<shadow> element is used as a shadow DOM insertion point. You might use it if you have created multiple shadow roots under a shadow host. It is not useful in ordinary HTML. It is used with Web Components.
Global attributes may be specified on all HTML elements, even those not specified in the standard. That means that any non-standard elements must still permit these attributes, even though using those elements means that the document is no longer HTML5-compliant. For example, HTML5-compliant browsers hide content marked as <foo hidden>...<foo>, even though <foo> is not a valid HTML element.