How to implement watch snooping
This article mainly explains "how to achieve watch snooping". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn "how to achieve watch snooping"!
The parent passes on the child; the parent component passes through: purchaserIdProps= "SDEditlForm.sellerId", and the child component is accepted by props.
Watch snooping (for echo)
@ focus= "clickWarehouseId"; input input box, mainly through the foucs event trigger interface
If (this.warehouseId) return; determines that if there is a value, it will not trigger, preventing multiple interface drops and reducing performance consumption.
Disabled: Boolean;:disabled= "disabled"
Import'/ http/axios'
Import $http from'/ http/http'
Import Api from'/ config/api'
Export default {
Props: {
Value: {
Type: [String, Number]
Default:''
}
PurchaserIdProps: {
Type: [String, Number]
Default:''
}
Disabled: Boolean
}
Data () {
Return {
WarehouseId:''
WarehouseList: []
GetWarehouseData: {}
}
}
Watch: {
Value (newVal) {
If (! NewVal) {
This.warehouseId =''
This.$emit ('input',')
This.$emit ('select',')
} else if (newVal & & this.purchaserIdProps) {
If (this.warehouseId) return
/ / Warehouse echo by subject
This.warehouseId = this.value
This.getWarehouseData.companyId = this.purchaserIdProps
This.getWarehouseList ()
} else {
If (this.warehouseId) return
/ / Warehouse echo
This.warehouseId = this.value
This.getWarehouseList ()
}
}
}
Methods: {
GetWarehouseList () {
$http
.get ({
Url: Api.getWarehouseList
Data: this.getWarehouseData
})
.then (res = > {
This.warehouseList = res.data.data
})
}
ChangeWarehouseId () {
This.$emit ('input', this.warehouseId)
This.$emit ('select', this.warehouseId)
}
ClickWarehouseId () {
If (this.warehouseId) return
This.getWarehouseList ()
}
}
/ / Lifecycle-created (access the current this instance)
Created () {}
}
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