TypeError: Cannot read property 'currentStyle' of null in chart.js

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I'm trying to update my pie chart (using Chart.js) every time an input field is modified. I am doing this by replacing the existing graph with an empty canvas and then redrawing it. This is working, but causing me to get a "TypeError: Cannot read property 'currentStyle' of null".

The code is below,

function drawSummaryPie() {
$('#myChart').replaceWith('<canvas id="myChart" width="200" height="200"></canvas>');
draw(); 
}[enter image description here][1]   

Error :

and any help would be appreciated!

HTML:

<div id="line_chart" style="padding-bottom: 20px;">               
 <canvas id="chartJSContainer" height="100"></canvas>
</div>

JS :

$('#chartJSContainer').remove();
$('#line_chart').html('<canvas id="chartJSContainer" height="100"></canvas>'); 
var linectxx = document.getElementById('chartJSContainer').getContext('2d');
var newlinechart = new Chart(linectxx, options1);

Its working for me. Used .html() instead of .append :)

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I solve this problem puting the canvas inside a div, like:

<div style="width:75%;">
    <canvas id="canvas"></canvas>
</div>

or in JS:

var div = document.createElement('div');
div.style = "width:100%;";
canvas = document.createElement('canvas');
div.appendChild(canvas);

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The solution of Marcio Rossato did not work for me but this one did :

See here the answer of Valentin : Solution for "Cannot read property 'currentStyle' of null in ChartJS"

I downloaded the file and modified it, no error occures now :)

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Comments
  • could you just provide more complete code for us to know what problem in it? just those code couldn't do any help to figure out what problem.