Load Chart.js lazily in AngularJS when the tab is switched

I currently have a canvas within a tab that is unable to display after the page has fully loaded:

<canvas class="chart chart-radar m-t-xs" data="level" labels="label"></canvas>

The chart's data is retrieved through a $http request (lazy loaded).

If I click on the tab right when the page loads, the chart displays perfectly and everyone is happy :)

However, if I stay on the tab while the data loads into the chart and then switch tabs like a normal user would, the chart doesn't appear (it seems like it's not rendering).

This isn't the first time I've encountered this issue, and I was hoping that someone else out there has experienced the same thing and knows of a workaround?

javascriptangularjschart.js

Answer №1

To display the chart only when the tab is opened, ensure that you create the chart on tab open and not before. In other words, lazily render your chart :-)

Check out the fiddle - http://jsfiddle.net/3x7uu5eh/

This specific section displays the content of our tab and simultaneously generates the chart.

// This function shows our tab
$("#tabButton").bind("click", function () {
    $("#tabPane").show();
    
    // To highlight the issue, move this part outside the function
    var ctx = $("#myChart").get(0).getContext("2d");
    var myLineChart = new Chart(ctx).Line(data);
})

If you relocate the indicated segment outside the show tab function, the chart will not be rendered as expected - demonstrating the problem.

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