data define a filter Filter parameter attribute, filter multiple m attributes
filter: {
a:null,
b:null,
c:null,
c:null,
} watch listen for property changes to read data
"filter" :{
handler:"getProduct",
deep:true
} has a button to modify filter n attributes,
function(){
this.filter.a=xx
this.filter.b=xx
...
...
} at this time watch will trigger multiple times. What if it is triggered only once?
even if you modify n attributes at the same time, watch is triggered once:
<template>
<div class="hello">
<h1 @click="change">click</h1>
</div>
</template>
<script>
export default {
data () {
return {
filter: {
a: null,
b: null,
c: null
}
}
},
watch: {
filter: {
handler: 'getProduct',
deep: true
}
},
methods: {
change () {
this.filter.a = Math.random()
this.filter.b = Math.random()
},
getProduct () {
console.log(this.filter)
}
}
}
</script> 
output is shown in the figure above, a and b have changed, and only log once.
if you don't need watch to manage
personal suggestions (just suggestions), write a method to call
or
this.filter = {
a: xx,
b: xx
}I don't know if it's possible
have you tried assigning values together
let t = JSON.parse(JSON.stringify(this.filter))
t.a=xx
t.b=xx
this.filter = t
each time you assign a value, change the original data address, and then monitor the current data (deep:true does not need it) to
this.filter = {
a: xx,
b: xx}
this is OK. Absolutely no problem.
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