return new Promise 使用递归，最后没有返回值?

spring 2021-12-21 3490 浏览问题模块： API和组件

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<div style="text-align:center;margin-top:20px;"><button class="btn btn-primary">确定</button><button class="btn btn-default" style="margin-left:20px;">取消</button></div></div></div></div></div></div></div></div><div class="anwser__area"><div class="answer_container"><div class="anwser__hd"><p class="anwser__title">2 个回答</p></div><div id="comment-list" class=" anwsers__list"><div class="answer_container"><div class="post_comment_area"><ul class="post_comment_list"><li itemprop="answer" itemscope="itemscope" itemtype="http://schema.org/Answer" id="000a6c7c074ea098bc3d07f10560" class="widget_comment js_post_comment_item post_comment_item "><meta check-reduce="" itemprop="image"/><meta check-reduce="" itemprop="upvoteCount" content="1"/><meta check-reduce="" itemprop="url" content="https://developers.weixin.qq.com/community/develop/doc/00082605a58b40a8a93dcedca51400?jumpto=comment&commentid=000a6c7c074ea098bc3d07f10560"/><meta check-reduce="" itemprop="dateCreated" content="Wed Dec 22 2021 17:29:02 GMT+0800 (China Standard Time)"/><meta check-reduce="" itemprop="dateModified" content="Wed Dec 22 2021 17:29:02 GMT+0800 (China Standard Time)"/><meta check-reduce="" itemprop="commentCount" content="2"/><a href="/community/personal/sq_oDyAl0UqoY02pZk1KnjWo2krCpsw" target="_blank" class="post_comment_owner"><span class="popover__box popover_appreciate popover__box_hide" data-v-0a980b96=""><span class="popover_target"><div class="post_comment_owner_avatar"><img src="https://mmbiz.qpic.cn/sz_mmbiz_png/ZvOjXQZZtt1JG2rDaBIgasDrukyOUk3QSqTydyaeDCt07zgCNHsiaV2Dl651CC0b2iaKkqaJpuEu1sOfqQr24SWA/0" alt="微盟" class="post_comment_owner_avatar_image"/></div><strong data-component-identifier="replybox__nick_name" class="post_comment_owner_nickname">微盟</strong></span></span></a><div class="checking_state_new"><span title="企业用户" class="cy_new"/><span class="ic_contributer"/></div><span class="post_comment_pos"><span check-reduce="" class="post_comment_time">2021-12-22</span></span><div check-reduce="" class="post_comment_editor_area comment_editor_box" style=";"><div class="post_comment_content post_editor_box"><div class="mode__rich-text-editor mode__rich-text-editor__normal"><div class="mode__rich-text-editor__header mode__rich-text-editor__header__normal"><div class="mode__rich-text-editor__header__extend"/><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__bold"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__bold ql-bold"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>加粗</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__red"><button value="red" class="mode__rich-text-editor__icon mode__rich-text-editor__icon__red ql-red"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>标红</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__ql-code-block"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__code-block ql-code-block"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>插入代码</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__ql-link"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__link ql-link"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>插入链接</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__ql-image"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__image ql-image"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>插入图片</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__ql-video"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__video ql-video"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>上传视频</p></span></div></div><div class="mode__rich-text-editor__body" style=";"/><div class="mode__rich-text-editor__body" style="display:;"><div> 请 <a>登录</a> 后发表内容 </div></div><div class="dialog_wrapper dialog_with_head" style=";"><div class="dialog_wrp_new dialog_component" style="width:600px;"><div class="dialog"><a href="javascript:;" class="icon16_opr closed pop_closed">关闭</a><div class="dialog_hd"><h3>新增或编辑超链接</h3></div><div class="dialog_bd"><div class="frm_control_group"><label for="" class="frm_label">链接地址</label><div class="frm_controls"><span class="frm_input_box"><input type="text" value="https://" class="frm_input"/></span></div></div></div><div class="dialog_ft"><a href="javascript:;" class="btn btn_info">确认</a><a href="javascript:;" class="btn btn_default">取消</a></div></div></div></div><div class="dialog_wrapper dialog__insert-video dialog_with_head" style=";"><div class="dialog_wrp_new dialog_component" style="width:600px;"><div class="dialog"><a href="javascript:;" class="icon16_opr closed pop_closed">关闭</a><div class="dialog_hd"><h3>插入视频</h3></div><div class="dialog_bd"><div class="frm_control_group"><label for="" class="frm_label">视频链接</label><div class="frm_controls"><span class="frm_input_box"><input type="text" placeholder="仅支持插入腾讯视频" value="" class="frm_input"/></span></div></div></div><div class="dialog_ft"><a href="javascript:;" class="btn btn_info">确认</a><a href="javascript:;" class="btn btn_default">取消</a></div></div></div></div></div><div class="tool_bar tr"><a href="javascript:;" class="btn btn_primary edui-default">发表</a></div></div></div><div class="post_comment_content_container"><div itemprop="text" class="post_comment_content expanded" style="display:;"><p>你好，这代码并没有做到递归，且只有满足resolve判断条件的getBuilds函数Promise实例状态为fulfilled。其他Promise实例的状态均为pending (包含getTag中的)。</p><p>这里有个示例供你参考下：</p><pre class="ql-syntax" spellcheck="false"> <span class="hljs-keyword">let</span> i = <span class="hljs-number">1</span>; <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">request</span>() </span>{ <span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> { setTimeout(<span class="hljs-function"><span class="hljs-params">()</span> =></span> { i += <span class="hljs-number">1</span>; resolve(i); }, <span class="hljs-number">1000</span>); <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">recursionFetch</span>() </span>{ <span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> <span class="hljs-built_in">Promise</span>(<span class="hljs-function">(<span class="hljs-params">resolve, reject</span>) =></span> { request() .then(<span class="hljs-function">(<span class="hljs-params">res</span>) =></span> { <span class="hljs-comment">// 满足条件</span> <span class="hljs-keyword">if</span> (res === <span class="hljs-number">10</span>) { <span class="hljs-keyword">return</span> resolve({ <span class="hljs-attr">done</span>: <span class="hljs-literal">true</span>, <span class="hljs-attr">value</span>: res }); } <span class="hljs-keyword">else</span> { <span class="hljs-comment">// 不满足条件</span> <span class="hljs-keyword">return</span> resolve({ <span class="hljs-attr">done</span>: <span class="hljs-literal">false</span>, <span class="hljs-attr">value</span>: res }); .catch(<span class="hljs-function">(<span class="hljs-params">err</span>) =></span> { reject(err); .then(<span class="hljs-function">(<span class="hljs-params">res</span>) =></span> { <span class="hljs-comment">// 满足条件，返回</span> <span class="hljs-keyword">if</span> (res.done) { <span class="hljs-keyword">return</span> <span class="hljs-built_in">Promise</span>.resolve(res.value); } <span class="hljs-keyword">else</span> { <span class="hljs-comment">// 不满足条件，进入递归</span> <span class="hljs-keyword">return</span> recursionFetch(); .catch(<span class="hljs-function">(<span class="hljs-params">err</span>) =></span> { <span class="hljs-keyword">return</span> <span class="hljs-built_in">Promise</span>.reject(err); <span class="hljs-keyword">var</span> p1 = recursionFetch(); p1.then(<span class="hljs-function">(<span class="hljs-params">res</span>) =></span> { <span class="hljs-built_in">console</span>.log(<span class="hljs-string">"res::"</span>, res); }).catch(<span class="hljs-function">(<span class="hljs-params">err</span>) =></span> <span class="hljs-built_in">console</span>.log(<span class="hljs-string">"err:"</span>, err)); </pre></div></div><div itemprop="text" class="post_comment_content" style=";"><p>你好，麻烦通过点击下方“反馈信息”按钮，提供出现问题的。</p><a href="javascript:;" disabled="disabled" class="btn btn_default" style="margin: 12px 0; color: #999">待楼主反馈</a></div><div class="post_comment_info" style="display:;"><div class="mobile_post_comment_info_hd"><div class="mobile_post_comment_time">2021-12-22</div></div><div class="post_comment_opr"><div data-component-identifier="comment-like" class="best_comment_agree click "><div class="comment_topic_agree"><i class="icon_post_opr icon_topic_unagree"/>有用 <span>1</span></div></div><div class="best_comment_unagree"><div class="comment_topic_agree"><i class="icon_post_opr icon_topic_unagree"/></div></div><div class="js_comment best_comment_discuss"><i class="icon_post_opr discuss"/><span check-reduce="" class="post_opr_wording">回复 <span class="best_comment_num">2</span></span></div></div></div><div class="post_comment_reply_area part3"><div class="post_comment_area"><ul class="post_comment_list" style="display:;"><li itemprop="comment" itemscope="itemscope" itemtype="http://schema.org/Comment" id="0008289fef4d3079b53d07f1556c" class="widget_comment js_post_comment_item post_comment_item "><meta check-reduce="" itemprop="image"/><meta check-reduce="" itemprop="upvoteCount" content="0"/><meta check-reduce="" itemprop="url" content="https://developers.weixin.qq.com/community/develop/doc/00082605a58b40a8a93dcedca51400?jumpto=comment&commentid=0008289fef4d3079b53d07f1556c"/><meta check-reduce="" itemprop="dateCreated" content="Wed Dec 22 2021 18:13:06 GMT+0800 (China Standard Time)"/><meta check-reduce="" itemprop="dateModified" content="Wed Dec 22 2021 18:13:06 GMT+0800 (China Standard Time)"/><meta check-reduce="" itemprop="commentCount" content="0"/><a href="/community/personal/oCJUsw0O8vcWiCUNNmbZGk-nx5_s" target="_blank" class="post_comment_owner"><span class="popover__box popover_appreciate popover__box_hide" data-v-0a980b96=""><span class="popover_target"><div class="post_comment_owner_avatar"><img src="https://wx.qlogo.cn/mmhead/574VdhMFwaFWPn6bfDdMSDSGzRwYSmn4Z6eMv0QyyZPLzUA3brVHfyiaorF1zia5yYLjiaxTONQ58E/0" alt="spring" class="post_comment_owner_avatar_image"/></div><strong data-component-identifier="replybox__nick_name" class="post_comment_owner_nickname">spring</strong></span></span></a><div class="checking_state_new"><span title="楼主" class="lz_new"/><i check-reduce="" class="from__mobile">发表于移动端</i></div><span class="post_comment_pos"><span check-reduce="" class="post_comment_time">2021-12-22</span></span><div check-reduce="" class="post_comment_editor_area comment_editor_box" style=";"><div class="post_comment_content post_editor_box"><div class="mode__rich-text-editor mode__rich-text-editor__normal"><div class="mode__rich-text-editor__header mode__rich-text-editor__header__normal"><div class="mode__rich-text-editor__header__extend"/><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__bold"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__bold ql-bold"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>加粗</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__red"><button value="red" class="mode__rich-text-editor__icon mode__rich-text-editor__icon__red ql-red"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>标红</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__ql-code-block"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__code-block ql-code-block"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>插入代码</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__ql-link"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__link ql-link"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>插入链接</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__ql-image"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__image ql-image"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>插入图片</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__ql-video"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__video ql-video"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>上传视频</p></span></div></div><div class="mode__rich-text-editor__body" style=";"/><div class="mode__rich-text-editor__body" style="display:;"><div> 请 <a>登录</a> 后发表内容 </div></div><div class="dialog_wrapper dialog_with_head" style=";"><div class="dialog_wrp_new dialog_component" style="width:600px;"><div class="dialog"><a href="javascript:;" class="icon16_opr closed pop_closed">关闭</a><div class="dialog_hd"><h3>新增或编辑超链接</h3></div><div class="dialog_bd"><div class="frm_control_group"><label for="" class="frm_label">链接地址</label><div class="frm_controls"><span class="frm_input_box"><input type="text" value="https://" class="frm_input"/></span></div></div></div><div class="dialog_ft"><a href="javascript:;" class="btn btn_info">确认</a><a href="javascript:;" class="btn btn_default">取消</a></div></div></div></div><div class="dialog_wrapper dialog__insert-video dialog_with_head" style=";"><div class="dialog_wrp_new dialog_component" style="width:600px;"><div class="dialog"><a href="javascript:;" class="icon16_opr closed pop_closed">关闭</a><div class="dialog_hd"><h3>插入视频</h3></div><div class="dialog_bd"><div class="frm_control_group"><label for="" class="frm_label">视频链接</label><div class="frm_controls"><span class="frm_input_box"><input type="text" placeholder="仅支持插入腾讯视频" value="" class="frm_input"/></span></div></div></div><div class="dialog_ft"><a href="javascript:;" class="btn btn_info">确认</a><a href="javascript:;" class="btn btn_default">取消</a></div></div></div></div></div><div class="tool_bar tr"><a href="javascript:;" class="btn btn_primary edui-default">发表</a></div></div></div><div class="post_comment_content_container"><div itemprop="text" class="post_comment_content expanded" style="display:;">我昨晚已经弄出来了，第二次调用getBuilds的时候他又重新new了一个promise，和第一个promise不是同一个，所以第一个一直在pendding中，谢谢</div></div><div itemprop="text" class="post_comment_content" style=";"><p>你好，麻烦通过点击下方“反馈信息”按钮，提供出现问题的。</p><a href="javascript:;" disabled="disabled" class="btn btn_default" style="margin: 12px 0; color: #999">待楼主反馈</a></div><div class="cm-s-default CodeMirror-wrap"></div><div class="post_comment_info" style="display:;"><div class="mobile_post_comment_info_hd"><div class="mobile_post_comment_time">2021-12-22</div></div><div class="post_comment_opr"><div data-component-identifier="comment-like" class="best_comment_agree click "><i class="icon_post_opr icon_agree"/><span check-reduce="" class="post_opr_wording">赞 </span></div><div class="js_comment post_opr_meta post_opr_meta_comment_reply"><i class="icon_post_opr discuss"/><span check-reduce="" class="post_opr_wording">回复</span></div></div></div><div check-reduce="" class="dialog_wrapper page_mode_dialog_complain dialog_with_head" style=";"><div class="dialog_wrp_new dialog_component"><div class="dialog"><a href="javascript:;" class="icon16_opr closed pop_closed">关闭</a><div class="dialog_hd"><h3>请选择投诉理由</h3></div><div class="dialog_bd"><div class="dialog_complain_list"><div class="mod_access"><ul class="access_list"><li class="access_list_item access_list_item_hasMore"><div class="access_list_item_head">广告内容</div></li><li class="access_list_item access_list_item_hasMore"><div class="access_list_item_head">违法违规</div></li><li class="access_list_item access_list_item_hasMore"><div class="access_list_item_head">恶意灌水内容</div></li><li class="access_list_item access_list_item_hasMore"><div class="access_list_item_head">其他</div></li></ul></div></div></div></div></div></div><div></div><div></div></li><li itemprop="comment" itemscope="itemscope" itemtype="http://schema.org/Comment" id="000a6eac818b4800ddbf1dcfd5b8" class="widget_comment js_post_comment_item post_comment_item with_reanswer"><meta check-reduce="" itemprop="image"/><meta check-reduce="" itemprop="upvoteCount" content="0"/><meta check-reduce="" itemprop="url" content="https://developers.weixin.qq.com/community/develop/doc/00082605a58b40a8a93dcedca51400?jumpto=comment&commentid=000a6eac818b4800ddbf1dcfd5b8"/><meta check-reduce="" itemprop="dateCreated" content="Tue May 16 2023 23:01:24 GMT+0800 (China Standard Time)"/><meta check-reduce="" itemprop="dateModified" content="Tue May 16 2023 23:01:24 GMT+0800 (China Standard Time)"/><meta check-reduce="" itemprop="commentCount" content="0"/><a href="/community/personal/oCJUsw-WhtbQsQhET_L9duCz1H3U" target="_blank" class="post_comment_owner"><span class="popover__box popover_appreciate popover__box_hide" data-v-0a980b96=""><span class="popover_target"><div class="post_comment_owner_avatar"><img src="https://wx.qlogo.cn/mmhead/Q3auHgzwzM7kNK1wl7ZhHNUiaz1YM5LNLmrJe1ynGH9Z07pKNrj4iaGQ/0" alt="N." class="post_comment_owner_avatar_image"/></div><strong data-component-identifier="replybox__nick_name" class="post_comment_owner_nickname">N.</strong></span></span></a><div class="checking_state_new"></div><span class="post_comment_pos"><span check-reduce="" class="post_comment_time">2023-05-16</span></span><span class="reply-comment"><span class="relpy-tips">回复</span><a href="/community/personal/oCJUsw0O8vcWiCUNNmbZGk-nx5_s" data-component-identifier="replybox__reply_nick_name" target="_blank" class="post_comment_owner_nickname">spring</a></span><div check-reduce="" class="post_comment_editor_area comment_editor_box" style=";"><div class="post_comment_content post_editor_box"><div class="mode__rich-text-editor mode__rich-text-editor__normal"><div class="mode__rich-text-editor__header mode__rich-text-editor__header__normal"><div class="mode__rich-text-editor__header__extend"/><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__bold"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__bold ql-bold"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>加粗</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__red"><button value="red" class="mode__rich-text-editor__icon mode__rich-text-editor__icon__red ql-red"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>标红</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__ql-code-block"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__code-block ql-code-block"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>插入代码</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__ql-link"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__link ql-link"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>插入链接</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__ql-image"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__image ql-image"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>插入图片</p></span></div><div class="weui-desktop-tooltip__wrp weui-desktop-tooltip__wrp__ql-video"><button class="mode__rich-text-editor__icon mode__rich-text-editor__icon__video ql-video"/><span class="weui-desktop-tooltip weui-desktop-tooltip__" style=";"><p>上传视频</p></span></div></div><div class="mode__rich-text-editor__body" style=";"/><div class="mode__rich-text-editor__body" style="display:;"><div> 请 <a>登录</a> 后发表内容 </div></div><div class="dialog_wrapper dialog_with_head" style=";"><div class="dialog_wrp_new dialog_component" style="width:600px;"><div class="dialog"><a href="javascript:;" class="icon16_opr closed pop_closed">关闭</a><div class="dialog_hd"><h3>新增或编辑超链接</h3></div><div class="dialog_bd"><div class="frm_control_group"><label for="" class="frm_label">链接地址</label><div class="frm_controls"><span class="frm_input_box"><input type="text" value="https://" class="frm_input"/></span></div></div></div><div class="dialog_ft"><a href="javascript:;" class="btn btn_info">确认</a><a href="javascript:;" class="btn btn_default">取消</a></div></div></div></div><div class="dialog_wrapper dialog__insert-video dialog_with_head" style=";"><div class="dialog_wrp_new dialog_component" style="width:600px;"><div class="dialog"><a href="javascript:;" class="icon16_opr closed pop_closed">关闭</a><div class="dialog_hd"><h3>插入视频</h3></div><div class="dialog_bd"><div class="frm_control_group"><label for="" class="frm_label">视频链接</label><div class="frm_controls"><span class="frm_input_box"><input type="text" placeholder="仅支持插入腾讯视频" value="" class="frm_input"/></span></div></div></div><div class="dialog_ft"><a href="javascript:;" class="btn btn_info">确认</a><a href="javascript:;" class="btn btn_default">取消</a></div></div></div></div></div><div class="tool_bar tr"><a href="javascript:;" class="btn btn_primary edui-default">发表</a></div></div></div><div class="post_comment_content_container"><div itemprop="text" class="post_comment_content 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return new Promise 使用递归，最后没有返回值?