嗨，这是简单的 jquery 字段选择插件。
/*
* jQuery plugin: fieldSelection - v0.1.1 - last change: 2006-12-16
* (c) 2006 Alex Brem <alex@0xab.cd> - http://blog.0xab.cd
*/
(function() {
var fieldSelection = {
getSelection: function() {
var e = (this.jquery) ? this[0] : this;
return (
/* mozilla / dom 3.0 */
('selectionStart' in e && function() {
var l = e.selectionEnd - e.selectionStart;
return { start: e.selectionStart, end: e.selectionEnd, length: l, text: e.value.substr(e.selectionStart, l) };
}) ||
/* exploder */
(document.selection && function() {
e.focus();
var r = document.selection.createRange();
if (r === null) {
return { start: 0, end: e.value.length, length: 0 }
}
var re = e.createTextRange();
var rc = re.duplicate();
re.moveToBookmark(r.getBookmark());
rc.setEndPoint('EndToStart', re);
return { start: rc.text.length, end: rc.text.length + r.text.length, length: r.text.length, text: r.text };
}) ||
/* browser not supported */
function() { return null; }
)();
},
replaceSelection: function() {
var e = (typeof this.id == 'function') ? this.get(0) : this;
var text = arguments[0] || '';
return (
/* mozilla / dom 3.0 */
('selectionStart' in e && function() {
e.value = e.value.substr(0, e.selectionStart) + text + e.value.substr(e.selectionEnd, e.value.length);
return this;
}) ||
/* exploder */
(document.selection && function() {
e.focus();
document.selection.createRange().text = text;
return this;
}) ||
/* browser not supported */
function() {
e.value += text;
return jQuery(e);
}
)();
}
};
jQuery.each(fieldSelection, function(i) { jQuery.fn[i] = this; });
})();
我不明白为什么这样做不会替换 textarea 元素中的选定文本。
$('.wysiwyg-editor-italic').live('click',function(){
var _selection = $('.wysiwyg textarea').getSelection().text;
var wcode = "";
if(_selection){
$('.wysiwyg textarea').replaceSelection("{italic}"+_selection+"{/italic}");
console.log(_selection);
}
else{
wcode = "{italic} italic {/italic}";
}
var wysiwyg_val = $('.wysiwyg textarea').val();
$('.wysiwyg textarea').val("").val(wysiwyg_val+wcode);
$('.wysiwyg-preview').html(wysiwyg_val);
$('.wysiwyg textarea').focus();
refresh_preview()
});
在控制台中，我可以看到_selection哪个没问题，但之后没有被替换……也许我错过了什么？