落花有意随流水，流水无心蝶恋花
最近在做一个类似下面的功能：
1576576638695.jpg
由于
textarea不能满足该要求，所以只有通过div来实现，由于时间关系就不在这里啰嗦了，直接上代码
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<%@include file="/common/common.jsp" %>
<style type="text/css">
h3{margin-bottom:10px;margin-top: 20px;}
.tip{color:grey;font-style: italic;margin-left: 20px;}
</style>
</head>
<body>
<div class="page">
<div class="page-content">
<h3>标准按钮</h3>
<button class="ui-button ui-button-primary mr-2">按钮</button>
<button class="ui-button ui-button-success mr-2">按钮</button>
<button class="ui-button ui-button-warning mr-2">按钮</button>
<button id="sendEmoji" class="ui-button ui-button-error mr-2">添加标签按钮</button>
</div>
<div id="editor" placeholder="请输入您的内容" contenteditable="true"
style="overflow-y:scroll;width: 500px;height: 300px;margin-left: 100px; line-height: 20px">
</div>
</div>
<script type="text/javascript">
var inputResizeDom;
var edit = document.getElementById('editor')
var sendEmoji = document.getElementById('sendEmoji')
// 定义最后光标对象
var lastEditRange;
// 编辑框点击事件
edit.onclick = function() {
// 获取选定对象
var selection = getSelection()
// 设置最后光标对象
lastEditRange = selection.getRangeAt(0)
}
// 编辑框按键弹起事件
edit.onkeyup = function() {
// 获取选定对象
var selection = getSelection()
// 设置最后光标对象
lastEditRange = selection.getRangeAt(0)
}
/* 此处代码可以屏蔽掉，这是每次插入后定位到末尾的代码
editor.onfocus = function () {
window.setTimeout(function () {
var sel,range;
if (window.getSelection && document.createRange) {
range = document.createRange();
range.selectNodeContents(editor);
range.collapse(true);
range.setEnd(editor, editor.childNodes.length);
range.setStart(editor, editor.childNodes.length);
sel = window.getSelection();
sel.removeAllRanges();
sel.addRange(range);
} else if (document.body.createTextRange) {
range = document.body.createTextRange();
range.moveToElementText(editor);
range.collapse(true);
range.select();
}
}, 1);
}
*/
// 表情点击事件
sendEmoji.onclick = function() {
insertAtCursorDiv(edit,"添加标签按钮");
}
//插入标签
function insertAtCursorDiv(myField, myValue) {
// 编辑框设置焦点
myField.focus()
// 获取选定对象
var selection = window.getSelection();//getSelection()
// 判断是否有最后光标对象存在
if (lastEditRange) {
// 存在最后光标对象，选定对象清除所有光标并添加最后光标还原之前的状态
selection.removeAllRanges()
selection.addRange(lastEditRange)
}
var emojiText = document.createElement("input")
emojiText.setAttribute("value", "标签的文字");
emojiText.setAttribute("data-code", "123");
emojiText.setAttribute("disabled", 'true');
emojiText.style.width = input_resize("标签的文字") + 'px';
emojiText.style.background = 'lightskyblue';
emojiText.style.borderRadius = '10px';
emojiText.style.textAlignLast = 'center';
emojiText.style.font = '16px';
insertHtmlAtCaret(emojiText.outerHTML);
// 无论如何都要记录最后光标对象
lastEditRange = selection.getRangeAt(0)
}
var modalVm = avalon.define({
$id:'inputLabel',
});
componentDidMount();
function componentDidMount(){
//增加隐藏节点，编辑模板时计算标签宽度
if($('.hidden').length < 1){
inputResizeDom = document.createElement('span');
inputResizeDom.setAttribute('class', 'hide-dom');
document.getElementsByTagName('body')[0].appendChild(inputResizeDom);
}
}
function input_resize(html) {
inputResizeDom.innerHTML = html;
inputResizeDom.style.fontSize = '16px';
return inputResizeDom.getBoundingClientRect().width.toFixed(4);
}
function insertHtmlAtCaret(html) {
var sel, range;
if (window.getSelection) {
sel = window.getSelection();
if (sel.getRangeAt && sel.rangeCount) {
range = sel.getRangeAt(0);
range.deleteContents();
var el = document.createElement("input");
el.innerHTML = html;
var frag = document.createDocumentFragment(), node, lastNode;
while ( (node = el.firstChild) ) {
lastNode = frag.appendChild(node);
}
range.insertNode(frag);
if (lastNode) {
range = range.cloneRange();
range.setStartAfter(lastNode);
range.collapse(true);
sel.removeAllRanges();
sel.addRange(range);
}
}
} else if (document.selection && document.selection.type != "Control") {
document.selection.createRange().pasteHTML(html);
}
}
</script>
</body>
</html>
这是一个比较全的代码，当然还是有参考文章的
js之向div contenteditable光标位置添加字符
js-处理div设置的编辑框处理焦点定位追加内容
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