Javascript 未捕获类型错误：无法读取属性'；渲染'；main.js:48中未定义的

我是编程新手。我想在浏览器上渲染画布

我的代码在这里

// implement canvas js
let dataPoints = [
    {label: 'One', y: 0},
    {label: 'Two', y: 0},
    {label: 'Three', y: 0},
    {label: 'Four', y: 0}
];

const myContainer = document.querySelector(
    '#mytContainer'
);

if(cmytContainer){
    const chart = CanvasJS.Chart('mytContainer', {
        animationEnabled: true,
        theme: 'theme1',
        title: {
            text: 'My Results'
        },
        data: [
            {
                type: 'column',
                dataPoints: dataPoints
            }
        ]
    });
    chart.return()
}

请身边的人帮忙。

---

提前感谢

我认为错误是由于条件变量输入错误更改为myContainer

let dataPoints = [
    {label: 'One', y: 0},
    {label: 'Two', y: 0},
    {label: 'Three', y: 0},
    {label: 'Four', y: 0}
];

const myContainer = document.querySelector(
    '#mytContainer'
);

if(myContainer){
    const chart = CanvasJS.Chart('mytContainer', {
        animationEnabled: true,
        theme: 'theme1',
        title: {
            text: 'My Results'
        },
        data: [
            {
                type: 'column',
                dataPoints: dataPoints
            }
        ]
    });
    chart.return()
}

---

在哪里调用渲染函数？您应该提供更多的代码。或者是否有输入错误，“return（）”应该是“render（）”？您确定正确包含了ChartJS库吗？