HTML5仿微信聊天界面和朋友圈代码

/* ――聊天编辑器区域 */

var $editor = $(".J__editorText"), editor = $editor[0];

var $face = $(".emotion-area dd img");

$face.on("click", function(e){

    if($(this).hasClass("face")){ //图像

        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")){ //删除

        editor.focus();

        range = window.getSelection().getRangeAt(0);

        range.collapse(false);

        var sel = window.getSelection();

        sel.removeAllRanges();

        sel.addRange(range);

        document.execCommand("delete");

    }

});

//...格式化编辑器包含标签

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);

}

//...滚动到聊天内容底部

function scrollToBottom(){

    $('.ws__chatMsg-panel').animate({scrollTop: $("#J__chatMsgList").height()}, 300);

}