Drag'n'Drop with mouse events
UI Events: Drag'n'Drop with mouse events
When a drag occurs, which event fires when the mouse moves over an element?
Interview Response: The dragover event is triggered as the mouse moves over an element when a drag occurs. The operation during an event is frequently the same as the dragenter event. The dragenter event occurs when a draggable element enters a drop target. A dragleave event occurs when the valid drop target is left. Dragstart gets dispatched whenever a user begins to drag an element.
How do you make content inside the browser draggable?
Interview Response: HTML5 includes a drag-and-drop feature. Setting the draggable property of an element to true makes it draggable.
<button draggable="true">Draggable Button</button>
What occurs when a drag action on an element begins?
Interview Response: There are three factors to remember when a drag event begins: the main points.
- Drag Data: The data type gets sent while dragging occurs.
- Drag Feedback: This image shows alongside the mouse pointer during a drag action.
- Drag Effect: This describes the drag that occurs on an element. There are three categories, which are listed below.
- Copy: The data dragged gets copied from its current position to the drop destination if this effect is enabled.
- Move: This effect indicates that the dragged data is relocating from its original location to the drop destination.
- Link: This effect suggests that a link or relationship between the source and drop sites gets established.
Interview Response: Seven possible drag and drop events can be programmatically associated with a callback method. They include drag, dragstart, dragenter, dragover, dragleave, drop, and dragend.
- drag: The drag event triggers every hundred milliseconds as a user drags an object or text selection.
- dragstart: When a drag starts, it fires on an element.
- dragenter: this event is triggered when the mouse enters an element while dragging.
- dragover: When a drag occurs, this event is triggered when the mouse moves over an element.
- dragleave: This event is triggered when the mouse departs an element while it gets dragged.
- drop: After the drag operation, the drop event fires on the element where the drop occurred.
- dragend: When the drag operation finishes, whether it was successful, the drag source receives the dragend event.
What exactly is the dataTransfer property?
Interview Response: The dataTransfer object contains the data transmitted in a drag action. The dragstart event sets dataTransfer, which is read/handled in the drop event.