這幾天使用H5開發了一個仿微信聊天前端界面，尤其微信底部編輯器那塊處理的很好，使用HTML5來開發，雖說功能效果並沒有微信那麽全，但是也相當不錯了，可以發送消息、表情，發送的消息自動回滾定位到底部，另外可以對消息、圖片、視頻有不同的右鍵處理提示，還有打賞、占屏等操作。

html代碼片段：

<!--BEGIN 打賞-->
<div class="js_dialog" id="J_Dialog_dashang" style="display: none;">
    <!--<div class="weui-mask"></div>-->
 

    <div class="weui-dialog">
        <i class="weui-xclose"></i>
        <div class="weui-dialog__bd">
            <!-- //打賞模板區-->
            <div class="ws__popup-template">
                <h2 class="hdTit">為喜歡的節目打賞</h2>
                <div class="item flexbox"
 
>
                    <input class="ipt-txt align-l flex1" type="text" name="dschooseProgram" placeholder="選擇打賞節目" readonly />
                </div>
                <div class="item item-area">
                    <textarea class="describe" name="content" placeholder="輸入打賞語，30字以內（選填）"
 
></textarea>
                </div>
                <div class="item item-gift" id="J__chooseGift">
                    <div class="gift flexbox selected" data-gift="001">
                        <label class="txt"><span>豪車</span><em class="time">霸屏50秒</em></label>
                        <span class="amount">￥<em>12</em> <i class="chkbox"></i></span>
                    </div>
                    <div class="gift flexbox" data-gift="002">
                        <label class="txt"><span>動人玫瑰</span><em class="time">霸屏20秒</em></label>
                        <span class="amount">￥<em>8</em> <i class="chkbox"></i></span>
                    </div>
                </div>
            </div>
        </div>
        <div class="weui-dialog__ft">
            <a href="javascript:;" class="weui-dialog__btn weui-dialog__btn_primary" style="background: #ff4400; border-radius: 4px; color: #fff;">支付 <span>￥<em class="moneyNum">12</em></span> 打賞</a>
        </div>
    </div>
</div>
<!--END 打賞-->

Javascript代碼片段：

/* ——聊天編輯器區域 */
var $editor = $(".J__editorText"), editor = $editor[0];
var $face = $(".emotion-area dd img");
$face.on("click", function(e){
    if($(this).hasClass("face")){ //圖像
        var img = $(this)[0].cloneNode(true);
        
        editor.focus();
        setTimeout(function(){
            var range, node;
            if(document.selection && document.selection.createRange){
                document.selection.createRange().pasteHTML(img);
            }else if(window.getSelection && window.getSelection().getRangeAt){
                range = window.getSelection().getRangeAt(0);
                range.insertNode(img);
                range.collapse(false);
                
                var sel = window.getSelection();
                sel.removeAllRanges();
                sel.addRange(range);
            }
        }, 16);
    }else if($(this).hasClass("del")){ //刪除
        editor.focus();
        
        range = window.getSelection().getRangeAt(0);
        range.collapse(false);
        
        var sel = window.getSelection();
        sel.removeAllRanges();
        sel.addRange(range);
        document.execCommand("delete");
    }
});

//...格式化編輯器包含標簽
editor.addEventListener("focus", function(evt) {
    surrounds()
}, true);
editor.addEventListener("input", function(evt) {
    surrounds();
}, false);
function surrounds() {
    setTimeout(function () { //chrome
        var sel = window.getSelection();
        var anchorNode = sel.anchorNode;
        if (!anchorNode) return;
        if (sel.anchorNode === editor ||
            (sel.anchorNode.nodeType === 3 && sel.anchorNode.parentNode === editor)) {
            
            var range = sel.getRangeAt(0);
            var p = document.createElement("p");
            range.surroundContents(p);
            range.selectNodeContents(p);
            range.insertNode(document.createElement("br")); //chrome
            sel.collapse(p, 0);
            
            (function clearBr() {
                var elems = [].slice.call(editor.children);
                for (var i = 0, len = elems.length; i < len; i++) {
                    var el = elems[i];
                    if (el.tagName.toLowerCase() == "br") {
                        editor.removeChild(el);
                    }
                }
                elems.length = 0;
            })();
        }
    }, 0);
}

//...滾動到聊天內容底部
function scrollToBottom(){
    $(‘.ws__chatMsg-panel‘).animate({scrollTop: $("#J__chatMsgList").height()}, 300);
}

運行效果：

HTML5仿微信聊天界面、微信朋友圈實例