小编Dam*_*son的帖子

我有这样一个例子:

// Load the Visualization API and the piechart package.
        google.load('visualization', '1.0', {'packages':['corechart']});

        // Set a callback to run when the Google Visualization API is loaded.
        google.setOnLoadCallback(drawChart1);

        // Callback that creates and populates a data table,
        // instantiates the pie chart, passes in the data and
        // draws it.
        function drawChart1() {
            var data = new google.visualization.DataTable(
            {
                cols: [
                    {id: 'A', label: 'A', type: 'number'},
                    {id: 'B', label: 'B', type: 'number'},
                    {id: 'C', label: 'C', type:'tooltip', p:{role:'tooltip'}}
                ],
                rows: …