[JavaScript知识库]bootstrap模态框中的不显示echarts折线图，解决方案

<div class="modal fade" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title">统计</h5>
                    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                        <span aria-hidden="true">&times;</span>
                    </button>
                </div>
                <div class="modal-body">
                    <div id="echart_line" style="height:250px;width: 450px"></div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-dismiss="modal">关闭</button>
                </div>
            </div>
        </div>
    </div>

解决方法1. 去掉fade样式，可能是echarts不能在hidden的div渲染。

 <div class="modal" tabindex="-1">

解决方法 2. 模态框显示事件中，重新初始化Echarts

$('.modal').on('show.bs.modal', function () {
        myChart.resize()
    })

解决方法 3. 检查模态框的Echarts容器有没有设置width和height

 <div class="modal-body">
      <div id="echart_line" style="height:250px;width: 450px"></div>
 </div>