在基于GET的文本区域中找到文本字符串，然后将光标移至该文本 [英] locate text string in textarea based on GET and move cursor to that text
本文介绍了在基于GET的文本区域中找到文本字符串，然后将光标移至该文本的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的表格中的文本区域id ="Fulltext"由数据库提供，包含一本书的许多章节.
当用户单击文本区域上方的链接时，
<a href="samePage.php?chap=Chapter 5" id="Chapter 5">Chapter 5</a>，我希望光标在文本区域内移动并将其自身定位在文本的第5章"前面.
这可能吗?
The textarea in my form, id="Fulltext", is fed by database with many chapters of a book.
When the user clicks a link above the text area,
<a href="samePage.php?chap=Chapter 5" id="Chapter 5">Chapter 5</a>, I would like the cursor to move inside the textarea and position itself in front of the text, 'Chapter 5'.
Is this possible?
推荐答案
演示: http://jsfiddle.net/deg6j/
HTML
<html>
<head>
<script type="text/javascript">
function selectText(text)
{
var textArea = $('#Fulltext');
var index = textArea.text().search(text);
textArea.caretTo(index);
}
</script>
</head>
<body>
<textarea id='Fulltext' rows=10>
Chapter 1
This is a lot of text...
Chapter 2
More more more
Chapter 3
More dsa less
</textarea>
<a href="#" onclick="selectText('Chapter 2')">Chapter 2</a>
</body>
</html>
JavaScript
Javascript
new function($) {
// Behind the scenes method deals with browser
// idiosyncrasies and such
$.caretTo = function (el, index) {
if (el.createTextRange) {
var range = el.createTextRange();
range.move("character", index);
range.select();
} else if (el.selectionStart != null) {
el.focus();
el.setSelectionRange(index, index);
}
};
// The following methods are queued under fx for more
// flexibility when combining with $.fn.delay() and
// jQuery effects.
// Set caret to a particular index
$.fn.caretTo = function (index, offset) {
return this.queue(function (next) {
if (isNaN(index)) {
var i = $(this).val().indexOf(index);
if (offset === true) {
i += index.length;
} else if (offset) {
i += offset;
}
$.caretTo(this, i);
} else {
$.caretTo(this, index);
}
next();
});
};
}(jQuery);
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