Resize a chart with vue - vue.js

I want to know how can I give a size to a chart.
I using vue-chartjs and I don't see any option to do this.
I just have this code in chart componenent
<script>
import { Line, mixins } from 'vue-chartjs'
const { reactiveProp } = mixins;
export default {
name: 'line_chart',
extends: Line,
mixins: [reactiveProp],
props: ['options'],
mounted () {
this.renderChart(this.chartData, this.options);
}
}
</script>
and this code in the render component script
fillData () {
this.data_collection = {
labels: [0, 25, 50, 100],
datasets: [
{
label: 'Blue',
backgroundColor: '#147aff',
fill: false ,
borderColor: '#147aff',
data: [0, 50, 100, 0],
},
]
};
this.chart_options = {
responsive: true,
}
},

in the following way:
<elemento :styles="myStyles"></elemento>
<script>
export default: {
computed: {
myStyles () {
return {height: '99px'}
}
}
}
</script>
Example:
https://jsfiddle.net/hamiltongabriel/7s40paog/6/

Related

Unable to display chart using API call in chartjs in the context of Vuejs

Im trying to display chart using chartjs by calling API, but unable to do so.
Here s my LineChart.vue:
<script>
import {Line, mixins} from 'vue-chartjs' // We specify what type of chart we want from vue-chartjs and the mixins module
const { reactiveProp } = mixins
export default { //We are extending the base chart class as mentioned above
extends: Line,
mixins: [reactiveProp],
data () {
return {
options: { //chart options
lineTension: 0,
maintainAspectRatio: false,
legend: {
display: false
},
scales: {
yAxes: [
{
scaleLabel: {
display: false
},
ticks: {
beginAtZero: true,
// eslint-disable-next-line no-unused-vars
callback (value, index, values) {
return `${value }%`
}
}
}
],
xAxes: [
{
type: 'time',
time: {
unit: 'month'
},
scaleLabel: {
display: true,
labelString: ''
}
}
]
}
}
}
},
mounted () {
// this.chartData is created in the mixin
this.renderChart(this.chartData, this.options)
}
}
</script>
And here is my Home.vue where i have imported the LineChart:
<template>
<div class="chart">
<line-chart :chart-data="datacollection"></line-chart>
</div>
</template>
<script>
import LineChart from './LineChart'
import axios from 'axios'
import DateTime from 'luxon'
export default {
data () {
return {
date: {},
challenge: {},
datacollection: {}
}
},
component: {LineChart},
created() {
this.fillData()
},
mounted () {
this.fillData()
},
methods: {
fillData () {
axios.get('https://my_api_goes_here')
.then(response => {
const results = response.data
const dateresult = results.map(a => a.date)
const challengeresult = results.map(a => a.challenge)
this.date = dateresult
this.challenge = challengeresult
this.datacollection = {
labels: [this.date].map(labels => DateTime.fromMillis(labels * 1000).toFormat('MMM yyyy')),
datasets: [
{
data: [this.challenge],
label: 'Africa',
borderColor: '#7367F0'
}
]
}
})
.catch(error => {
console.log(error)
})
}
}
}
</script>
Dont know why the chart did not appear even though my other resources have been loaded from the API call, when i checked out my console, this is what error im getting:
TypeError: results.map is not a function
Please check out my logic and let me where the error is.

How to correctly pass array with data to a chart from the VueApexCharts library in vue3?

I am writing a small covid project and trying to plot confirmed infection data using ApexCharts, but the graph is not showing. I enter the data from vuex in two tables. The data is valid however it comes from api and sa in the proxy object. What am I doing wrong? (I am using ApexCharts because vue Chartjs is not compatible with vue 3).
<template>
<apexchart width="500" type="bar" :options="options" :series="series"></apexchart>
</template>
<script>
import VueApexCharts from "vue3-apexcharts";
export default {
components: {
apexchart: VueApexCharts,
},
data(){
return {
series: [],
options: {
chart: {
type: "bar",
height: 400,
stacked: true
},
plotOptions: {
bar: {
horizontal: false
}
},
dataLabels: {
enabled: false
},
tooltip: {
shared: true,
followCursor: true
},
stroke: {
width: 1,
colors: ["#fff"]
},
fill: {
opacity: 1
},
legend: {
position: "top",
horizontalAlign: "center",
offsetX: 40
},
colors: ["rgb(95, 193, 215)", "rgb(226, 37, 43)", "rgb(94, 181, 89)"]
}
};
},
computed: {
getDate(){
return this.$store.getters['chart/getDate'];
},
getConfirmed(){
return this.$store.getters['chart/getConfirmed'];
}
},
methods: {
fillDate(){
this.options = {
xaxis: {
categories: this.getDate
}
}
this.series = [
{
name: 'Confirmed',
data: this.getConfirmed
}
];
}
},
async mounted() {
await this.fillDate();
}
}
The data from the vuex store are two arrays.
Proxy
[[Handler]]: Object
[[Target]]: Array(45)
[[IsRevoked]]: false
Instead of using mounted hook and method try to watch the computed properties then update the data based on that ones:
computed: {
getDate(){
return this.$store.getters['chart/getDate'];
},
getConfirmed(){
return this.$store.getters['chart/getConfirmed'];
}
},
watch:{
getDate:{
handler(newVal){
this.options = {
xaxis: {
categories: this.getDate
}
},
deep:true
},
getConfirmed:{
handler(newVal){
this.series = [
{
name: 'Confirmed',
data: this.getConfirmed
}
];
},
deep:true
}
}

vue-chartJs, Unable to update the chart

I am using Vue-Chartjs to create a simple Line chart, I'm filling the chart with data via a get request to an API
however I want to generate new values randomly when I click on a button, & pass the values as a prop to chart-line component.
I've tried using reactiveProp & I also tried using a watcher for chartData prop, but I'm always getting this error
client.js?06a0:83 TypeError: Cannot read property 'map' of undefined
Dashboard Component
<template>
<div class="container">
<h1>Dashboard Page</h1>
<v-alert v-if="errorDetected"
class="mt-4"
dense
outlined
type="error"
>
There was an error while getting the chart data
</v-alert>
<v-btn #click="generateNewData()">Generate new data</v-btn>
<div class="loader-container">
<img v-if="!loaded" class="chart-loader mt-3" src="../static/loader-dotted.gif" alt="">
</div>
<ChartLine v-if="loaded" :chartData="values" :bind="true" />
</div>
</template>
<script>
import ChartLine from '../components/chart-line'
export default {
middleware: 'session',
components: {
ChartLine
},
data() {
return {
values: [],
customValues: [],
loaded: false,
errorDetected: false
}
},
head() {
return {
title: 'Dashboard page',
meta: [
{
hid: 'description',
name: 'description',
content: 'simple dashboard SPA'
}
]
}
},
mounted() {
this.requestData()
},
methods: {
requestData() {
this.loaded = false
this.$axios.get('http://www.mocky.io/v2/5eda474f330000fefc79eab4?mocky-delay=2000ms').then(response => {
console.log("requestData -> response", response)
this.values = response.data.data.value
this.loaded = true
}).catch(error => {
this.loaded = true
this.errorDetected = true
})
},
generateNewData() {
this.values = [];
for(let i=0; i<7; i++)
this.values.push(Math.floor((Math.random() * 10) + 1))
}
}
}
</script>
<style>
.loader-container {
display: flex;
justify-content: center;
}
.chart-loader {
width: 150px;
}
</style>
ChartLine Component
<script>
//Importing Line class from the vue-chartjs wrapper
import { Line, mixins } from 'vue-chartjs'
const { reactiveProp } = mixins
//Exporting this so it can be used in other components
export default {
extends: Line,
mixins: [reactiveProp],
props: ['chartData'],
data () {
return {
datacollection: {
//Data to be represented on x-axis
labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
datasets: [
{
label: "Data 1",
backgroundColor: "transparent",
borderColor: "rgba(1, 116, 188, 0.50)",
pointBackgroundColor: "rgba(171, 71, 188, 1)",
//Data to be represented on y-axis
data: this.chartData
}
],
},
options: {
responsive: true,
maintainAspectRatio: false
}
//Chart.js options that controls the appearance of the chart
}
},
watch: {
chartData() {
this.renderChart(this.datacollection, this.options)
}
},
mounted () {
//renderChart function renders the chart with the datacollection and options object.
this.renderChart(this.datacollection, this.options)
}
}
</script>
UPDATE
I've managed to solve the issue of updating the chart
I removed the dataCollection from the chart-line component & added it in the dashboard component, I've also used the requestData() method in the created() hook to make a get request to the API, then on a button click I generate a new values and pass it as a prop
Update Code
Dashboard Component
<template>
<div class="container">
<h1>Dashboard Page</h1>
<v-alert v-if="errorDetected"
class="mt-4"
dense
outlined
type="error"
>
There was an error while getting the chart data
</v-alert>
<v-btn class="primary" #click="generateNewData()">Generate New Data</v-btn>
<div class="loader-container">
<img v-if="!loaded" class="chart-loader mt-3" src="../static/loader-dotted.gif" alt="">
</div>
<ChartLine v-if="loaded" :chart-data="dataCollection" />
</div>
</template>
<script>
import ChartLine from '../components/chart-line'
export default {
middleware: 'session',
components: {
ChartLine
},
data() {
return {
dataCollection: null,
values: [],
customValues: [],
loaded: false,
errorDetected: false
}
},
head() {
return {
title: 'Dashboard page',
meta: [
{
hid: 'description',
name: 'description',
content: 'simple dashboard SPA'
}
]
}
},
created() {
// this.loaded = false
// this.fillData()
// this.loaded = true
this.requestData()
},
methods: {
requestData() {
this.loaded = false
this.$axios.get('http://www.mocky.io/v2/5eda474f330000fefc79eab4?mocky-delay=2000ms').then(response => {
this.values = response.data.data.value
this.loaded = true
this.fillData()
}).catch(error => {
this.loaded = true
this.errorDetected = true
})
},
fillData () {
this.dataCollection = {
labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
datasets: [
{
label: "Data 1",
backgroundColor: "transparent",
borderColor: "rgba(1, 116, 188, 0.50)",
pointBackgroundColor: "rgba(171, 71, 188, 1)",
data: this.values
}
]
}
},
generateNewData() {
this.values = []
this.loaded = false
setTimeout(function(){},2000)
for(let i=0; i<7; i++) {
this.values.push(Math.floor(Math.random() * (50 - 5 + 1)) + 5)
}
this.fillData()
this.loaded = true
}
}
}
</script>
<style>
.loader-container {
display: flex;
justify-content: center;
}
.chart-loader {
width: 150px;
}
</style>
Chart-Line Component
<script>
//Importing Line class from the vue-chartjs wrapper
import { Line, mixins } from 'vue-chartjs'
//Exporting this so it can be used in other components
export default {
extends: Line,
mixins: [mixins.reactiveProp],
// props:['chartData'],
data () {
return {
options: {
responsive: true,
maintainAspectRatio: false
}
//Chart.js options that controls the appearance of the chart
}
},
mounted () {
//renderChart function renders the chart with the datacollection and options object.
this.renderChart(this.chartData, this.options)
}
}
</script>
however there's still one thing I can't figure out, which is the loading state, when clicking on the button to generate new data
when I first open the dashboard page, the loading state works, but when I click on the button, loading state doesn't work
any Idea why??????

Unable to Construct Stacked Vue-ChartJS Line Plot

I'm trying to make a stacked line chart using Vue-ChartJS but am having difficulties getting it to stack.
I tried adding the following into the fill data function but saw no change.
scales: {
yAxes: [{ stacked: true}]
}
I also tried creating a this.options entry but that didn't work either. The minimal reproducible code for the chart is as follows, any advice or help would be much appreciated!
## LineChart.js
import { Line, mixins } from 'vue-chartjs'
const { reactiveProp } = mixins
export default {
extends: Line,
mixins: [reactiveProp],
props: ['options'],
mounted() {
this.renderChart(this.chartData, this.options)
}
}
## LineChart.vue
<template>
<div class="small">
<line-chart :chart-data="chartData"></line-chart>
<button #click="fillData()">Randomize</button>
</div>
</template>
<script>
import LineChart from '../store/LineChart.js'
export default {
components: {
LineChart
},
data() {
return {
chartData: null
}
},
mounted() {
this.fillData()
},
methods: {
fillData() {
this.chartData = {
labels: [this.getRandomInt(), this.getRandomInt()],
datasets: [
{
label: 'Data One',
backgroundColor: '#f87979',
data: [this.getRandomInt(), this.getRandomInt()]
},
{
label: 'Data Two',
backgroundColor: '#C23596',
data: [this.getRandomInt(), this.getRandomInt()]
}
]
}
},
getRandomInt() {
return Math.floor(Math.random() * (50 - 5 + 1)) + 5
}
}
}
</script>
<style>
.small {
max-width: 600px;
margin: 150px auto;
}
</style>
You need to pass scales in the options:
...
<div class="small">
<line-chart :chart-data="chartData" :options="options"></line-chart>
<button #click="fillData()">Randomize</button>
</div>
...
data() {
return {
chartData: null,
options: {
scales: {
yAxes: [
{
stacked: true
}
]
},
},
}
},

Vue-Chartjs reactive chart options passing

So I follow the author's doc and make a reactive chart just as the doc sample.
A js file & a vue file :
// the chart.js file
import { Line, mixins } from 'vue-chartjs'
const { reactiveProp } = mixins
export default {
extends: Line,
mixins: [reactiveProp],
props: ['options'],
mounted () {
this.renderChart(this.chartData, this.options)
}
}
// the chart.vue file
<template>
<div style="background:#fff;">
<line-chart :chart-data="datacollection"></line-chart>
<button #click="fillData()">Randomize</button>
</div>
</template>
<script>
import LineChart from './chart'
export default {
components: {
LineChart
},
data () {
return {
datacollection: null
}
},
mounted () {
this.styling()
this.fillData()
},
methods: {
fillData () {
this.datacollection = {
labels: [this.getRandomInt(), this.getRandomInt(), this.getRandomInt(), this.getRandomInt(), this.getRandomInt(), this.getRandomInt(), this.getRandomInt()],
gridLines: {
display: false
},
datasets: [
{
label: 'Data One',
fill: false,
borderColor: 'red',
backgroundColor: 'red',
borderWidth: 1,
data: [this.getRandomInt(), this.getRandomInt(), this.getRandomInt(), this.getRandomInt(), this.getRandomInt(), this.getRandomInt(), this.getRandomInt()]
}
]
}
},
styling () {
this.Chart.defaults.global.elements.line.backgroundColor = '#1d3'
},
getRandomInt () {
return Math.floor(Math.random() * (50 - 5 + 1)) + 5
}
}
}
</script>
The problem is :
it seems that I can't pass options whatsoever.
What I need to do is
Hide all gridlines inculding x&y
Make the tooltips always displayed
But I've tried every way possible and none of them works , even like :
import { Line, mixins } from 'vue-chartjs'
const { reactiveProp } = mixins
export default {
extends: Line,
mixins: [reactiveProp],
props: ['options'],
mounted () {
this.renderChart(this.chartData, {
scales: {
xAxes: [{
gridLines: {
color: "rgba(0, 0, 0, 0)",
display: false
}
}],
yAxes: [{
gridLines: {
color: "rgba(0, 0, 0, 0)",
display: false
}
}]
}
})
}
}
It won't work , tooltips is the same
I just want to know , is it possible for reactive vuechartjs to pass options ? or I just need to use chartjs instead ?
You can check demo at https://codepen.io/ittus/pen/MGQaNY
To make tooltips always display, you can add
Chart.pluginService.register({
beforeRender: function(chart) {
if (chart.config.options.showAllTooltips) {
chart.pluginTooltips = [];
chart.config.data.datasets.forEach(function(dataset, i) {
chart.getDatasetMeta(i).data.forEach(function(sector, j) {
chart.pluginTooltips.push(new Chart.Tooltip({
_chart: chart.chart,
_chartInstance: chart,
_data: chart.data,
_options: chart.options.tooltips,
_active: [sector]
}, chart));
});
}); // turn off normal tooltips
chart.options.tooltips.enabled = false;
}
},
afterDraw: function(chart, easing) {
if (chart.config.options.showAllTooltips) { // we don't want the permanent tooltips to animate, so don't do anything till the animation runs atleast once
if (!chart.allTooltipsOnce) {
if (easing !== 1) return;
chart.allTooltipsOnce = true;
}
chart.options.tooltips.enabled = true;
Chart.helpers.each(chart.pluginTooltips, function(tooltip) {
tooltip.initialize();
tooltip.update(); // we don't actually need this since we are not animating tooltips
tooltip.pivot();
tooltip.transition(easing).draw();
});
chart.options.tooltips.enabled = false;
}
}
});
then pass showAllTooltips: true into options