javascript - How to crate custom drag and drop web components for a web app -

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i trying r&d work around web app.

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in preceding image have described requirement.let have custom web components components 1,components 2 etc in left side.users should able drag , drop components play area , should generate predefined xml or text snippet belong component , generated value should store in variable later use.currently using angular , js , html languages achieve requirement.i know can use html5 drag , drop feature items.but don't have idea how can generate code snippet or text belong dragged items.so maybe guys have kind of experience that.i thought share requirement. appriciate ideas.


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