current position:Home>Vue provide / inject grandson component value transfer
Vue provide / inject grandson component value transfer
2021-08-27 07:57:32 【Mr Tao】
The ancestor component provides data
provide(){
user:"json"
}
// If you need to access the instance of the build , It needs to be converted to the way to return the object
provide(){
return{
todolength:this.todo.length
}
}
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Sub component injection data
inject:["user","todolength"]
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Be careful
provide/inject
binding Not at all Responsive . We can pass on a ref
property or reactive
The object is to provide
To change that behavior . In our case , If we want to respond to changes in the ancestor component , We need to provide Of todoLength
Assign a combined API computed
property:
app.component('todo-list', {
// ...
computed(){
todoLength:function(){
return this.todo.length
}
}
provide() {
return {
todoLength: this.todoLength
}
}
})
app.component('todo-list-statistics', {
inject: ['todoLength'],
created() {
console.log(`Injected property: ${this.todoLength.value}`) // > Injected property: 5
}
})
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copyright notice
author[Mr Tao],Please bring the original link to reprint, thank you.
https://en.qdmana.com/2021/08/20210827075730292w.html
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