Codepen 中的代码运行不适用于 vscode

Question

Javascript codes 在 codepen 上工作，但是当我用 vscode 测试它时，形状没有出现并且下载按钮不起作用，所以 javascript codes 不工作。

https://codepen.io/rebelchris/pen/rNevrXg

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
const download = document.getElementById('download');

// Cirlce
ctx.beginPath();
ctx.arc(100, 100, 50, 0, 2 * Math.PI);
ctx.stroke();

// Triangle
ctx.beginPath();
ctx.moveTo(200, 75);
ctx.lineTo(100, 75);
ctx.lineTo(100, 25);
ctx.fill();

// Hearth
ctx.beginPath();
ctx.moveTo(75, 40);
ctx.bezierCurveTo(75, 37, 70, 25, 50, 25);
ctx.bezierCurveTo(20, 25, 20, 62.5, 20, 62.5);
ctx.bezierCurveTo(20, 80, 40, 102, 75, 120);
ctx.bezierCurveTo(110, 102, 130, 80, 130, 62.5);
ctx.bezierCurveTo(130, 62.5, 130, 25, 100, 25);
ctx.bezierCurveTo(85, 25, 75, 37, 75, 40);
ctx.stroke();

download.addEventListener('click', function(e) {
  console.log(canvas.toDataURL());
  var link = document.createElement('a');
  link.download = 'download.png';
  link.href = canvas.toDataURL();
  link.click();
  link.delete;
});

Answer 1

不知道为什么你做不到。以下是供您参考的代码

<html>
<head>
    <style>
        // Code in CSS part goes here...
        canvas {
            border: 1px solid #000;
        }
    </style>
</head>
<body>
    
    <!-- Code under HTML goes here -->
    <canvas id="canvas" height="200"></canvas>
    <br />
    <button id="download">Download</button>

    <script>
        // Code under Javascript goes here
        const canvas = document.getElementById('canvas');
        const ctx = canvas.getContext('2d');
        const download = document.getElementById('download');

        // Cirlce
        ctx.beginPath();
        ctx.arc(100, 100, 50, 0, 2 * Math.PI);
        ctx.stroke();

        // Triangle
        ctx.beginPath();
        ctx.moveTo(200, 75);
        ctx.lineTo(100, 75);
        ctx.lineTo(100, 25);
        ctx.fill();

        // Hearth
        ctx.beginPath();
        ctx.moveTo(75, 40);
        ctx.bezierCurveTo(75, 37, 70, 25, 50, 25);
        ctx.bezierCurveTo(20, 25, 20, 62.5, 20, 62.5);
        ctx.bezierCurveTo(20, 80, 40, 102, 75, 120);
        ctx.bezierCurveTo(110, 102, 130, 80, 130, 62.5);
        ctx.bezierCurveTo(130, 62.5, 130, 25, 100, 25);
        ctx.bezierCurveTo(85, 25, 75, 37, 75, 40);
        ctx.stroke();

        download.addEventListener('click', function(e) {
            console.log(canvas.toDataURL());
            var link = document.createElement('a');
            link.download = 'download.png';
            link.href = canvas.toDataURL();
            link.click();
            link.delete;
        });
    </script>
</body>
</html>

Codepen 中的代码运行不适用于 vscode

Code running in Codepen does not work on vscode

local

visual-studio-code

codepen

Codepen 中的代码 运行 不适用于 vscode

Code running in Codepen does not work on vscode

local

visual-studio-code

codepen

Codepen 中的代码运行不适用于 vscode