test/tooltip-rich.html

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<html>
    <head>
        <meta charset="utf-8">
        <script src="lib/simpleRequire.js"></script>
        <script src="lib/config.js"></script>
        <meta name="viewport" content="width=device-width, initial-scale=1" />
    </head>
    <body>
        <style>
            html, body, #main {
                width: 100%;
                height: 100%;
                margin: 0;
            }
            #main {
                background: #fff;
            }
            #btn-dispose {
                position: absolute;
                left: 10px;
                top: 10px;
                z-index: 1;
            }
        </style>
        <button type="button" id="btn-dispose">Dispose chart</button>
        <div id="main"></div>
        <script>

            require(['echarts'], function (echarts) {

                var chart = echarts.init(document.getElementById('main'));

                chart.setOption({
                    backgroundColor: '#eee',
                    tooltip: {
                        show: true,
                        renderMode: 'richText',
                        enterable: true,
                        // position: [100, 100],
                        trigger: 'axis',
                        z: 100
                    },
                    yAxis: {
                        type: 'value'
                    },
                    xAxis: {
                        type: 'category',
                        data: ['A', 'B', 'C']
                    },
                    series: [{
                        name: 'bar0',
                        type: 'bar',
                        data: [2, 3, 6]
                    }, {
                        name: 'bar1',
                        type: 'bar',
                        data: [1, 0, 9]
                    }, {
                        name: 'bar2',
                        type: 'bar',
                        data: ['-', 2, 1]
                    }]
                });

                window.onresize = chart.resize;

                // fix #12607: to dispose the rich tooltip
                document.getElementById('btn-dispose').addEventListener('click', function () {
                    chart.dispose();
                });
            });
        </script>
    </body>
</html>