Recursive try/catch statements for async/await functions in a nested object (using .catch)

async-trycatch.js

// Simulates try/catch statements wrapping async functions in (nested) object
// Returns copy of original object with basic promise-rejection handling for async functions using .catch
// Saves the time of writing try/catch statements in every single async function

const trycatch = obj => Object.keys(obj)
  .reduce((acc, curr) => ({ ...acc, [curr]: obj[curr] instanceof Function
    ? (...args) => obj[curr](...args).catch(::console.error)
    : trycatch(obj[curr]) }), {})


// Example
const actions = (db) => trycatch({

  async test(id) {
    console.log(id)
  },
  
  get: {
  
    async user(id) {
      await db.users.get(id)
    },
    
    async session(id) {
      throw new Error('TODO')
    },
    
    ...
  
  }

})

// Instead of:
const actions = (db) => ({

  async test(id) {
    try {
      console.log(id)
    } catch(err) {
      console.error(err)
    }
  },
  
  get: {
  
    async user(id) {
      try {
        await db.users.get(id) 
      } catch(err) {
        console.error(err)
      }
    },
    
    async session(id) {
      try {
        throw new Error('TODO')
      } catch(err) {
        console.error(err)
      }
    },
    
    ...
  
  }

})