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$name-class: ".block1";
#{$name-class} {
  font-size: 100px;
  
  &__inner {
    font-size: 10px;
    &:before { content: ""; }
    
    @at-root #{$name-class}:hover &:before {
      color: red;

dmjcomdem

<div ng-class="condition ? 'class-if-true' : 'class-if-false'">

dmjcomdem

<svg shape-rendering="crispEdges" 
  width="100%" height="100%" viewBox="0 0 30 30" version="1.1"
  xmlns="http://www.w3.org/2000/svg" 
  xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve">

    <use xlink:href="#name-icon"></use>

</svg>

<svg class="icon" width="100%" height="100%" viewBox="0 0 30 30" version="1.1" xmlns="http://www.w3.org/2000/svg" shape-rendering="crispEdges">

dmjcomdem

<!-- Add class  ng-modal -->
<input type="text" ng-model="styleOne">
<input type="text" ng-model="styleTwo">
<div ng-class="[styleOne, styleTwo]">Look! I'm Words!</div>

<!-- Add the class 'text-success' if the variable 'awesome' is true -->
<input type="checkbox" ng-model="awesome"> Are You Awesome?
<input type="checkbox" ng-model="giant"> Are You a Giant?
<div ng-class="{ 'text-success': awesome, 'text-large': giant }">
  

dmjcomdem

@mobile: ~'@media (max-width: 400px) ';
@tablet: ~'@media (max-width: 800px) ';

.bp(@rules) {
  @media @mobile { 
    & .mobile  { @rules(); }
  }
}

.bp2(@point,@rules) {

dmjcomdem

/*
 * @param {DOM Element Object} o 
 * @param {String} c name class
 */

function addClass(o, c) {
    var re = new RegExp("(^|\\s)" + c + "(\\s|$)", "g");
    if (re.test(o.className)) return
    o.className = (o.className + " " + c).replace(/\s+/g, " ").replace(/(^ | $)/g, "");
}

dmjcomdem

{
  "user": "Ученик",
  "courses": [
    {
      "name": "HTML, CSS",
      "passed": "true"
    },
    { 
      "name": "JavaScript Essential",
      "passed": "true"

dmjcomdem

_startTimer(){
    this._stopTimer();
    let timeSeconds = 1;
    this._timerInterval = this.$interval(() => {
        timeSeconds += 1;
        this.onlineTimeText = this._formatTime(timeSeconds);
    }, 1000);
    this.onlineTimeText = this._formatTime(timeSeconds)
}
_stopTimer(){

dmjcomdem

if (speciality.id in DescriptionSpeciality)
  return DescriptionSpeciality[speciality.id];

dmjcomdem

let a = [1,2,3,4,5,6,3,4,6,6,3,7,8,8,8,4,5,7,4,6];

let object = a.reduce( (current, item) => {
  current[item] = (current[item] || 0) + 1;
  return current;
}, {})

let arrayValue = Object.keys(object).reduce( (current, item) => {
  current.push( object[item] );
  return current