Google Intellij 上未加载图表

Google Charts Not Loading on Intellij

我正在尝试用 Google 图表制作饼图。当我将此代码放入 html 文件并 运行 它自己工作正常时。

这是它的样子:

但是,当我 运行 它在我的 Intellij 项目中时,什么也没有出现。

这是我的代码:

<div>

        <!--Load the AJAX API-->
        <!--script type="text/javascript" src="views/jsapi.js"></script-->
    <script type="text/javascript" src="https://www.google.com/jsapi"></script>

    <script type="text/javascript">
console.log("1");
    // Load the Visualization API and the piechart package.
    google.load('visualization', '1.1', {'packages':['corechart']});
console.log("2");

    // Set a callback to run when the Google Visualization API is loaded.
    google.setOnLoadCallback(drawChart);
console.log("3");

    // Callback that creates and populates a data table,
    // instantiates the pie chart, passes in the data and
    // draws it.
    function drawChart() {
        console.log("4");

        // Create the data table.
        var data = new google.visualization.DataTable();
        data.addColumn('string', 'Topping');
        data.addColumn('number', 'Slices');
        data.addRows([
            ['Mushrooms', 3],
            ['Onions', 1],
            ['Olives', 1],
            ['Zucchini', 1],
            ['Pepperoni', 2]
        ]);
        console.log("5");

        // Set chart options
        var options = {'title':'How Much Pizza I Ate Last Night',
            'width':400,
            'height':300};

        // Instantiate and draw our chart, passing in some options.
        var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
        chart.draw(data, options);
        console.log("6");

    }
console.log("7");

</script>
    <!--Div that will hold the pie chart-->
    <div id="content">
        <div id="chart_div"></div>
    </div>
</div>

为什么会这样?

我通过修改这行代码让它工作:

    google.load('visualization', '1', {packages: ['corechart']});

为此:

    google.load('visualization', '1', {packages: ['corechart'], callback : drawChart});

在这里查看 Zanona 的回答以获得进一步的解释:google.load causes empty dom/screen