typescript 装饰器
Published:
·
LastMod: August 22, 2023
·
152 words
typescript 装饰器 🔗
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| declare type MethodDecorator = <T>(
target: Object,
propertyKey: string | symbol,
descriptor: TypedPropertyDescriptor<T>
) => TypedPropertyDescriptor<T> | void
type VoidFn = ((...args: any[]) => void) | ((...args: any[]) => Promise<void>)
export const Performance = () => (target: any, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<VoidFn>) => {
const originalMethod = descriptor.value
if (originalMethod) {
descriptor.value = function (this: any, ...args: any[]) {
const handleError = (error: any) => {
console.error(error)
// etc.
}
const t1 = window.performance.now()
try {
const result: any = originalMethod.apply(this, args)
const t2 = window.performance.now()
console.log(`Performance time: ${t2 - t1}`)
// @ts-ignore
if (result && result instanceof Promise) {
return result.catch(handleError)
}
} catch (error) {
handleError(error)
}
}
return descriptor
}
}
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