I'm currently investigating the atomicity of mutations in Vuex. The code snippet I'm reviewing has me questioning whether the CHANGE_A mutation could potentially be triggered while CHANGE_B is still in progress:
const mutations = {
[CHANGE_A](state, DATA) {
Vue.set(this.test, 'left', DATA);
},
[CHANGE_B](state, data) {
Vue.set(this.test, 'right', DATA);
Vue.set(this.test, 'left', DATA);
},
}
Any insights on this matter would be greatly appreciated. Thank you!
Mutations are considered atomic due to the requirement that their handler functions must always be synchronous, as explained in the documentation: https://vuex.vuejs.org/guide/mutations.html
Deviation from this best practice by making the handler function asynchronous would result in them no longer being atomic.
Genetic variations are essentially regular synchronous processes, meaning they occur atomically. It is ensured that no two genetic mutations happen simultaneously, unless there are asynchronous activities like fetching data, using setTimeout, handling promises, or triggering one mutation from another.
Upon detection of a modification in reactive data, Vue will add those changes to a queue and execute the corresponding watchers in the upcoming microtask (asynchronously).
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