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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 | 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 84x 650x 650x 500x 500x 500x 2x 2x 2x 500x 84x 567x 532x 32x 500x 532x 1845x 777x 777x 84x 128x 128x 3x 1313x 898x 897x 415x 1313x 84x 88x 84x 1225x 84x 2671x 70x 70x 70x 70x 70x 70x 78x 78x 70x 70x 70x 70x 84x 1684x 1684x 655x 655x 655x 1x 1x 654x 654x 654x 654x 654x 1239x 1239x 654x 654x 84x 1264x 787x 787x 787x 787x 787x 787x 787x 527x 787x 787x 529x 529x 527x 527x 787x 787x 787x 787x 787x 787x 10x 1844x 1835x 9x 9x 9x | import { ErrorCodes, callWithErrorHandling } from './errorHandling' import { isArray, NOOP } from '@vue/shared' import { ComponentInternalInstance, getComponentName } from './component' import { warn } from './warning' export interface SchedulerJob extends Function { id?: number active?: boolean computed?: boolean /** * Indicates whether the effect is allowed to recursively trigger itself * when managed by the scheduler. * * By default, a job cannot trigger itself because some built-in method calls, * e.g. Array.prototype.push actually performs reads as well (#1740) which * can lead to confusing infinite loops. * The allowed cases are component update functions and watch callbacks. * Component update functions may update child component props, which in turn * trigger flush: "pre" watch callbacks that mutates state that the parent * relies on (#1801). Watch callbacks doesn't track its dependencies so if it * triggers itself again, it's likely intentional and it is the user's * responsibility to perform recursive state mutation that eventually * stabilizes (#1727). */ allowRecurse?: boolean /** * Attached by renderer.ts when setting up a component's render effect * Used to obtain component information when reporting max recursive updates. * dev only. */ ownerInstance?: ComponentInternalInstance } export type SchedulerJobs = SchedulerJob | SchedulerJob[] let isFlushing = false let isFlushPending = false const queue: SchedulerJob[] = [] let flushIndex = 0 const pendingPreFlushCbs: SchedulerJob[] = [] let activePreFlushCbs: SchedulerJob[] | null = null let preFlushIndex = 0 const pendingPostFlushCbs: SchedulerJob[] = [] let activePostFlushCbs: SchedulerJob[] | null = null let postFlushIndex = 0 const resolvedPromise = /*#__PURE__*/ Promise.resolve() as Promise<any> let currentFlushPromise: Promise<void> | null = null let currentPreFlushParentJob: SchedulerJob | null = null const RECURSION_LIMIT = 100 type CountMap = Map<SchedulerJob, number> export function nextTick<T = void>( this: T, fn?: (this: T) => void ): Promise<void> { const p = currentFlushPromise || resolvedPromise return fn ? p.then(this ? fn.bind(this) : fn) : p } // #2768 // Use binary-search to find a suitable position in the queue, // so that the queue maintains the increasing order of job's id, // which can prevent the job from being skipped and also can avoid repeated patching. function findInsertionIndex(id: number) { // the start index should be `flushIndex + 1` let start = flushIndex + 1 let end = queue.length while (start < end) { const middle = (start + end) >>> 1 const middleJobId = getId(queue[middle]) middleJobId < id ? (start = middle + 1) : (end = middle) } return start } export function queueJob(job: SchedulerJob) { // the dedupe search uses the startIndex argument of Array.includes() // by default the search index includes the current job that is being run // so it cannot recursively trigger itself again. // if the job is a watch() callback, the search will start with a +1 index to // allow it recursively trigger itself - it is the user's responsibility to // ensure it doesn't end up in an infinite loop. if ( (!queue.length || !queue.includes( job, isFlushing && job.allowRecurse ? flushIndex + 1 : flushIndex )) && job !== currentPreFlushParentJob ) { if (job.id == null) { queue.push(job) } else { queue.splice(findInsertionIndex(job.id), 0, job) } queueFlush() } } function queueFlush() { if (!isFlushing && !isFlushPending) { isFlushPending = true currentFlushPromise = resolvedPromise.then(flushJobs) } } export function invalidateJob(job: SchedulerJob) { const i = queue.indexOf(job) if (i > flushIndex) { queue.splice(i, 1) } } function queueCb( cb: SchedulerJobs, activeQueue: SchedulerJob[] | null, pendingQueue: SchedulerJob[], index: number ) { if (!isArray(cb)) { if ( !activeQueue || !activeQueue.includes(cb, cb.allowRecurse ? index + 1 : index) ) { pendingQueue.push(cb) } } else { // if cb is an array, it is a component lifecycle hook which can only be // triggered by a job, which is already deduped in the main queue, so // we can skip duplicate check here to improve perf pendingQueue.push(...cb) } queueFlush() } export function queuePreFlushCb(cb: SchedulerJob) { queueCb(cb, activePreFlushCbs, pendingPreFlushCbs, preFlushIndex) } export function queuePostFlushCb(cb: SchedulerJobs) { queueCb(cb, activePostFlushCbs, pendingPostFlushCbs, postFlushIndex) } export function flushPreFlushCbs( seen?: CountMap, parentJob: SchedulerJob | null = null ) { if (pendingPreFlushCbs.length) { currentPreFlushParentJob = parentJob activePreFlushCbs = [...new Set(pendingPreFlushCbs)] pendingPreFlushCbs.length = 0 if (__DEV__) { seen = seen || new Map() } for ( preFlushIndex = 0; preFlushIndex < activePreFlushCbs.length; preFlushIndex++ ) { Iif ( __DEV__ && checkRecursiveUpdates(seen!, activePreFlushCbs[preFlushIndex]) ) { continue } activePreFlushCbs[preFlushIndex]() } activePreFlushCbs = null preFlushIndex = 0 currentPreFlushParentJob = null // recursively flush until it drains flushPreFlushCbs(seen, parentJob) } } export function flushPostFlushCbs(seen?: CountMap) { // flush any pre cbs queued during the flush (e.g. pre watchers) flushPreFlushCbs() if (pendingPostFlushCbs.length) { const deduped = [...new Set(pendingPostFlushCbs)] pendingPostFlushCbs.length = 0 // #1947 already has active queue, nested flushPostFlushCbs call if (activePostFlushCbs) { activePostFlushCbs.push(...deduped) return } activePostFlushCbs = deduped if (__DEV__) { seen = seen || new Map() } activePostFlushCbs.sort((a, b) => getId(a) - getId(b)) for ( postFlushIndex = 0; postFlushIndex < activePostFlushCbs.length; postFlushIndex++ ) { Iif ( __DEV__ && checkRecursiveUpdates(seen!, activePostFlushCbs[postFlushIndex]) ) { continue } activePostFlushCbs[postFlushIndex]() } activePostFlushCbs = null postFlushIndex = 0 } } const getId = (job: SchedulerJob): number => job.id == null ? Infinity : job.id function flushJobs(seen?: CountMap) { isFlushPending = false isFlushing = true if (__DEV__) { seen = seen || new Map() } flushPreFlushCbs(seen) // Sort queue before flush. // This ensures that: // 1. Components are updated from parent to child. (because parent is always // created before the child so its render effect will have smaller // priority number) // 2. If a component is unmounted during a parent component's update, // its update can be skipped. queue.sort((a, b) => getId(a) - getId(b)) // conditional usage of checkRecursiveUpdate must be determined out of // try ... catch block since Rollup by default de-optimizes treeshaking // inside try-catch. This can leave all warning code unshaked. Although // they would get eventually shaken by a minifier like terser, some minifiers // would fail to do that (e.g. https://github.com/evanw/esbuild/issues/1610) const check = __DEV__ ? (job: SchedulerJob) => checkRecursiveUpdates(seen!, job) : NOOP try { for (flushIndex = 0; flushIndex < queue.length; flushIndex++) { const job = queue[flushIndex] if (job && job.active !== false) { Iif (__DEV__ && check(job)) { continue } // console.log(`running:`, job.id) callWithErrorHandling(job, null, ErrorCodes.SCHEDULER) } } } finally { flushIndex = 0 queue.length = 0 flushPostFlushCbs(seen) isFlushing = false currentFlushPromise = null // some postFlushCb queued jobs! // keep flushing until it drains. if ( queue.length || pendingPreFlushCbs.length || pendingPostFlushCbs.length ) { flushJobs(seen) } } } function checkRecursiveUpdates(seen: CountMap, fn: SchedulerJob) { if (!seen.has(fn)) { seen.set(fn, 1) } else { const count = seen.get(fn)! Iif (count > RECURSION_LIMIT) { const instance = fn.ownerInstance const componentName = instance && getComponentName(instance.type) warn( `Maximum recursive updates exceeded${ componentName ? ` in component <${componentName}>` : `` }. ` + `This means you have a reactive effect that is mutating its own ` + `dependencies and thus recursively triggering itself. Possible sources ` + `include component template, render function, updated hook or ` + `watcher source function.` ) return true } else { seen.set(fn, count + 1) } } } |