js 能动态创建不存在的方法么

This topic created in 2272 days ago, the information mentioned may be changed or developed.

比如

A.add100(1) == 101

A.add200(1) == 201

...

能动

创建

a.ad

方法

3 replies • 2020-03-26 01:37:36 +08:00

FeifeiJin

Mar 26, 2020 via Android

eval 理论上可以的

xcstream

Mar 26, 2020

百度了一下解决了

const { MethodMissingClass } = require('unmiss')
class Add extends MethodMissingClass {
methodMissing(name, ...args) {
return Number(name.substr(3)) + args[0]
}
}
const A = new Add;
const r = A.add1000(1)
console.log(r)

seki

Mar 26, 2020

基本就是 proxy 的玩法

```
import _ from 'lodash'

const wrapped = {}

const proxy = new Proxy(wrapped, {
get(target, p, val) {
if (_.isString(p) && _.startsWith(p, 'add')) {
const v = parseInt(p.replace('add', ''), 10)
return q => q + v
}
}
})

console.log(proxy.add100(1))
```