wxml代码：<canvas type="2d" id="myCanvas"></canvas> js代码：const query = uni.createSelectorQuery() query.select('#myCanvas')    .fields({ node: true })    .exec((res) => {       console.log('res', res)       const canvas = res[0].node    }) 通过createSelectorQueryAPI在开发者工具可正常获取canvas的node，在mac上面返回null是什么原因呢？手机也可以正常获取。 [图片] [图片]

- 当前 Bug 的表现（可附上截图） 自动预览 [图片] [图片] [图片] [图片] [图片] 多次错误编译后，居然通过了。 [图片] 自动上传也是如此，自动上传需要clear所有文件后，重新生成，所以一直没过，是否编译时有缓存，并发之类的，导制通过不了？ IDE server has started, listening on http://127.0.0.1:50551 initialization finished uploading project... { i [StatusCodeError]: 400 - "{\"code\":40000,\"error\":\"错误 Error: file: lib/storage/word-storage.js\\n unknown: Cannot read property 'contexts' of null\\n \"}"     at new i (/Applications/wechatwebdevtools.app/Contents/Resources/package.nw/js/common/cli/index.js:157:46301)     at H.callback (/Applications/wechatwebdevtools.app/Contents/Resources/package.nw/js/common/cli/index.js:157:45150)     at H.e.callback.a.callback [as _callback] (/Applications/wechatwebdevtools.app/Contents/Resources/package.nw/js/common/cli/index.js:157:44204)     at H.a._callback.a.callback.a.callback (/Applications/wechatwebdevtools.app/Contents/Resources/package.nw/js/common/cli/index.js:187:5473)     at H.emit (events.js:193:13)     at H.<anonymous> (/Applications/wechatwebdevtools.app/Contents/Resources/package.nw/js/common/cli/index.js:187:18286)     at H.emit (events.js:193:13)     at IncomingMessage.<anonymous> (/Applications/wechatwebdevtools.app/Contents/Resources/package.nw/js/common/cli/index.js:187:17128)     at Object.onceWrapper (events.js:281:20)     at IncomingMessage.emit (events.js:198:15)   name: 'StatusCodeError',   statusCode: 400,   message:    `400 - "{\\"code\\":40000,\\"error\\":\\"错误 Error: file: lib/storage/word-storage.js\\\\n unknown: Cannot read property 'contexts' of null\\\\n \\"}"`,   error:    `{"code":40000,"error":"错误 Error: file: lib/storage/word-storage.js\\n unknown: Cannot read property 'contexts' of null\\n "}`,   options:    { url:       'http://127.0.0.1:50551/upload?cli=1&projectpath=%252FUsers%252Fabc%252FPycharmProjects%252Fstudy-app%252Fstudy-project%252Fmini-app%252Fversions%252F..%252Fmini-program%252Fwx7b4db1bd999d314f&version=1.0.544&desc=upload%253A&infooutput=',      resolveWithFullResponse: true,      callback: [Function],      transform: undefined,      simple: true,      transform2xxOnly: false },   response:    IncomingMessage {      _readableState:       ReadableState {         objectMode: false,         highWaterMark: 16384,         buffer: BufferList { head: null, tail: null, length: 0 },         length: 0,         pipes: null,         pipesCount: 0,         flowing: true,         ended: true,         endEmitted: true,         reading: false,         sync: true,         needReadable: false,         emittedReadable: false,         readableListening: false,         resumeScheduled: false,         paused: false,         emitClose: true,         autoDestroy: false,         destroyed: false,         defaultEncoding: 'utf8',         awaitDrain: 0,         readingMore: true,         decoder: null,         encoding: null },      readable: false,      _events:       [Object: null prototype] {         end: [Array],         close: [Array],         data: [Function],         error: [Function] },      _eventsCount: 4,      _maxListeners: undefined,      socket:       Socket {         connecting: false,         _hadError: false,         _parent: null,         _host: null,         _readableState: [ReadableState],         readable: true,         _events: [Object],         _eventsCount: 7,         _maxListeners: undefined,         _writableState: [WritableState],         writable: false,         allowHalfOpen: false,         _sockname: null,         _pendingData: null,         _pendingEncoding: '',         server: null,         _server: null,         parser: null,         _httpMessage: [ClientRequest],         [Symbol(asyncId)]: 36,         [Symbol(kHandle)]: [TCP],         [Symbol(lastWriteQueueSize)]: 0,         [Symbol(timeout)]: null,         [Symbol(kBytesRead)]: 0,         [Symbol(kBytesWritten)]: 0 },      connection:       Socket {         connecting: false,         _hadError: false,         _parent: null,         _host: null,         _readableState: [ReadableState],         readable: true,         _events: [Object],         _eventsCount: 7,         _maxListeners: undefined,         _writableState: [WritableState],         writable: false,         allowHalfOpen: false,         _sockname: null,         _pendingData: null,         _pendingEncoding: '',         server: null,         _server: null,         parser: null,         _httpMessage: [ClientRequest],         [Symbol(asyncId)]: 36,         [Symbol(kHandle)]: [TCP],         [Symbol(lastWriteQueueSize)]: 0,         [Symbol(timeout)]: null,         [Symbol(kBytesRead)]: 0,         [Symbol(kBytesWritten)]: 0 },      httpVersionMajor: 1,      httpVersionMinor: 1,      httpVersion: '1.1',      complete: true,      headers:       { 'content-type': 'application/json;  charset=utf-8',         date: 'Thu, 09 May 2019 02:21:01 GMT',         connection: 'close',         'transfer-encoding': 'chunked' },      rawHeaders:       [ 'Content-Type',         'application/json;  charset=utf-8',         'Date',         'Thu, 09 May 2019 02:21:01 GMT',         'Connection',         'close',         'Transfer-Encoding',         'chunked' ],      trailers: {},      rawTrailers: [],      aborted: false,      upgrade: false,      url: '',      method: null,      statusCode: 400,      statusMessage: 'Bad Request',      client:       Socket {         connecting: false,         _hadError: false,         _parent: null,         _host: null,         _readableState: [ReadableState],         readable: true,         _events: [Object],         _eventsCount: 7,         _maxListeners: undefined,         _writableState: [WritableState],         writable: false,         allowHalfOpen: false,         _sockname: null,         _pendingData: null,         _pendingEncoding: '',         server: null,         _server: null,         parser: null,         _httpMessage: [ClientRequest],         [Symbol(asyncId)]: 36,         [Symbol(kHandle)]: [TCP],         [Symbol(lastWriteQueueSize)]: 0,         [Symbol(timeout)]: null,         [Symbol(kBytesRead)]: 0,         [Symbol(kBytesWritten)]: 0 },      _consuming: false,      _dumped: false,      req:       ClientRequest {         _events: [Object],         _eventsCount: 5,         _maxListeners: undefined,         outputData: [],         outputSize: 0,         writable: true,         _last: true,         chunkedEncoding: false,         shouldKeepAlive: false,         useChunkedEncodingByDefault: false,         sendDate: false,         _removedConnection: false,         _removedContLen: false,         _removedTE: false,         _contentLength: 0,         _hasBody: true,         _trailer: '',         finished: true,         _headerSent: true,         socket: [Socket],         connection: [Socket],         _header:          'GET /upload?cli=1&projectpath=%252FUsers%252Fabc%252FPycharmProjects%252Fstudy-app%252Fstudy-project%252Fmini-app%252Fversions%252F..%252Fmini-program%252Fwx7b4db1bd999d314f&version=1.0.544&desc=upload%253A&infooutput= HTTP/1.1\r\nhost: 127.0.0.1:50551\r\nConnection: close\r\n\r\n',         _onPendingData: [Function: noopPendingOutput],         agent: [Agent],         socketPath: undefined,         timeout: undefined,         method: 'GET',         path:          '/upload?cli=1&projectpath=%252FUsers%252Fabc%252FPycharmProjects%252Fstudy-app%252Fstudy-project%252Fmini-app%252Fversions%252F..%252Fmini-program%252Fwx7b4db1bd999d314f&version=1.0.544&desc=upload%253A&infooutput=',         _ended: true,         res: [Circular],         aborted: false,         timeoutCb: null,         upgradeOrConnect: false,         parser: null,         maxHeadersCount: null,         [Symbol(isCorked)]: false,         [Symbol(outHeadersKey)]: [Object] },      request:       H {         _events: [Object],         _eventsCount: 5,         _maxListeners: undefined,         resolveWithFullResponse: true,         readable: true,         writable: true,         _qs: [r],         _auth: [c],         _oauth: [u],         _multipart: [s],         _redirect: [r],         _tunnel: [s],         _rp_resolve: [Function],         _rp_reject: [Function],         _rp_promise: [Promise],         _rp_callbackOrig: undefined,         callback: [Function],         _rp_options: [Object],         headers: {},         setHeader: [Function],         hasHeader: [Function],         getHeader: [Function],         removeHeader: [Function],         method: 'GET',         localAddress: undefined,         pool: {},         dests: [],         __isRequestRequest: true,         _callback: [Function],         uri: [Url],         proxy: null,         tunnel: false,         setHost: true,         originalCookieHeader: undefined,         _disableCookies: true,         _jar: undefined,         port: '50551',         host: '127.0.0.1',         path:          '/upload?cli=1&projectpath=%252FUsers%252Fabc%252FPycharmProjects%252Fstudy-app%252Fstudy-project%252Fmini-app%252Fversions%252F..%252Fmini-program%252Fwx7b4db1bd999d314f&version=1.0.544&desc=upload%253A&infooutput=',         httpModule: [Object],         agentClass: [Function],         agent: [Agent],         _started: true,         href:          'http://127.0.0.1:50551/upload?cli=1&projectpath=%252FUsers%252Fabc%252FPycharmProjects%252Fstudy-app%252Fstudy-project%252Fmini-app%252Fversions%252F..%252Fmini-program%252Fwx7b4db1bd999d314f&version=1.0.544&desc=upload%253A&infooutput=',         req: [ClientRequest],         ntick: true,         response: [Circular],         originalHost: '127.0.0.1:50551',         originalHostHeaderName: 'host',         responseContent: [Circular],         _destdata: true,         _ended: true,         _callbackCalled: true },      toJSON: [Function: L],      caseless: t { dict: [Object] },      body:       `{"code":40000,"error":"错误 Error: file: lib/storage/word-storage.js\\n unknown: Cannot read property 'contexts' of null\\n "}` } } - 预期表现 一次性编译预览通过，但总是不通过，然后多进行几次又莫名通过，在IDE中直接点击预览、上传均出现同样问题。 - 复现路径 - 提供一个最简复现 Demo

- 调用此接口通过canvas生成保存到手机相册的图片不如以前的清晰 - js代码 [代码]onLoad: [代码][代码]function[代码][代码](options) {[代码][代码]   [代码][代码]var[代码] [代码]ctx = wx.createCanvasContext([代码][代码]"canvas"[代码][代码], [代码][代码]this[代码][代码])[代码][代码]   [代码][代码]wx.chooseImage({[代码][代码]     [代码][代码]success: [代码][代码]function[代码][代码](res) {[代码][代码]       [代码][代码]console.log(res)[代码][代码]       [代码][代码]var[代码] [代码]path = res.tempFilePaths[[代码][代码]0[代码][代码]][代码][代码]       [代码][代码]ctx.drawImage(path, [代码][代码]0[代码][代码], [代码][代码]0[代码][代码], [代码][代码]375[代码][代码], [代码][代码]667[代码][代码])[代码][代码]       [代码][代码]ctx.draw([代码][代码]true[代码][代码], [代码][代码]function[代码][代码](res) {[代码][代码]         [代码][代码]wx.canvasToTempFilePath({[代码][代码]           [代码][代码]canvasId: [代码][代码]'canvas'[代码][代码],[代码][代码]           [代码][代码]width:[代码][代码]375[代码][代码],[代码][代码]           [代码][代码]height:[代码][代码]667[代码][代码],[代码][代码]           [代码][代码]destWidth: [代码][代码]375[代码][代码]*[代码][代码]4[代码][代码],[代码][代码]           [代码][代码]destHeight: [代码][代码]667[代码][代码]*[代码][代码]4[代码][代码],[代码][代码]           [代码][代码]success(res) {[代码][代码]             [代码][代码]console.log(res.tempFilePath)[代码][代码]             [代码][代码]wx.saveImageToPhotosAlbum({[代码][代码]               [代码][代码]filePath: res.tempFilePath,[代码][代码]               [代码][代码]success(res) {[代码][代码]                 [代码][代码]console.log(res)[代码][代码]                 [代码][代码]wx.showToast({[代码][代码]                   [代码][代码]title: [代码][代码]'保存成功'[代码][代码],[代码][代码]                 [代码][代码]})[代码][代码]                 [代码][代码]wx.vibrateLong({})[代码][代码]               [代码][代码]}[代码][代码]             [代码][代码]})[代码][代码]           [代码][代码]}[代码][代码]         [代码][代码]})[代码][代码]       [代码][代码]})[代码][代码]     [代码][代码]}[代码][代码]   [代码][代码]})[代码][代码] [代码][代码]}[代码] -wxml代码 [代码]<[代码][代码]canvas[代码] [代码]style[代码][代码]=[代码][代码]'width:375px;height:667px;'[代码] [代码]canvas-id[代码][代码]=[代码][代码]"canvas"[代码][代码]></[代码][代码]canvas[代码][代码]>[代码] 图片可能在电脑上区别不明显，但是在手机上一眼就能看出来 -原图： [图片] -生成的图片 [图片]

订单金额如果是0.01元的时候，就流程正常，调起支付弹窗，支付成功。    可是如果订单金额是0.00元的时候，有订单号，但是，支付弹窗就不弹出来了，也没报错，是微信支付不支持0元支付吗？还是别的？ 求解答。

大家是这样吗？

这是我数据库记录的，pay_time是回调时微信给我的用户支付时间，notify_time是我在回调接口里获取的当前时间，发现最少相差了10s，最长20秒。 [图片] [图片] 我前端页面展示有两个TAB页（待支付、已支付），在待支付付完钱后刷新当前页面，就会出现可能会没触发回调接口，导致订单还在待支付TAB页里。 [图片] 支付成功后，我已经延迟10秒刷新页面了，但是我怕这个延迟时间不够。 如果延迟20秒会极大的影响用户体验。 我想问微信那边为什么会这么慢，貌似是这两天会这样，以前支付成功不超过2s直接会调回调接口的

我的小程序上线了，因电脑系统崩溃，小程序代码丢失了，请问怎么才能找回小程序的代码

微信小程序发布成功之后。 用户有没有可能通过一些特殊的处理方式，来获取到当前微信小程序的源码？ 对于这种类似的问题，腾讯官方技术方面，有没有做什么相应的应对措施？ 由于一直没有找到，微信小程序的官方技术支持的人工联系方式。所以在这里把问题发布出来，希望各位做技术的同仁、以及小程序的官方技术人员，能够帮忙。 谢谢！

小程序 是否写入storage的数据，任意用户登录同一手机的微信，都是共享的，可以读写的？