function render(callback?:()=>void): string這句ts函數(shù) 參數(shù)的意思是callback的返回值是函數(shù) 返回函數(shù)的返回值是voidfunction render(callback?:void): string這句ts函數(shù) 參數(shù)的意思是callback的返回值是void我這樣理解對(duì)嗎？
ts函數(shù)參數(shù)(callback?:()=>void)和(callback?:void)有什么區(qū)別？
瀟瀟雨雨
2019-03-13 13:14:12