Error in data(): "ReferenceError: process is not defined"

[Andrei-Pozolotin]

while trying to run inside https://jsfiddle.net/:

plugin assumes node.js context is present:
https://github.com/Kelin2025/vue-timers/blob/master/mixin.js#L32

vue.js:634 [Vue warn]: Error in data(): "ReferenceError: process is not defined"

(found in <Root>)
vue.js:1897 ReferenceError: process is not defined
    at normalizeConfig (mixin.js:33)
    at mixin.js:69
    at Array.reduce (<anonymous>)
    at normalizeOptions (mixin.js:66)
    at Vue.data (mixin.js:78)
    at Vue.mergedInstanceDataFn (vue.js:1240)
    at Vue.mergedInstanceDataFn (vue.js:1243)
    at getData (vue.js:4739)
    at initData (vue.js:4696)
    at initState (vue.js:4635)
vue.js:634 [Vue warn]: Error in mounted hook: "ReferenceError: process is not defined"

(found in <Root>)
vue.js:1897 ReferenceError: process is not defined
    at Object.start (mixin.js:91)
    at mixin.js:140
    at Array.forEach (<anonymous>)
    at Vue.mounted (mixin.js:138)
    at invokeWithErrorHandling (vue.js:1863)
    at callHook (vue.js:4214)
    at mountComponent (vue.js:4081)
    at Vue.$mount (vue.js:9038)
    at Vue.$mount (vue.js:11923)
    at Vue._init (vue.js:5006)

[masongzhi]

your jsfiddle example was empty