# vue3 源码 依赖收集
baseHandlers里面频繁的调用的几个函数
track 依赖收集
trigger 触发依赖
- 这两个函数为
effect里的方法,effect作为reactive的核心，主要负责收集依赖，更新依赖
# f:effect.ts
packages\reactivity\src\effect.ts
export interface ReactiveEffectOptions extends DebuggerOptions {
lazy?: boolean
scheduler?: EffectScheduler
scope?: EffectScope
allowRecurse?: boolean
onStop?: () => void
}
export interface ReactiveEffectRunner<T = any> {
(): T
effect: ReactiveEffect
}
export function effect<T = any>(
fn: () => T,
options?: ReactiveEffectOptions
): ReactiveEffectRunner {
if ((fn as ReactiveEffectRunner).effect) {
fn = (fn as ReactiveEffectRunner).effect.fn
}
const _effect = new ReactiveEffect(fn)
if (options) {
extend(_effect, options)
if (options.scope) recordEffectScope(_effect, options.scope)
}
if (!options || !options.lazy) {
_effect.run()
}
const runner = _effect.run.bind(_effect) as ReactiveEffectRunner
runner.effect = _effect
return runner
}