Echart.js charts isn't showing tooltip

Question

I am using Echart.js library.

var echartLine = echarts.init(document.getElementById('myChart'), theme);

In echart option I add :

tooltip: {
                    show: true,
                    showContent: true,
                    alwaysShowContent: true,
                    triggerOn: 'mousemove',
                    trigger: 'axis',
                    axisPointer:
                        {
                            label: {
                                show: true,
                            }
                        }

                }, 

Tooltip don't appear. Image is bellow.

Answer 1

for visitors: do not use canvas as container, init your echarts with div instead, tooltips should show then.

Answer 2

Change the option trigger: 'axis' to trigger: 'item' and it should work like a charm.