Uncaught (in promise)

如果promise中 reject的错误没有被catch出来就会报这个错误

// Uncaught (in promise)

let a = new Promise((resove,reject)=>{

reject(1)

}

// ok

let a = new Promise((resove,reject)=>{

reject(1)

}.then((res)=>{},(err)=>{})

// Uncaught (in promise)

let b = new Promise((resove,reject)=>{

throw new Error(1)

})

// error

a = new Promise((resove,reject)=>{

throw new Error(1)

}).catch((res)=>{})

// ok

let b = new Promise((resove,reject)=>{

new Error(1)

})

// ok

a = new Promise((resove,reject)=>{

throw new Error(1)

}).catch((res)=>{})

Uncaught (in promise)

原文：https://www.cnblogs.com/eret9616/p/11546470.html