Revision control
++ QT += widgets
++
++ HEADERS = dragwidget.h
++ RESOURCES = draggabletext.qrc
++ SOURCES = dragwidget.cpp \
++ main.cpp
++ wasm {
++ QMAKE_LFLAGS += -sASYNCIFY -Os
++ }
++
++ # install
++ target.path = $$[QT_INSTALL_EXAMPLES]/widgets/draganddrop/draggabletext
++ INSTALLS += target