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javascript - 动态追加 DIV 到 CodeMirror(不替换初始代码)

转载 作者:行者123 更新时间:2023-11-29 19:50:05 33 4
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我可以像这样动态地将 DIV 嵌入到 CodeMirror 中。但是我不想用以下代码替换我的初始代码。无论如何,我可以在不清除我的初始代码的情况下 append 它吗?

示例 - http://liveweave.com/nJthjR

$("a#div").click(function() {
editor.setValue('<div class="gendiv">gendiv</div>');
});

JavaScript

var delay;

// Initialize CodeMirror editor
var editor = CodeMirror.fromTextArea(document.getElementById('code'), {
mode: 'text/html',
tabMode: 'indent',
lineNumbers: true,
lineWrapping: true,
autoCloseTags: true
});

// Live preview
editor.on("change", function() {
clearTimeout(delay);
delay = setTimeout(updatePreview, 300);
});

function updatePreview() {
var previewFrame = document.getElementById('preview');
var preview = previewFrame.contentDocument || previewFrame.contentWindow.document;
preview.open();
preview.write(editor.getValue());
preview.close();
}
setTimeout(updatePreview, 300);

完整代码

<!Doctype html>
<html>
<head>
<meta charset="utf-8">
<title>CodeMirror: HTML5 preview</title>
<script src=http://codemirror.net/lib/codemirror.js></script>
<script src=http://codemirror.net/mode/xml/xml.js></script>
<script src=http://codemirror.net/mode/javascript/javascript.js></script>
<script src=http://codemirror.net/mode/css/css.js></script>
<script src=http://codemirror.net/mode/htmlmixed/htmlmixed.js></script>
<link rel=stylesheet href=http://codemirror.net/lib/codemirror.css>
<link rel=stylesheet href=http://codemirror.net/doc/docs.css>
<style type=text/css>
.CodeMirror {
float: left;
width: 50%;
border: 1px solid black;}

iframe {
width: 49%;
float: left;
height: 300px;
border: 1px solid black;
border-left: 0px;}
</style>
</head>
<body>
<h1>CodeMirror: HTML5 preview</h1>
<textarea id=code name=code><!doctype html>
<html>
<head>
<meta charset=utf-8>
<title>HTML5 canvas demo</title>
<style>p {font-family: monospace;}</style>
</head>
<body>
<p>Canvas pane goes here:</p>
<canvas id=pane width=300 height=200></canvas>
<script>
var canvas = document.getElementById('pane');
var context = canvas.getContext('2d');

context.fillStyle = 'rgb(250,0,0)';
context.fillRect(10, 10, 55, 50);

context.fillStyle = 'rgba(0, 0, 250, 0.5)';
context.fillRect(30, 30, 55, 50);
</script>
</body>
</html></textarea>
<iframe id=preview></iframe>
<a href="#my-header" onclick='DivGen()'>Generate DIV</a>

<script>
var delay;

// Initialize CodeMirror editor
var editor = CodeMirror.fromTextArea(document.getElementById('code'), {
mode: 'text/html',
tabMode: 'indent',
lineNumbers: true,
lineWrapping: true,
autoCloseTags: true
});

// Live preview
editor.on("change", function() {
clearTimeout(delay);
delay = setTimeout(updatePreview, 300);
});

function updatePreview() {
var previewFrame = document.getElementById('preview');
var preview = previewFrame.contentDocument || previewFrame.contentWindow.document;
preview.open();
preview.write(editor.getValue());
preview.close();
}
setTimeout(updatePreview, 300);

function destroyClickedElement(event) {
document.body.removeChild(event.target);}

function DivGen() {
editor.setValue('<div class="gendiv">gendiv</div>');}
</script>
</body>
</html>

最佳答案

使用replaceRange() :

function DivGen() { 
editor.replaceRange(
'<div class="gendiv">gendiv</div>\n', {line: 9,ch: 0}, {line: 9,ch: 0});
}

你也可以基于光标位置:

function DivGen() {
editor.replaceRange(
'<div class="gendiv">gendiv</div>\n', editor.getCursor());
}

关于javascript - 动态追加 DIV 到 CodeMirror(不替换初始代码),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18046144/

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