From Station to Station

JavaScript toolkits library accumulated from working from project to project.

• Install
• Library
  • Logger
  • Cache
  • JS

Install

npm install --save fsts

Library

Logger

Javascript developers like to write console.log, then cleanup, then write more, then cleanup ...

Java developers don't write a lot System.out.println, because they have Logger.

Use Logger in your project. Use this one, or simply write your own. No more console.log please.

Usage

import { Logger } from 'fsts';

const logger = new Logger('MyClass');

export default class MyClass {
    constructor() {
        logger.info('instance created');
    }

    doSomething() {
        somePromise()
            .then(data => logger.debug('some promise data', data))
            .catch(err => logger.error('some promise error', err));
    }
}

Log Level

Logger has level, by default it is 'WARN', so your .info and .debug would not write anything to conole. You can set LOG_LEVEL to see debug logs in development mode.

Logger.LOG_LEVEL = 'DEBUG';

Or during debug, write window.LOG_LEVEL = 'DEBUG' in your console to open it.

Cache

Cache make use of window.localStorage. If not available then create in-memory cache.

import { Cache } from 'fsts';

const item = 'hello';
Cache.set('key', item);
Cache.get('key'); // 'hello'

const item = { greeting: 'hello' };
Cache.set('key', item);
Cache.get('key'); // { greeting: 'hello' }

const item = ['hello', 'there'];
Cache.set('key', item);
Cache.get('key'); // ['hello', 'there']

JS

Javascript language helper methods

import { JS } from 'fsts';

String

JS.padNumber('9', 2); // 09
JS.padNumber('10', 2); // 10

Object

let obj = { a: 'a', b: 'b' };
JS.lessProps(obj, 'b'); // obj: { a: 'a' }

obj = { a: 'a', b: 'b', ba: 'ba' };
JS.lessProps(obj, 'b.*'); // obj: { a: 'a' }

obj = { a: 'a', b: 'b', c: { a: 'ca', b: 'cb' } };
JS.travaseProps(obj, (path, key, val) => {
    console.log(path, key, val);
});

Array

JS.isArray('str'); // false
JS.isArray({}); // false
JS.isArray([]); // true

JS.sureArray('str'); // ['str']
JS.sureArray(); // []
JS.sureArray([1, 2]); // [1, 2]

JS.appendUnique([1, 2], [1]); // [1, 2]
JS.appendUnique([1, 2], [3]); // [1, 2, 3]