标签：传参 ons new throw span div ror class color
let require = ()=>{throw new Error(‘函数必须传参‘)}
let print = (num=require())=>{console.log(num)}
print(2) // 2
print(null) // null
print() // 报错
标签：传参 ons new throw span div ror class color
原文地址：https://www.cnblogs.com/luguankun/p/14367970.html
