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chai 
should.js
expect

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mocha
jasmine
tape
Qunit
ava
jest

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https://webpack.js.org/loaders/css-loader/
https://webpack.js.org/loaders/babel-loader/

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babel - recommended 
typescript - type safety 
elm - steep learning curve but cause no errors in runtime

transpiling with babel: http://jsrocks.org/2016/01/configuring-babel-6-for-node-js

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1. grunt 
2. gulp 
3. npm scripts

http://bit.ly/npmvsgulp

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1. http-server
2. live-server
3. express ( alternatives: kapi and hoa) 
4. budo
5. webpack dev server 
6. browserSync

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local-tunnel 
ngrok
now 
surge

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https://github.com/settings/applications/new

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https://www.splessons.com/how-to-use-ng-option-to-set-default-value-of-select-element/

/*a clear explanation can be found here on how to use default value in drop down*/
https://www.gurustop.net/blog/2014/01/28/common-problems-and-solutions-when-using-select-elements-with-angular-js-ng-options-initial-selection/

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let counter = 0; 

const getData = function() { 
    console.log('fetching data ...' + counter++); 
}; 

const debounce = function(fn, delay) { 
    let timer; 
    return function() { 
        let context = this,