| 74 | } |
| 75 | |
| 76 | const load = (): Promise<ConcreteComponent> => { |
| 77 | let thisRequest: Promise<ConcreteComponent> |
| 78 | return ( |
| 79 | pendingRequest || |
| 80 | (thisRequest = pendingRequest = |
| 81 | loader() |
| 82 | .catch(err => { |
| 83 | err = err instanceof Error ? err : new Error(String(err)) |
| 84 | if (userOnError) { |
| 85 | return new Promise((resolve, reject) => { |
| 86 | const userRetry = () => resolve(retry()) |
| 87 | const userFail = () => reject(err) |
| 88 | userOnError(err, userRetry, userFail, retries + 1) |
| 89 | }) |
| 90 | } else { |
| 91 | throw err |
| 92 | } |
| 93 | }) |
| 94 | .then((comp: any) => { |
| 95 | if (thisRequest !== pendingRequest && pendingRequest) { |
| 96 | return pendingRequest |
| 97 | } |
| 98 | if (__DEV__ && !comp) { |
| 99 | warn( |
| 100 | `Async component loader resolved to undefined. ` + |
| 101 | `If you are using retry(), make sure to return its return value.`, |
| 102 | ) |
| 103 | } |
| 104 | // interop module default |
| 105 | if ( |
| 106 | comp && |
| 107 | (comp.__esModule || comp[Symbol.toStringTag] === 'Module') |
| 108 | ) { |
| 109 | comp = comp.default |
| 110 | } |
| 111 | if (__DEV__ && comp && !isObject(comp) && !isFunction(comp)) { |
| 112 | throw new Error(`Invalid async component load result: ${comp}`) |
| 113 | } |
| 114 | resolvedComp = comp |
| 115 | return comp |
| 116 | })) |
| 117 | ) |
| 118 | } |
| 119 | |
| 120 | return defineComponent({ |
| 121 | name: 'AsyncComponentWrapper', |