问题
Here is the parent component:
<template lang="pug">
.wrapper
el-button(type="primary", @click="dialogAddUser = true") New User
hr
// Dialog: Add User
add-edit-user(:dialog-visible.sync="dialogAddUser")
</template>
<script>
import * as data from '@/components/partials/data'
import AddUser from './partials/AddUser'
export default {
name: 'users',
components: { AddUser },
data () {
return {
users: data.users,
dialogAddUser: false
}
}
}
</script>
Here is the child component:
<template lang="pug">
el-dialog(width="75%", title="New User", :visible.sync="dialogVisible", top="5vh")
div 'el-dialog-body' - content goes here
</template>
<script>
export default {
name: 'add-user',
props: {
dialogVisible: Boolean
}
}
</script>
I am able to open the dialog
but when close the dialog using top right button inside the dialog
then I am getting this error:
Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "dialogVisible"
Later I tried to play and did something like below, but now I cannot even open the dialog
:
<template lang="pug">
el-dialog(width="75%", title="New User", :visible.sync="visibleSync", top="5vh")
div 'el-dialog-body' - content goes here
</template>
<script>
export default {
name: 'add-user',
props: {
dialogVisible: Boolean
},
watch: {
visibleSync (val) {
this.$emit('update:dialogVisible', val)
}
},
data () {
return {
visibleSync: this.dialogVisible
}
}
}
</script>
回答1:
If visible.sync
works, the component is emitting an update:visible
event.
So, to not mutate in the child and, instead, propagate the event to the parent, instead of:
:visible.sync="dialogVisible"
Do
:visible="dialogVisible", v-on:update:visible="visibleSync = $event"
Full code:
<template lang="pug">
el-dialog(width="75%", title="New User", :visible="dialogVisible", v-on:update:visible="visibleSync = $event", top="5vh")
div 'el-dialog-body' - content goes here
</template>
<script>
export default {
name: 'add-user',
props: {
dialogVisible: Boolean
},
watch: {
visibleSync (val) {
this.$emit('update:dialogVisible', val)
}
},
data () {
return {
visibleSync: this.dialogVisible
}
}
}
</script>
As another alternative, you could emit directly from the v-on
listener and do without the visibleSync
local property:
<template lang="pug">
el-dialog(width="75%", title="New User", :visible="dialogVisible", v-on:update:visible="$emit('update:dialogVisible', $event)", top="5vh")
div 'el-dialog-body' - content goes here
</template>
<script>
export default {
name: 'add-user',
props: {
dialogVisible: Boolean
}
}
</script>
来源:https://stackoverflow.com/questions/49498786/cannot-make-vue-js-element-uis-dialog-work-while-its-inside-a-child-component