actions: {

increment (context) {

context.commit('increment')，

}，

ddd(context) {

context.commit('ddd')，

}

}

用参数解构之后：

actions: {

increment ({ commit }) {

commit('increment')

}，

ddd({ commit }) {

commit('ddd')

}

}

actions: { increment ( object ) { object.commit('increment') } }

The

Action function accepts a context object with the same methods and properties as the store instance, so you can call context.commit
to submit a mutation, or get state and
getters via context.state and context.getters. When we introduce Modules later, you will know why the context object is not the store instance itself.

vuex documentation