How to get the selected text in textarea using jQuery in Internet Explorer 7?
I tried the jquery-fieldselection plugin to get the selected text in textarea.
It works fine in Fi开发者_运维知识库refox and Chrome, but not in Internet Explorer 7.
I use the getSelection()
method like this:
textarea.getSelection();
When the text within the textarea is 12345
, and all this text is selected, Firefox and Chrome returns:
start: 0 // Correct!
end: 5
while Internet Explorer 7 returns:
start: 5 // Why ??
end: 5
I'm looking for a cross browser solution using jQuery.
just took a look a tthelibrary and it behaves differently for IE since it does not support some methods that the modern browsers do.. may be the code there isnt perfect..
use the following method:
function getInputSelection(el) {
var start = 0, end = 0, normalizedValue, range,
textInputRange, len, endRange;
if (typeof el.selectionStart == "number" && typeof el.selectionEnd == "number") {
start = el.selectionStart;
end = el.selectionEnd;
} else {
range = document.selection.createRange();
if (range && range.parentElement() == el) {
len = el.value.length;
normalizedValue = el.value.replace(/\r\n/g, "\n");
// Create a working TextRange that lives only in the input
textInputRange = el.createTextRange();
textInputRange.moveToBookmark(range.getBookmark());
// Check if the start and end of the selection are at the very end
// of the input, since moveStart/moveEnd doesn't return what we want
// in those cases
endRange = el.createTextRange();
endRange.collapse(false);
if (textInputRange.compareEndPoints("StartToEnd", endRange) > -1) {
start = end = len;
} else {
start = -textInputRange.moveStart("character", -len);
start += normalizedValue.slice(0, start).split("\n").length - 1;
if (textInputRange.compareEndPoints("EndToEnd", endRange) > -1) {
end = len;
} else {
end = -textInputRange.moveEnd("character", -len);
end += normalizedValue.slice(0, end).split("\n").length - 1;
}
}
}
}
return {
start: start,
end: end
};
}
how to use it:
you need the dom object of the textarea.. thus:
var textArea= $("textarea")[0] or getElementbyId("textareaid");
var selectedText=getInputSelection(textArea);
var start=selectedText.start;
var end=selectedText.end;
Live Demo
Here is a very concise and compact jquery plugin that works for IE7,IE8,IE9,FF,Chrome.. Allows you to get/set start & end position of a selection and also replace selected text programmatically. A working example/code version is here: http://jsfiddle.net/hYuzk/3/ A version with more detailed comments etc. is here: http://jsfiddle.net/hYuzk/4/
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