test/tooltip.html

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<html>
    <head>
        <meta charset="utf-8">
        <script src="esl.js"></script>
        <script src="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 {
                width: 1000px;
                background: #fff;
            }
        </style>
        <div id="main"></div>
        <script>

            require([
                'echarts',
                'echarts/chart/bar',
                'echarts/component/legend',
                'echarts/component/grid',
                'echarts/component/tooltip'
            ], function (echarts) {

                var chart = echarts.init(document.getElementById('main'), null, {
                    renderer: 'canvas'
                });

                var xAxisData = [];
                var data1 = [];
                var data2 = [];
                var data3 = [];
                var data4 = [];

                for (var i = 0; i < 10; i++) {
                    xAxisData.push('类目' + i);
                    data1.push((Math.random() * 5).toFixed(2));
                    data2.push(-Math.random().toFixed(2));
                    data3.push((Math.random() + 0.5).toFixed(2));
                    data4.push((Math.random() + 0.3).toFixed(2));
                }

                chart.setOption({
                    legend: {
                        data: ['坐标轴触发1', '坐标轴触发2', '数据项触发', '不显示的数据项触发'],
                        tooltip: {
                            show: true,
                            formatter: null
                        }
                    },
                    tooltip : {         // Option config. Can be overwrited by series or data
                        trigger: 'axis',
                        //show: true,   //default true
                        showDelay: 50,