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<div class="us_textArea js_text js_textarea" contenteditable="true" onpaste="return pasteListener(event, true)"></div>

//文本域粘贴图片
function pasteListener(event, isLimit) {
    $.each(event.clipboardData.items, function(index, item) {
        if(item.kind == "file" && item.type.match("image/*")) {
            var file = item.getAsFile();
            if(isLimit && file.size > 2 * 1024 * 1024) {
                // parent.index.layers("msg", "粘贴的图片内容过大，最大支持为2M。");
                /*弱提示*/
                layui.use('layer', function(){
                    var layer = layui.layer;
                    layer.msg('粘贴的图片内容过大，最大支持为2M。',{
                        time : 3000,
                    });
                });
                return true;
            }
            var fileReader = new FileReader();
            fileReader.onload = function(event) {
                var img = "<img src='" + event.target.result + "' style='" + (isLimit ? "max-width:200px;" : "") + "'" + (isLimit ? "" : "") + ">";
                var selection = window.getSelection();
                var range = selection.getRangeAt(0);
                range.insertNode($(img)[0]);
                selection.anchorOffset = selection.focusOffset;
                selection.collapseToEnd();
            }
            fileReader.readAsDataURL(file);
        } else if(item.kind == "string" && item.type.match("text/plain")) {
            item.getAsString(function(str) {
                var selection = window.getSelection();
                var range = selection.getRangeAt(0);
                range.insertNode(new Text(str));
                selection.anchorOffset = selection.focusOffset;
                selection.collapseToEnd();
            });
        }
    });
    return false;
}