audio-vis/raw/javascript/config.js

class Config {
    constructor() {
        this.config = {};
        this.name = ''
    }

    loadConfigByName(name) {
        this.save();
        this.name = 'config-' + name;
        let item = localStorage.getItem(this.name);
        if (item) {
            this.config = JSON.parse(item);
        }
    }

    save() {
        if (this.name !== '') {
            localStorage.setItem(this.name, JSON.stringify(this.config));
        }
    }

    set(name, value) {
        this.config[name] = value;
    }

    remove(name) {
        delete this.config[name];
    }

    get(name, def) {
        let value = this.config[name];
        if (value === undefined || value === null) {
            this.config[name] = def;
            value = def;
        }
        return value;
    }
}