我是Vue.js的新手,我的第一个尝试是使用ChartJS(vue-chartjs包)创建一个简单的折线图。
我已经使用了" HelloWorld.vue"作为基础材料,并创建了一个LineChart.js
问题是在HelloWorld中,我得到了一个名为datacollection
的变量,这个名称被传递给我的LineChart.js。我如何修复,所以我不将变量名称作为对象
我明白了:
datacollection:
{
labels: {...},
datasets: {...}
}
我想:
{
labels: {...},
datasets: {...}
}
因此,在我的LineChart.js中,我需要做.datacollection。这将使我的LineChart.js不再可重用,因为我总是要记住命名所有变量,并调用LineChart' datacollection'。
LineChart.js:
import { Line } from 'vue-chartjs'
export default {
extends: Line,
props: ['data', 'options'],
watch: {
'data': function (value) {
// I get the update from backend, but I have to use .datacollection (the variable name from the calling page)
console.log('Ändrat: ', value)
this.renderChart(value.datacollection, this.options)
}
},
data () {
return {
gradient: null,
gradient2: null
}
},
mounted () {
console.log('data in component', this.data)
/*
this.data contains datacollection: {
labels: {
...
},
datasets: {
....
}
}
This wont render any graph since I dont do .datacollection
*/
this.renderChart(this.data, this.options)
}
}
My Graph.vue页面:
<template>
<div class='hello'>
<h1>{{ msg }}</h1>
<h2>Graph</h2>
<!-- this.datacollection is printed as expected, {labels: {}, datasets: {}} -->
<p>{{ this.datacollection }}</p>
<section>
<line-chart
:data='{datacollection}'
:options='{chartOptions}'
:width="400"
:height="200"
>
</line-chart>
</section>
<section>
<reactive-example></reactive-example>
</section>
</div>
</template>
<script>
export default {
name: 'Graph',
mounted: function () {
this.axios.get('graph/').then(response => {
console.log(response.data)
this.datacollection = response.data
})
},
data: function () {
return {
msg: 'Welcome to Your Vue.js App',
datacollection: {
labels: ['January', 'February'],
datasets: [
{
label: 'First',
backgroundColor: '#f87979',
data: [40, 20]
},
{
label: 'Second',
backgroundColor: '#aa7979',
data: [20, 30]
}
]
}
}
}
}
</script>
<!-- Add 'scoped' attribute to limit CSS to this component only -->
<style scoped>
h1, h2 {
font-weight: normal;
}
ul {
list-style-type: none;
padding: 0;
}
li {
display: inline-block;
margin: 0 10px;
}
a {
color: #42b983;
}
</style>
我的依赖关系(版本)
"dependencies": {
"axios": "^0.17.1",
"chart.js": "^2.7.1",
"vue": "^2.5.2",
"vue-axios": "^2.0.2",
"vue-chartjs": "^3.0.2",
"vue-router": "^3.0.1"
}
我想念什么?
答案 0 :(得分:1)
在您的模板中,您有以下内容:
<line-chart
:data='{datacollection}'
:options='{chartOptions}'
:width="400"
:height="200"
>
</line-chart>
在ES2015中,{datacollection}
是速记(请参阅New notations in ECMAScript 2015),用于创建一个datacollection
属性的新对象,其值为datacollection
。在Vue中,绑定引号中的所有内容都被视为javascript表达式,因此在大多数现代浏览器中,该语法所做的是创建一个具有datacollection
属性的新对象,并将该对象传递给组件。
相反,只需删除大括号。
<line-chart
:data='datacollection'
:options='chartOptions'
:width="400"
:height="200"
>
</line-chart>