var app = new Vue({
		el: '#app',
		data: {
		elements : {
		elOne : {
		dH:"",
		S:"",
		a:"",
		b:"",
		c:""
		},
		elTwo : {
		dH:"",
		S:"",
		a:"",
		b:"",
		c:""
		},
		elThree : {
		dH:"",
		S:"",
		a:"",
		b:"",
		c:""
		},
		elFour : {
		dH:"",
		S:"",
		a:"",
		b:"",
		c:""
		}
		}
		},
		methods: {
		    sendData: function () {             // данные для расчетов
            	const str = JSON.stringify(this.elements);
		// console.log(str )
		axios.post('http://localhost:8081/demo/', str)
		.then((response) => {
		console.log(response);
		})
		.catch((error) => {
		console.log(error);
		});<table>
						<!--
						one element -->
						
						<tr>
						
							
							<td>
								<input type="" name="" v-model="elements.elOne.dH">
							</td>
							<td>
								<input type="" name="" v-model="elements.elOne.S">
							</td>
							<td>
								<input type="" name="" v-model="elements.elOne.a">
							</td>
							<td>
								<input type="" name="" v-model="elements.elOne.b">
							</td>
							<td>
								<input type="" name="" v-model="elements.elOne.c">
							</td>
						</tr>
						<!--
						two element
						
						-->
						<tr>
							
							
							<td>
								<input type="" name="" v-model="elements.elTwo.dH">
							</td>
							<td>
								<input type="" name="" v-model="elements.elTwo.S">
							</td>
							<td>
								<input type="" name="" v-model="elements.elTwo.a">
							</td>
							<td>
								<input type="" name="" v-model="elements.elTwo.b">
							</td>
							<td>
								<input type="" name="" v-model="elements.elTwo.c">
							</td>
						</tr>
						<!--
						Three element
						-->
						<tr>
							
							
							<td>
								<input type="" name="" v-model="elements.elThree.dH">
							</td>
							<td>
								<input type="" name="" v-model="elements.elThree.S">
							</td>
							<td>
								<input type="" name="" v-model="elements.elThree.a">
							</td>
							<td>
								<input type="" name="" v-model="elements.elThree.b">
							</td>
							<td>
								<input type="" name="" v-model="elements.elThree.c">
							</td>
						</tr>
						<!--
						
						end element
						-->
						<tr>
														
							<td>
								<input type="" name="" v-model="elements.elFour.dH">
							</td>
							<td>
								<input type="" name="" v-model="elements.elFour.S">
							</td>
							<td>
								<input type="" name="" v-model="elements.elFour.a">
							</td>
							<td>
								<input type="" name="" v-model="elements.elFour.b">
							</td>
							<td>
								<input type="" name="" v-model="elements.elFour.c">
							</td>
						</tr>
						
						
					</table>var express = require("express");
var bodyParser = require("body-parser");
var fs = require('fs');
var app = express();
 
// создаем парсер для данных application/x-www-form-urlencoded
var urlencodedParser = bodyParser.urlencoded({extended: false});
 
app.use(express.static(__dirname + "/public"));
 
app.post("/", urlencodedParser, function (request, response) {
    if(!request.body) return response.sendStatus(400);
    console.log(request.body);
    // преобразуем данные в json
    var str = JSON.stringify(request.body);
    // записываем данные в json
	fs.writeFileSync('test.json', str); 
//  отправляем ответ
  // response.send(`${str}`);
});
 
app.listen(8081);
 console.log ('http://localhost:8081' )