sale_price is not a function
错误1.1
报错信息：
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| [Vue warn]: Error in render: "TypeError: sale_price is not a function"
(found in <Root>)
warn @ vue.js:634
logError @ vue.js:1893
globalHandleError @ vue.js:1888
handleError @ vue.js:1848
Vue._render @ vue.js:3547
updateComponent @ vue.js:4061
get @ vue.js:4472
Watcher @ vue.js:4461
mountComponent @ vue.js:4068
Vue.$mount @ vue.js:9038
Vue.$mount @ vue.js:11923
Vue._init @ vue.js:5006
Vue @ vue.js:5072
(anonymous) @ vuetest6.html?_ijt=5ggpj94mjdir3hlbilh3q5krqo:15
|
错误代码：
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| <!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="js/vue.js"></script>
</head>
<body>
<div id="app">
原价格：{{ price|k(2) }}<br/>
折扣价：{{ sale_price(2) }}
</div>
</body>
<script>
let vm = new Vue({
el: '#app',
data: {
price: 20.3,
sale: 0.6,
},
filters: {
k(value, num){
return value.toFixed(num)
}
},
computed: {
sale_price(val){
let s_price = this.price * this.sale;
return s_price.toFixed(val)
}
}
})
</script>
</html>
|
错误原因：
计算属性不能传参数。因为从名字就能看出来，属性，不是方法。
解决方法：
把计算属性 sale_price 的参数去掉。
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| <!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="js/vue.js"></script>
</head>
<body>
<div id="app">
原价格：{{ price|k(2) }}<br/>
折扣价：{{ sale_price }}
</div>
</body>
<script>
let vm = new Vue({
el: '#app',
data: {
price: 20.3,
sale: 0.6,
},
filters: {
k(value, num){
return value.toFixed(num)
}
},
computed: {
sale_price(){
let s_price = this.price * this.sale;
return s_price.toFixed(2)
}
}
})
</script>
</html>
|