vuex报错: [vuex] Expects string as the type, but found undefined.

报错如图

检查了好久，发现

import * as types from '../mutation-types'const actions = {add({commit}){commit(types.ADD)}
}
const mutations = {[types.ADD](state){state.count++}
}

这里的 [types.ADD] 如果换成

const actions = {add({commit}){commit('ad')}
}
const mutations = {ad(state){state.count++}
}

就不会报错

判断结果：[types.ADD]这里有问题，

于是检查mutation-types.js文件

原来是ADD等号右边没有加引号的缘故。导致[types.ADD]的出错

转载于:https://www.cnblogs.com/wang715100018066/p/9805975.html

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