如何在 DIV 中添加 html5 画布

How to add a html5 CANVAS within a DIV

本文关键字：添加 html5 画布 DIV      更新时间：2023-09-26

我正在使用以下代码生成canvas。 目前它将画布元素添加到body，我怎样才能让它添加到名为"divGameStage"的div中，该除了body之外，它没有嵌套在任何其他元素中。

编辑：我已经尝试了第一个建议，但没有出现画布，完整代码如下：

<head>
<meta charset="utf-8">
<title>Game Stage</title>
<script type="text/javascript">
    function loadCanvas(id) {
        var canvas = document.createElement('canvas');
        div = document.getElementByID(id); 
        canvas.id     = "CursorLayer";
        canvas.width  = 1224;
        canvas.height = 768;
        canvas.style.zIndex   = 8;
        canvas.style.position = "absolute";
        canvas.style.border   = "1px solid";
        div.appendChild(canvas)
    }
        </script>
</head>
<body>
<header>
    <h1>The most important heading on this page</h1>
    <p>With some supplementary information</p>
</header>
<div id="divControls"></div>
<div id="divGameStage"></div>
<script type="text/javascript">
    loadCanvas(divGameStage);
</script>
</body>
</html>

只需尝试此代码，肯定会为您工作：

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Game Stage</title>
<script type="text/javascript">
    function loadCanvas(id) {
        var canvas = document.createElement('canvas');
        div = document.getElementById(id); 
        canvas.id     = "CursorLayer";
        canvas.width  = 1224;
        canvas.height = 768;
        canvas.style.zIndex   = 8;
        canvas.style.position = "absolute";
        canvas.style.border   = "1px solid";
        div.appendChild(canvas)
    }
</script>
</head>
<body>
<header>
    <h1>The most important heading on this page</h1>
    <p>With some supplementary information</p>
</header>
<div id="divControls"></div>
<div id="divGameStage"></div>
<script type="text/javascript">
    loadCanvas("divGameStage");
</script>
</body>
</html>

请记住一些事项：

  • 错误 1 是 loadCanvas("divGameStage"(中缺少引号;
  • 错误 2 是语法错误div = document.getElementById(id(;'"..ID(id("在您的代码中。

如果它也不起作用，那么我相信您正在Internet Explorer上对其进行测试(specially < IE9)
如果是这种情况，仅供参考，IE9及以上版本支持画布，没有其他较小版本支持画布

干杯！！！

您只需将其附加到<div>而不是正文：

<script type="text/javascript">
    function loadCanvas(id) {
        var canvas = document.createElement('canvas'),
            div = document.getElementById(id);
        canvas.id     = "canvGameStage";
        canvas.width  = 1000;
        canvas.height = 768;
        canvas.style.zIndex   = 8;
        canvas.style.position = "absolute";
        canvas.style.border   = "1px solid";
        div.appendChild(canvas);
    }
    /* ... */
    loadCanvas("divGameStage");
</script>

很简单：-(

<script type="text/javascript">
    function loadCanvas() {
        var canvas = document.createElement('canvas');
        canvas.id     = "canvGameStage";
        canvas.width  = 1000;
        canvas.height = 768;
        canvas.style.zIndex   = 8;
        canvas.style.position = "absolute";
        canvas.style.border   = "1px solid";
        var div = document.createElement("div");
        div.className = "divGameStage";
        div.appendChild(canvas);
        document.body.appendChild(div)
    }
</script>

这里唯一的问题是：

loadCanvas(divGameStage);
用

引号括divGameStage：

loadCanvas("divGameStage");

因为它需要是一个字符串才能通过getElementById.

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