我正在尝试抓取Codemirror中的<title>标记并将其值设置为输入[type = text]值。但是我继续得到一个整数而不是文本。
在此示例中，它是“HTML5 canvas demo”。当然它会改变。
$(document).ready(function() {
var dest = $(".projectname");
var editorTitle = editor.getValue().search("<title>");
dest.val(editorTitle).val(dest.val().split(" ").join(""));
});
var delay;
// Initialize CodeMirror editor
var editor = CodeMirror.fromTextArea(document.getElementById('code'), {
mode: 'text/html',
tabMode: 'indent',
styleActiveLine: true,
lineNumbers: true,
lineWrapping: true,
autoCloseTags: true,
foldGutter: true,
dragDrop : true,
gutters: ['CodeMirror-linenumbers', 'CodeMirror-foldgutter']
});
// 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);.CodeMirror, iframe {
border: 1px solid black;
}
.CodeMirror, iframe, .projectname {
float: left;
}
.CodeMirror {
width: 50%;
}
iframe {
width: 49%;
height: 300px;
border-left: 0;
}
.projectname {
width: 99.4%;
}<!DOCTYPE html>
<html>
<head>
<title>Codemirror: Grab Title Value</title>
<meta charset='utf-8'>
<meta name='viewport' content='initial-scale=1.0'>
<meta http-equiv='X-UA-Compatible' content='IE=9' />
<link type='text/css' rel='stylesheet' href='http://necolas.github.io/normalize.css/3.0.1/normalize.css'/>
<script type='text/javascript' src='http://code.jquery.com/jquery-latest.min.js'></script>
<script src='http://codemirror.net/lib/codemirror.js'></script>
<link rel='stylesheet' href='http://codemirror.net/lib/codemirror.css'>
<link rel='stylesheet' href='http://codemirror.net/addon/fold/foldgutter.css' />
<script src='http://codemirror.net/javascripts/code-completion.js'></script>
<script src='http://codemirror.net/javascripts/css-completion.js'></script>
<script src='http://codemirror.net/javascripts/html-completion.js'></script>
<script src='http://codemirror.net/mode/javascript/javascript.js'></script>
<script src='http://codemirror.net/mode/xml/xml.js'></script>
<script src='http://codemirror.net/mode/css/css.js'></script>
<script src='http://codemirror.net/mode/htmlmixed/htmlmixed.js'></script>
<script src='http://codemirror.net/addon/edit/closetag.js'></script>
<script src='http://codemirror.net/addon/edit/matchbrackets.js'></script>
<script src='http://codemirror.net/addon/selection/active-line.js'></script>
<script src='http://codemirror.net/keymap/extra.js'></script>
<script src='http://codemirror.net/addon/fold/foldcode.js'></script>
<script src='http://codemirror.net/addon/fold/foldgutter.js'></script>
<script src='http://codemirror.net/addon/fold/brace-fold.js'></script>
<script src='http://codemirror.net/addon/fold/xml-fold.js'></script>
<script src='http://codemirror.net/addon/fold/comment-fold.js'></script>
</head>
<body>
<div>
<input type="text" class="projectname" placeholder="Find title tag in editor and add what's inside it here..." />
</div>
<textarea id='code' name='code'><!doctype html>
<html>
<head>
<meta charset=utf-8>
<title>HTML5 canvas demo</title>
</head>
<body>
hello world!
</body>
</html></textarea>
<iframe id='preview'></iframe>
</body>
</html>您获得的整数是标题标记中的“<”索引。要获得标题，您可以使用regEx。
var content = editor.getValue();
var openTagIndex = content.search(/<title/);
var closeTagIndex = content.search(/<\/title>/);
var titleTag = content.slice(openTagIndex , closeTagIndex);
var editorTitle = titleTag.slice(titleTag.search(/>/) + 1);