How popular is Chartjs Chart with Vuejs and Axios?

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I’m not getting popular my chart with data vintos of an api, can help me, I don’t know what I’m doing wrong!

<template>
<div class="py-1 bg-light px-5">
    <div class="col-12 my-2">                    
        <div class="card shadow-none border-0">
            <div class="card-body">
                <p>Site Traffic Overview</p>
                <div id="content">
                    <canvas ref="chart"></canvas>
                </div>
            </div>
        </div>
    </div>
</div>


<script>
import Chart from 'chart.js';
import ChartJs from '../../domain/Chart';
import ChartService from '../../services/Chart';

export default {
     data () {
    return {
            dados: [],
            month: [],
            views: [],
            dado: {month: '', views: ''}
        }
    },
    mounted(dados){
    listar: () => {
        return http.get('apioculta')        
    }
        ChartService.listar()
        .then(resposta => {
            dados = resposta.data;
            console.log(dados)
        })
        .catch(error => {
            console.log(error)
        })
        var chart = this.$refs.chart;
            var ctx = chart.getContext("2d");
            var myChart = new Chart(ctx, {
                type: 'line',
                data: {
                    labels: this.dados.month,                    
                    datasets: [{
                        label: 'Traffic',
                        data: this.dados.views,
                        backgroundColor: [
                            'rgba(255, 99, 132, 0.2)',
                            'rgba(54, 162, 235, 0.2)',
                            'rgba(255, 206, 86, 0.2)',
                            'rgba(75, 192, 192, 0.2)',
                            'rgba(153, 102, 255, 0.2)',
                            'rgba(255, 159, 64, 0.2)'
                        ],
                        borderColor: [
                            'rgba(255,99,132,1)',
                            'rgba(54, 162, 235, 1)',
                            'rgba(255, 206, 86, 1)',
                            'rgba(75, 192, 192, 1)',
                            'rgba(153, 102, 255, 1)',
                            'rgba(255, 159, 64, 1)'
                        ],
                        borderWidth: 1
                    }]
                },
                options: {
                    scales: {
                        yAxes: [{
                            ticks: {
                                beginAtZero: true
                            }
                        }]
                    },
                    responsive: true,
                    maintainAspectRation: true
                }
            });
    }
}
</script>

vue.js chartjs axios

  • the console.log(data) output is printing correctly? I believe you should use this.data = answer.data

  • Yes, it is, in the console, I have all the data shown, and the graph gets to be mounted, but it does not load the Abels and datasets | date, it seems to be a matter of loading order that I am not knowing how to solve! If you can help, thank you!

1 answer

1

I advise using a Vue-chartjs flame package https://vue-chartjs.org/ and create Wrappers on top of it, if you don’t want to use it, you can create a boolean variable in date, called hasData: false and add a v-if in div of the graph, v-if="hasData". So this div will not exist until the data is populated in the service response, that is, within the then you arrow the this.hasData = true after popular the variable dice, I believe that with this you solve the problem.

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