If you want to prevent some events from initiating a drag gesture, use drag.filter. The propagation of all consumed events is immediately stopped. This table describes how the drag behavior interprets native events: Event For vanilla HTML in modern browsers, import d3-drag from Skypack: You can also download the latest release on GitHub. When Pointer Events are more widely available, the drag behavior will support those, too. The drag behavior is agnostic about the DOM, so you can use it with SVG, HTML or even Canvas! And you can extend it with advanced selection techniques, such as a Voronoi overlay or a closest-target search:īest of all, the drag behavior automatically unifies mouse and touch input, and avoids browser idiosyncrasies. The drag behavior can be combined with other behaviors, such as d3-zoom for zooming. For example, you can use it to lasso elements in a scatterplot, or to paint lines on a canvas: But the drag behavior isn’t just for moving elements around there are a variety of ways to respond to a drag gesture. You can also use d3-drag to implement custom user interface elements, such as a slider. For example, you can use d3-drag to facilitate interaction with a force-directed graph, or a simulation of colliding circles: D3’s drag behavior provides a convenient but flexible abstraction for enabling drag-and-drop interaction on selections. Drag-and-drop is a popular and easy-to-learn pointing gesture: move the pointer to an object, press and hold to grab it, “drag” the object to a new location, and release to “drop”.
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