fetch_async_await.js

import test from './test.txt'

class A {
    constructor() { }
    async loadFile(filename) {
        let data = await (await fetch(filename))
        return data
    }
}

class B extends A {
    constructor() {
        super()
        this.contents = ''
    }

    async loadFile(filename) {
        let data = await super.loadFile(filename)
        data.text().then( text => {
            console.log('Text: ', text)
            this.parse(text)
        }).catch( error => {
            console.log('Error: ', error)
        })
    }

    parse (data) {
        this.contents = data
        console.log('Parsing data: ', data)
    }
}

let b = new B()
b.loadFile(test).then( () => {
    console.log('Got data now: ', b.contents)
})