Abstract: An embodiment may involve web page metadata that defines a web page, first sub-page metadata that defines a first sub-page, and second sub-page metadata that defines a second sub-page, wherein the web page metadata includes specification of a viewport, and wherein the viewport is associated with an identifier. One or more processors may be configured to: receive a request for the web page; resolve the web page metadata into web content, wherein resolving the web page metadata includes: (i) determining, based on the identifier, a route associated with the viewport, (ii) determining, based on the route, a set of conditions associated with the viewport, (iii) determining that a particular condition is satisfied, wherein the particular condition is associated with the first sub-page and (iv) placing, based on the particular condition being satisfied, the first sub-page metadata in the viewport; and transmit the web content.

Abstract: Persistent storage may contain a plurality of user interface (UI) component definitions. One or more processors may be configured to: receive, by way of a platform UI builder, selection of a UI component definition from the plurality of UI component definitions; bind, by way of input entered into the platform UI builder, data to the UI component definition, wherein the data is from a data source, and wherein the input is a programmatic statement that references the data source or a set of values that references the data source; generate, by way of the platform UI builder, metadata representing the input; create, by a platform runtime, a UI component that incorporates the data into the UI component definition in accordance with the metadata; generate, by the platform runtime, a graphical user interface including the UI component; and provide, for display on a client device, a representation of the graphical user interface.