vue watch
var vm = new Vue({
el: '#demo',
data: {
firstName: 'Foo',
lastName: 'Bar',
fullName: 'Foo Bar'
},
watch: {
firstName: function (val) {
this.fullName = val + ' ' + this.lastName
},
lastName: function (val) {
this.fullName = this.firstName + ' ' + val
}
}
})vue js computed
computed: {
returnSomething: function () {
return this.something
}
}computed vue
// ...
computed: {
fullName: {
// getter
get: function () {
return this.firstName + ' ' + this.lastName
},
// setter
set: function (newValue) {
var names = newValue.split(' ')
this.firstName = names[0]
this.lastName = names[names.length - 1]
}
}
}
// ...vue computed
export default {
computed:{
test(){
return this.course.image
}
}
,
props:['course'],
}vue computed
var vm = new Vue({
el: '#example',
data: {
message: 'Hello'
},
computed: {
// a computed getter
reversedMessage: function () {
// `this` points to the vm instance
return this.message.split('').reverse().join('')
}
}
})vue add watcher
vm.$watch('person.name.firstName', function(newValue, oldValue) {
alert('First name changed from ' + oldValue + ' to ' + newValue + '!');
});Copyright © 2021 Codeinu
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