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This greatly improves the speed and efficiency of each operation and allows for frequent updates to the database while maintaining a seamless user experience. GraphQL allows for single round-trip queries (reads) or mutations (writes) to the database which touch only the data that has been specified.
If the information was stored in a single point, it would result in a significant amount of over-fetching. Unless complete project information were to be stored as a single data point for each project, the design of the REST api endpoints would likely require multiple round trips each time project information needed to be read from or written to the database. These many to many relationships could pose significant problems using a traditional REST API. Within Codedrop, a single project can have many users, a user can have many projects, and a project is composed of many component elements. GraphQL and Dgraph: Saving user projects with complex relationships We created a user modifiable data set for each draggable element type, utilized the Prettier API to transform the data, and implemented a factory which would instantiate a new React or Angular object based on the payload data ultimately provided by the React DnD item. In Codedrop, thanks to the architecture of React DnD, droppable elements are all plain JavaScript objects. Factory patterns, a subcategory of creational patterns, take as input a set of data and pass it via argument to a factory function, where a new class is dynamically instantiated based on the payload. Creational patterns control the process of creating objects. Patterns can be divided into structural, behavioral and creational patterns. They offer expressive, reusable solution schemes.
Codedrop fullscreenlayoutpagetransitions how to#
Patterns offer a template for how to solve a problem. To solve this problem, we turned to programming patterns. Each time a user drags and drops a visual element, Codedrop takes the information in that item object, and makes that information available to the user in the form of either a React or Angular component.
Codedrop fullscreenlayoutpagetransitions code#
One of the major features of Codedrop is code generation. Code Generation: Rendering a dropped object as code A big thank you to Anne Zhou for her work on complex nested drag and drop. React DnD also allows for tracking state changes of components via monitors and callbacks, which can be used to enhance UI/UX by giving visual feedback on state change to users. Types exist on draggable elements and drop targets where they allow for specification of compatibility. Types are strings, which uniquely identify classes of objects. This data layer logic keeps components decoupled. When a user interacts with the application, React DnD does not say that a component or DOM node is being dragged, instead, it says an item of a certain type is being dragged.
In React DnD, data is the source of truth and as such, the payload for an object being moved is a plain JavaScript object known as an item. How does it work? Drag and Drop: Moving images on the screenįor this project we chose to implement the React DnD (Drag and Drop) library, created by Dan Abramov, for it’s powerful primitives and it’s Flux architecture.
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