1、普通watch
data() {
return {
frontPoints: 0
}
},
watch: {
frontPoints(newValue, oldValue) {
console.log(newValue)
}
}
2、数组的watch
data() {
return {
winChips: new Array(11).fill(0)
}
},
watch: {
winChips: {
handler(newValue, oldValue) {
for (let i = 0; i < newValue.length; i++) {
if (oldValue[i] != newValue[i]) {
console.log(newValue)
}
}
},
deep: true
}
}
3、对象的watch
data() {
return {
bet: {
pokerState: 53,
pokerHistory: 'local'
}
}
},
watch: {
bet: {
handler(newValue, oldValue) {
console.log(newValue)
},
deep: true
}
}
4、对象的具体属性watch(活用computed)
data() {
return {
bet: {
pokerState: 53,
pokerHistory: 'local'
}
}
},
computed: {
pokerHistory() {
return this.bet.pokerHistory
}
},
watch: {
pokerHistory(newValue, oldValue) {
console.log(newValue)
}
}