[英]How to pass a prop from parent to child in Vuejs
我有一個名為Stepper的父組件,它包含名為ShortSummary的子組件。 我試圖通過點擊radiobutton將步進器中的道具傳遞給ShortSummary 。 但它不起作用! 這就是我所做的。 這是步進器 :
<v-radio-group row v-model="voltage" >
<v-radio
v-for="n in radioNames"
:key="n"
:label="n"
:value="n"></v-radio>
</v-radio-group>
<app-short-summary :voltage="voltage" ></app-short-summary>
<script>
import ShortSummary from "./ShortSummary";
data() {
return {
voltage:'',
radioNames:
['24V to 36V',
'48V to 72V',
'96V to 110V']
},
components:{
appShortSummary: ShortSummry
}
}
</script>
這是ShortSummary :
<v-list-tile
:key="item.title"
avatar
ripple
@click="toggle(index)">
<v-list-tile-content>
{{item.action}}
</v-list-tile-content>
</v-list-tile>
<script>
export default {
props:['voltage']
data () {
return {
selected: [2],
items: [
{
action: `Voltage: ${this.voltage}`
},
{
action: 'Weight: POOF'
},
{
action: 'Size: BOOM'
},
{
action: '2oo2? Need the logic document'
},
{
action: 'Price: Very very expensive'
}
]
}
},
}
</script>
目前它顯示電壓為空白。 我想要Voltage: ${this.voltage}
來顯示從步進器上的Voltage: ${this.voltage}
按鈕中選擇的電壓值
組件的data
對象初始化之前this
是可用的,因此this.voltage
是不確定的。
而是將您的items
作為計算道具。
<script>
export default {
props:['voltage']
data () {
return {
selected: [2],
}
},
computed: {
items() {
return [
{
action: `Voltage: ${this.voltage}`
},
{
action: 'Weight: POOF'
},
{
action: 'Size: BOOM'
},
{
action: '2oo2? Need the logic document'
},
{
action: 'Price: Very very expensive'
}
]
}
}
</script>
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