如何修复图表JS中的模糊图表问题? [英] How to fix blurry chart issue in chart js?

问题描述

我正在使用chart.js创建条形图.但是此图表在我的屏幕上看起来很模糊.下面是我的html和js代码:

I am creating a bar chart using chart.js. but this chart look blurry in my screen. Below is my html and js code:

<canvas id="myChart" style="padding-left: 0;padding-right: 0;margin-left: auto; margin-right: auto; display: block;width: 90%;height:350px;"></canvas>

用于创建图表栏的Js代码:

Js Code for create chart bar:

window.onload = function () {       
var data = {
labels: [],
datasets: [
    {
        label: "My First dataset",
        fillColor: "rgba(220,220,220,2)",
        strokeColor: "rgba(220,220,220,2)",
        pointColor: "rgba(220,220,220,2)",
        pointStrokeColor: "#fff",
        pointHighlightFill: "#fff",
        pointHighlightStroke: "rgba(220,220,220,2)"
    },
    {
        label: "My Second dataset",
        fillColor: "rgba(12, 18, 51, 1)",
        strokeColor: "rgba(12, 18, 51, 1)",
        pointColor: "rgba(12, 18, 51, 1)",
        pointStrokeColor: "#fff",
        pointHighlightFill: "#fff",
        pointHighlightStroke: "rgba(12, 18, 51, 1)"
    }
]
};

var ctx = jQuery("#myChart")[0].getContext('2d');
var options = {   
scaleBeginAtZero : true,   
scaleShowGridLines : true,    
scaleGridLineColor : "rgba(0,0,0,.05)",  
scaleGridLineWidth : 1,    
scaleShowHorizontalLines: true,   
scaleShowVerticalLines: false,   
barShowStroke : true,
barStrokeWidth : 2,   
barValueSpacing : 10,    
barDatasetSpacing : 1,

legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].fillColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>"

}
var myLineChart = new Chart(ctx).Bar(data, options);
<?php foreach($resultGraph as $share){?>

myLineChart.addData([<?php echo $share->shCOunt;?>, <?php echo $share->tt;?>], "<?php echo $share->post_date1;?>"); 
<?php } ?>

//myLineChart.addData([30, 50], "January");

}   

</script>

推荐答案

请确保您未在​​canvas元素中添加一些CSS.以我为例，我发现我在canvas元素上添加了border属性，这导致了文本和条形模糊的问题.

Make sure that you don't adding some css to the canvas element. In my case I found that I am adding border property to the canvas element what was causing the problem of blur on text and bars.

不要使用类似的东西:

canvas { border: 1px solid #000 }

或ID(例如您的示例):

or with id like in your example :

#myChart { border: 1px solid #000 }

这篇关于如何修复图表JS中的模糊图表问题?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！