我在我满意的div中有这个。每当我键入#something,然后输入空格,我想在该div中立即加粗该单词。
E.g。
这是我的留言。 #大声笑。我想加粗标签。
以下是我的代码
<div id="message" name="message" contenteditable="true"></div>
$('#message').keyup(function(e){
var len = $(this).val().length;
if ($(this).val().substring(length - 1, 1) == '#') {
}
//detect space
if(e.keyCode == 32){
}
});
我正在使用jquery。我该怎么做呢?
答案 0 :(得分:2)
使用contenteditable = "true"
可能很棘手,但这是一个可能的解决方案:
如果单词前面带有#
,则文字为粗体<div id="divEditable" contenteditable="true"></div>
我们将拆分代码,但实际上它包含在IIFE中
/*** Cached private variables ***/
var _break = /<br\s?\/?>$/g,
_rxword = /(#[\w]+)$/gm,
_rxboldDown = /<\/b>$/gm,
_rxboldUp = /<\/b>(?!<br\s?\/?>)([\w]+)(?:<br\s?\/?>)?$/,
_rxline = /(<br\s?\/?>)+(?!<b>)(<\/b>$)+/g;
/*** Handles the event when a key is pressed ***/
$(document).on("keydown.editable", '.divEditable', function (e) {
//fixes firefox NodeContent which ends with <br>
var html = this.innerHTML.replace(_break, ""),
key = (e.which || e.keyCode),
dom = $(this);
//space key was pressed
if (key == 32 || key == 13) {
//finds the # followed by a word
if (_rxword.test(dom.text()))
dom.data("_newText", html.replace(_rxword, "<b>$1</b> "));
//finds the end of bold text
if (_rxboldDown.test(html))
dom.data("_newText", html + " ");
}
//prevents the bold NodeContent to be cached
dom.attr("contenteditable", false).attr("contenteditable", true);
});
/*** Handles the event when the key is released ***/
$(document).on("keyup.editable", '.divEditable', function (e) {
var dom = $(this),
newText = dom.data("_newText"),
innerHtml = this.innerHTML,
html;
//resets the NodeContent
if (!dom.text().length || innerHtml == '<br>') {
dom.empty();
return false;
}
//fixes firefox issue when text must follow with bold
if (!newText && _rxboldUp.test(innerHtml))
newText = innerHtml.replace(_rxboldUp, "$1</b>");
//fixes firefox issue when space key is rendered as <br>
if (!newText && _rxline.test(innerHtml)) html = innerHtml;
else if (newText && _rxline.test(newText)) html = newText;
if (html) newText = html.replace(_rxline, "$2$1");
if (newText && newText.length) {
dom.html(newText).removeData("_newText");
placeCaretAtEnd(this);
}
});
/*** Sets the caret position at end of NodeContent ***/
function placeCaretAtEnd (dom) {
var range, sel;
dom.focus();
if (typeof window.getSelection != "undefined"
&& typeof document.createRange != "undefined") {
range = document.createRange();
range.selectNodeContents(dom);
range.collapse(false);
sel = window.getSelection();
sel.removeAllRanges();
sel.addRange(range);
} else if (typeof document.body.createTextRange != "undefined") {
//this handles the text selection in IE
range = document.body.createTextRange();
range.moveToElementText(dom);
range.collapse(false);
range.select();
}
}
您可以在此处使用实时代码:jsbin.com/zisote
答案 1 :(得分:1)
这是一个示例。可编辑的div虽然不是一个好主意。试着改变这个。 textarea可能更好......
http://jsfiddle.net/blackjim/h9dck/5/
function makeBold(match, p1, p2, p3, offset, string) {
return p1+'<b>' + p2 + '</b>'+p3;
};
$('#message').keyup(function (e) {
var $this = $(this);
//detect space
if (e.keyCode == 32) {
var innerHtml = $this.html();
innerHtml = innerHtml.replace(/(.*[\s|($nbsp;)])(#\w+)(.*)/g, makeBold);
if(innerHtml !== $this.html()){
$this.html(innerHtml)
.focus();
}
}
});