Иван Минаков

.tooltip2:hover+.tooltip {
  opacity:1;
 }

let text = 'test1 test2 test3 test4';
let newLastWord = 'word';

let words = text.split(' ');
words[words.length - 1] = newLastWord;

text = words.join(' '); // "test1 test2 test3 word"

String.prototype.myFunc = function() {
  return this + this.split('').reverse().join('');
}

handleSubmitForm(event) {
  event.preventDefault();

  let message = Object.assign({}, this.state.messages);

  axios.post('/articles/add', {
    title: this.state.articles.title,
    content: this.state.articles.content
  })
    .then(function(response) {
      message.success = true;

      this.setState({
        messages: message
      });
    })
    .catch(function(error) {
      message.error = error;

      this.setState({
        messages: message
      });
    });
}

let arrayForTest = [1000,4000,8000,12000,16000];

function checkIndex(array, number) {
	let resultIndex;

	array.some((elem, index, array) => { number > elem && ( number < array[index + 1] || index === array.length - 1) ? (resultIndex = index) || true : false  });

	return resultIndex;
}

checkIndex(a, 1500) //0 
checkIndex(a, 4500) //1
checkIndex(a, 19000) //4

setTimeout(() => {
	var textInputUploadFile = $('form').find('.file-input-name').text();
    $("input[name=inputFileText]").val(textInputUploadFile);
}, 0);

$('input[name=inputFile]').on('change', function() {
		$("input[name=inputFileText]").val($(this).get(0).files[0].name);
  });

window.onbeforeunload = function(e) {
  var dialogText = 'Dialog text here';
  e.returnValue = dialogText;
  return dialogText;
};