首先,我想在其他组件上重用我的验证器,因此我将其写在 myValidator.js 上。 我将Vue对象设置为window。因为我需要在 myValidator.js 上使用i18n。我得到了这个未定义的消息。但是我的其他组件却可以正常工作。我需要你的帮助。谢谢。
Uncaught TypeError: Cannot read property '$t' of undefined
at Object../src/myValidator.js (VM406 app.js:156668)
at __webpack_require__ (VM406 app.js:724)
at fn (VM406 app.js:101)
at Object../node_modules/cache-loader/dist/cjs.js?!./node_modules/@vue/cli-plugin-babel/node_modules/babel-loader/lib/index.js!./node_modules/cache-loader/dist/cjs.js?!./node_modules/vue-loader/lib/index.js?!./src/components/HeaderSearch/index.vue?vue&type=script&lang=js& (VM406 app.js:4187)
at __webpack_require__ (VM406 app.js:724)
at fn (VM406 app.js:101)
at Module../src/components/HeaderSearch/index.vue?vue&type=script&lang=js& (VM406 app.js:157451)
at __webpack_require__ (VM406 app.js:724)
at fn (VM406 app.js:101)
at Module../src/components/HeaderSearch/index.vue (VM406 app.js:157394)
main.js
var vm = new Vue({
el: '#app',
data() {
return {
bus: eventBus
}
},
router,
store,
i18n,
render: h => h(App)
})
window.vm = vm
myValidator.js
export const accountValidatorRule = [{
required: true,
message: window.vm.$t('valid.accountBlank'), <-- this $t is undefined
trigger: 'change'
}, {
min: 6,
max: 16,
message: window.vm.$t('valid.accountRule')
}]
侧边栏/Index.vue
<template>
<div>
<search ...> <-- this line
</div>
</template>
<script>
import Search from '@/components/HeaderSearch'
...
export default {
name: 'Index',
components: { Logo, Search, Menu },
...
</script>
HeaderSearch / Index.vue
<script>
import * as myValidator from '@/myValidator' <-- this line
export default {
name: 'Index',
data() {
return {
rules: {
search: myValidator.accountValidatorRule <-- this line
},
...
}
答案 0 :(得分:0)
原因是因为在安装应用后 window.vm
仅设置为vm
。
因此, HeaderSearch / Index.vue 中 data()的声明是在安装该应用之前完成的。
为此,最优雅的解决方案是您在评论中找到的解决方案,我真的支持这样做:https://github.com/kazupon/vue-i18n/issues/149#issuecomment-357455921
但是,如果您想确保并使用vue生命周期,则可以尝试保留旧代码,而可以在 HeaderSearch / index.vue
中执行此操作<script>
import * as myValidator from '@/myValidator' <-- this line
export default {
name: 'Index',
data() {
return {
rules: {
search: null <-- assign to nothing first
},
mounted() {
// update it after mounted:
this.rules.search = myValidator.accountValidatorRule <--- the window.vm should be ready now
}
...
}