clipboard after copy: "hello"
editor text after copy: "hello world"
clipboard after cut: " world"
editor text after cut: "hello"
clipboard after canceled copy: "custom payload"
formats after canceled copy: ["text/plain","text/html"]
copy(cancelable=true composed=true data="")
cut(cancelable=true composed=true data="")
copy(cancelable=true composed=true data="")
