今天给大家分享下vue.js中的计算属性(computed)
示例一
computed的get属性
html:
<template> <div class="input-text"> <input type="text" v-model='firstName'> <input type="text" v-model='lastName'> {
{
fullName}
}
</div></template>
js:
<script>export default {
components: {
}
, ready: function() {
}
, methods: {
}
, data() {
return {
firstName: 'Foo', lastName: 'Bar' }
}
, computed: {
fullName: {
// getter get: function() {
return this.firstName + ' and ' + this.lastName }
, // setter set: function(newValue) {
var names = newValue.split(' and ') this.firstName = names[0] this.lastName = names[names.length - 1] }
}
}
}
</script>
示例二
computed的get和set属性:
html:
<template> <div class="input-text"> <input type="text" v-model='a'>{
{
b}
}
<input type="button" value="修改b的值" @click='updateData'> <input type="text" v-model='c'> </div></template>
js:
<script>export default {
components: {
}
, ready: function() {
}
, methods: {
updateData:function(){
this.b=this.b;
//给 b 重新赋值时就会调用 b 的 set 属性,从而改变 c 的值 }
}
, data() {
return {
a:'1:30', c:'' }
}
, computed: {
b:{
get: function() {
//通过a的值改变b的值 var time=this.a;
time = time ? time.split(':') : '';
let hours = time[0];
let minutes = time[time.length - 1];
return parseInt(hours) * 60 + parseInt(minutes);
}
, set:function(newValue){
//通过b值的改变,设置 c 的值 let newTimes = newValue;
let hoursTime = parseInt(newTimes) / 60;
let minutesTime = parseInt(newTimes) % 60;
newTimes = newTimes + '';
hoursTime = hoursTime + '';
hoursTime = hoursTime ? hoursTime.split('.') : '';
this.c = hoursTime[0] + ':' + minutesTime;
console.log(hoursTime[0] + ':' + minutesTime);
}
}
}
}
</script>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
