Description
I am following your blog to try out your full stack application. I have tried all different front end applications, but when I try to login or sign up, I always get this error
SyntaxError: Unexpected token < in JSON at position 0
Using Devtools in the browser, I can see that we are always failing in this line in the main.js:
/var r=Object.getOwnPropertySymbols,o=Object.prototype.hasOwnProperty,i=Object.prototype.propertyIsEnumerable;function a(e){if(null==e)throw new TypeError("Object.assign cannot be called with null or undefined");return Object(e)}e.exports=function(){try{if(!Object.assign)return!1;var e=new String("abc");if(e[5]="de","5"===Object.getOwnPropertyNames(e)[0])return!1;for(var t={},n=0;n<10;n++)t[""+String.fromCharCode(n)]=n;if("0123456789"!==Object.getOwnPropertyNames(t).map((function(e){return t[e]})).join(""))return!1;var r={};return"abcdefghijklmnopqrst".split("").forEach((function(e){r[e]=e})),"abcdefghijklmnopqrst"===Object.keys(Object.assign({},r)).join("")}catch(e){return!1}}()?Object.assign:function(e,t){for(var n,l,u=a(e),c=1;c<arguments.length;c++){for(var s in n=Object(arguments[c]))o.call(n,s)&&(u[s]=n[s]);if(r){l=r(n);for(var f=0;f<l.length;f++)i.call(n,l[f])&&(u[l[f]]=n[l[f]])}}return u}},function(e,t,n){"use strict";function r(e){var t,n=e.Symbol;return"function"==typeof n?n.observable?t=n.observable:(t=n("observable"),n.observable=t):t="@@observable",t}n.d(t,"a",(function(){return r}))},function(e,t,n){(function(e){!function(t){"use strict";function n(e,t){e.super=t,e.prototype=Object.create(t.prototype,{constructor:{value:e,enumerable:!1,writable:!0,configurable:!0}})}function r(e,t){Object.defineProperty(this,"kind",{value:e,enumerable:!0}),t&&t.length&&Object.defineProperty(this,"path",{value:t,enumerable:!0})}function o(e,t,n){o.super_.call(this,"E",e),Object.defineProperty(this,"lhs",{value:t,enumerable:!0}),Object.defineProperty(this,"rhs",{value:n,enumerable:!0})}function i(e,t){i.super_.call(this,"N",e),Object.defineProperty(this,"rhs",{value:t,enumerable:!0})}function a(e,t){a.super_.call(this,"D",e),Object.defineProperty(this,"lhs",{value:t,enumerable:!0})}function l(e,t,n){l.super_.call(this,"A",e),Object.defineProperty(this,"index",{value:t,enumerable:!0}),Object.defineProperty(this,"item",{value:n,enumerable:!0})}function u(e,t,n){var r=e.slice((n||t)+1||e.length);return e.length=t<0?e.length+t:t,e.push.apply(e,r),e}function c(e){var t=void 0===e?"undefined":k(e);return"object"!==t?t:e===Math?"math":null===e?"null":Array.isArray(e)?"array":"[object Date]"===Object.prototype.toString.call(e)?"date":"function"==typeof e.toString&&/^/.//.test(e.toString())?"regexp":"object"}function s(e,t,n,r,f,d,p){p=p||[];var h=(f=f||[]).slice(0);if(void 0!==d){if(r){if("function"==typeof r&&r(h,d))return;if("object"===(void 0===r?"undefined":k(r))){if(r.prefilter&&r.prefilter(h,d))return;if(r.normalize){var m=r.normalize(h,d,e,t);m&&(e=m[0],t=m[1])}}}h.push(d)}"regexp"===c(e)&&"regexp"===c(t)&&(e=e.toString(),t=t.toString());var v=void 0===e?"undefined":k(e),y=void 0===t?"undefined":k(t),g="undefined"!==v||p&&p[p.length-1].lhs&&p[p.length-1].lhs.hasOwnProperty(d),b="undefined"!==y||p&&p[p.length-1].rhs&&p[p.length-1].rhs.hasOwnProperty(d);if(!g&&b)n(new i(h,t));else if(!b&&g)n(new a(h,e));else if(c(e)!==c(t))n(new o(h,e,t));else if("date"===c(e)&&e-t!=0)n(new o(h,e,t));else if("object"===v&&null!==e&&null!==t)if(p.filter((function(t){return t.lhs===e})).length)e!==t&&n(new o(h,e,t));else{if(p.push({lhs:e,rhs:t}),Array.isArray(e)){var w;for(e.length,w=0;w<e.length;w++)w>=t.length?n(new l(h,w,new a(void 0,e[w]))):s(e[w],t[w],n,r,h,w,p);for(;w<t.length;)n(new l(h,w,new i(void 0,t[w++])))}else{var E=Object.keys(e),x=Object.keys(t);E.forEach((function(o,i){var a=x.indexOf(o);a>=0?(s(e[o],t[o],n,r,h,o,p),x=u(x,a)):s(e[o],void 0,n,r,h,o,p)})),x.forEach((function(e){s(void 0,t[e],n,r,h,e,p)}))}p.length=p.length-1}else e!==t&&("number"===v&&isNaN(e)&&isNaN(t)||n(new o(h,e,t)))}function f(e,t,n,r){return r=r||[],s(e,t,(function(e){e&&r.push(e)}),n),r.length?r:void 0}function d(e,t,n){if(e&&t&&n&&n.kind){for(var r=e,o=-1,i=n.path?n.path.length-1:0;++o<i;)void 0===r[n.path[o]]&&(r[n.path[o]]="number"==typeof n.path[o]?[]:{}),r=r[n.path[o]];switch(n.kind){case"A":!function e(t,n,r){if(r.path&&r.path.length){var o,i=t[n],a=r.path.length-1;for(o=0;o<a;o++)i=i[r.path[o]];switch(r.kind){case"A":e(i[r.path[o]],r.index,r.item);break;case"D":delete i[r.path[o]];break;case"E":case"N":i[r.path[o]]=r.rhs}}else switch(r.kind){case"A":e(t[n],r.index,r.item);break;case"D":t=u(t,n);break;case"E":case"N":t[n]=r.rhs}return t}(n.path?r[n.path[o]]:r,n.index,n.item);break;case"D":delete r[n.path[o]];break;case"E":case"N":r[n.path[o]]=n.rhs}}}function p(e){return"color: "+A[e].color+"; font-weight: bold"}function h(e,t,n,r){var o=f(e,t);try{r?n.groupCollapsed("diff"):n.group("diff")}catch(e){n.log("diff")}o?o.forEach((function(e){var t=e.kind,r=function(e){var t=e.kind,n=e.path,r=e.lhs,o=e.rhs,i=e.index,a=e.item;switch(t){case"E":return[n.join("."),r,"→",o];case"N":return[n.join("."),o];case"D":return[n.join(".")];case"A":return[n.join(".")+"["+i+"]",a];default:return[]}}(e);n.log.apply(n,["%c "+A[t].text,p(t)].concat(S(r)))})):n.log("—— no diff ——");try{n.groupEnd()}catch(e){n.log("—— diff end —— ")}}function m(e,t,n,r){switch(void 0===e?"undefined":k(e)){case"object":return"function"==typeof e[r]?e[r].apply(e,S(n)):e[r];case"function":return e(t);default:return e}}function v(e,t){var n=t.logger,r=t.actionTransformer,o=t.titleFormatter,i=void 0===o?function(e){var t=e.timestamp,n=e.duration;return function(e,r,o){var i=["action"];return i.push("%c"+String(e.type)),t&&i.push("%c@ "+r),n&&i.push("%c(in "+o.toFixed(2)+" ms)"),i.join(" ")}}(t):o,a=t.collapsed,l=t.colors,u=t.level,c=t.diff,s=void 0===t.titleFormatter;e.forEach((function(o,f){var d=o.started,p=o.startedTime,v=o.action,y=o.prevState,g=o.error,b=o.took,w=o.nextState,x=e[f+1];x&&(w=x.prevState,b=x.started-d);var k=r(v),S="function"==typeof a?a((function(){return w}),v,o):a,T=E(p),A=l.title?"color: "+l.title(k)+";":"",C=["color: gray; font-weight: lighter;"];C.push(A),t.timestamp&&C.push("color: gray; font-weight: lighter;"),t.duration&&C.push("color: gray; font-weight: lighter;");var P=i(k,T,b);try{S?l.title&&s?n.groupCollapsed.apply(n,["%c "+P].concat(C)):n.groupCollapsed(P):l.title&&s?n.group.apply(n,["%c "+P].concat(C)):n.group(P)}catch(e){n.log(P)}var O=m(u,k,[y],"prevState"),=m(u,k,[k],"action"),N=m(u,k,[g,y],"error"),R=m(u,k,[w],"nextState");if(O)if(l.prevState){var j="color: "+l.prevState(y)+"; font-weight: bold";n[O]("%c prev state",j,y)}else n[O]("prev state",y);if()if(l.action){var I="color: "+l.action(k)+"; font-weight: bold";n[]("%c action ",I,k)}else n[]("action ",k);if(g&&N)if(l.error){var M="color: "+l.error(g,y)+"; font-weight: bold;";n[N]("%c error ",M,g)}else n[N]("error ",g);if(R)if(l.nextState){var D="color: "+l.nextState(w)+"; font-weight: bold";n[R]("%c next state",D,w)}else n[R]("next state",w);c&&h(y,w,n,S);try{n.groupEnd()}catch(e){n.log("—— log end ——")}}))}function y(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},t=Object.assign({},C,e),n=t.logger,r=t.stateTransformer,o=t.errorTransformer,i=t.predicate,a=t.logErrors,l=t.diffPredicate;if(void 0===n)return function(){return function(e){return function(t){return e(t)}}};if(e.getState&&e.dispatch)return console.error("[redux-logger] redux-logger not installed. Make sure to pass logger instance as middleware:\n// Logger with default options\nimport { logger } from 'redux-logger'\nconst store = createStore(\n reducer,\n applyMiddleware(logger)\n)\n// Or you can create your own logger with custom options http://bit.ly/redux-logger-options\nimport createLogger from 'redux-logger'\nconst logger = createLogger({\n // ...options\n});\nconst store = createStore(\n reducer,\n applyMiddleware(logger)\n)\n"),function(){return function(e){return function(t){return e(t)}}};var u=[];return function(e){var n=e.getState;return function(e){return function(c){if("function"==typeof i&&!i(n,c))return e(c);var s={};u.push(s),s.started=x.now(),s.startedTime=new Date,s.prevState=r(n()),s.action=c;var f=void 0;if(a)try{f=e(c)}catch(e){s.error=o(e)}else f=e(c);s.took=x.now()-s.started,s.nextState=r(n());var d=t.diff&&"function"==typeof l?l(n,c):t.diff;if(v(u,Object.assign({},t,{diff:d})),u.length=0,s.error)throw s.error;return f}}}}var g,b,w=function(e,t){return function(e,t){return new Array(t+1).join(e)}("0",t-e.toString().length)+e},E=function(e){return w(e.getHours(),2)+":"+w(e.getMinutes(),2)+":"+w(e.getSeconds(),2)+"."+w(e.getMilliseconds(),3)},x="undefined"!=typeof performance&&null!==performance&&"function"==typeof performance.now?performance:Date,k="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e},S=function(e){if(Array.isArray(e)){for(var t=0,n=Array(e.length);t<e.length;t++)n[t]=e[t];return n}return Array.from(e)},T=[];g="object"===(void 0===e?"undefined":k(e))&&e?e:"undefined"!=typeof window?window:{},(b=g.DeepDiff)&&T.push((function(){void 0!==b&&g.DeepDiff===f&&(g.DeepDiff=b,b=void 0)})),n(o,r),n(i,r),n(a,r),n(l,r),Object.defineProperties(f,{diff:{value:f,enumerable:!0},observableDiff:{value:s,enumerable:!0},applyDiff:{value:function(e,t,n){e&&t&&s(e,t,(function(r){n&&!n(e,t,r)||d(e,t,r)}))},enumerable:!0},applyChange:{value:d,enumerable:!0},revertChange:{value:function(e,t,n){if(e&&t&&n&&n.kind){var r,o,i=e;for(o=n.path.length-1,r=0;r<o;r++)void 0===i[n.path[r]]&&(i[n.path[r]]={}),i=i[n.path[r]];switch(n.kind){case"A":!function e(t,n,r){if(r.path&&r.path.length){var o,i=t[n],a=r.path.length-1;for(o=0;o<a;o++)i=i[r.path[o]];switch(r.kind){case"A":e(i[r.path[o]],r.index,r.item);break;case"D":case"E":i[r.path[o]]=r.lhs;break;case"N":delete i[r.path[o]]}}else switch(r.kind){case"A":e(t[n],r.index,r.item);break;case"D":case"E":t[n]=r.lhs;break;case"N":t=u(t,n)}return t}(i[n.path[r]],n.index,n.item);break;case"D":case"E":i[n.path[r]]=n.lhs;break;case"N":delete i[n.path[r]]}}},enumerable:!0},isConflict:{value:function(){return void 0!==b},enumerable:!0},noConflict:{value:function(){return T&&(T.forEach((function(e){e()})),T=null),f},enumerable:!0}});var A={E:{color:"#2196F3",text:"CHANGED:"},N:{color:"#4CAF50",text:"ADDED:"},D:{color:"#F44336",text:"DELETED:"},A:{color:"#2196F3",text:"ARRAY:"}},C={level:"log",logger:console,logErrors:!0,collapsed:void 0,predicate:void 0,duration:!1,timestamp:!0,stateTransformer:function(e){return e},actionTransformer:function(e){return e},errorTransformer:function(e){return e},colors:{title:function(){return"inherit"},prevState:function(){return"#9E9E9E"},action:function(){return"#03A9F4"},nextState:function(){return"#4CAF50"},error:function(){return"#F20404"}},diff:!1,diffPredicate:void 0,transformer:void 0},P=function(){var e=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},t=e.dispatch,n=e.getState;return"function"==typeof t||"function"==typeof n?y()({dispatch:t,getState:n}):void console.error("\n[redux-logger v3] BREAKING CHANGE\n[redux-logger v3] Since 3.0.0 redux-logger exports by default logger with default settings.\n[redux-logger v3] Change\n[redux-logger v3] import createLogger from 'redux-logger'\n[redux-logger v3] to\n[redux-logger v3] import { createLogger } from 'redux-logger'\n")};t.defaults=C,t.createLogger=y,t.logger=P,t.default=P,Object.defineProperty(t,"__esModule",{value:!0})}(t)}).call(this,n(8))},function(e,t,n){"use strict";