UM.getEditor("addPowersToDocument").setContent("");

setContent(UM.getEditor('addPowersToDocument').execCommand( "getlocaldata" ));（用於把內容替換為草稿）

UM.getEditor('addPowersToDocument').setContent(isAppendTo);（用於儲存文字內容）

Html配置：function getLocalData () {
        /*    alert(UE.getEditor('addPowersToDocument').execCommand( "getlocaldata" ));
 
*/
        um.setContent(UM.getEditor('addPowersToDocument').execCommand( "getlocaldata" ));
}

<!--um style給定寬度可以影響編輯器的最終寬度-->
<div class="layui-form-item" id="addPowersToDocumentPage" style="display:none;">
    <form class="layui-form layui-form-pane" action="" lay-filter="addPowersToDocumentForm"
 

          id="addPowersToDocumentForm">
        <input type="hidden" name="documentId"/>
        <div type="text/plain" id="addPowersToDocument" name="content" style="width:1000px;height:240px;">
        </div>
        <div class="layui-form-item">
            <button type="button"
 
 id="addPowersToDocumentSubmit" lay-filter="addPowersToDocumentSubmit"
                    style="display:none" lay-submit></button>
        </div>
    </form>
    <div>
        <button onclick="getLocalData()" >獲取草稿箱內容</button>
    </div>
</div>