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What is the difference between Client side JavaScript and Server side JavaScript ?

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What is the difference between Client side JavaScript and Server side JavaScript ?
posted Apr 5, 2017 by Kushal S

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1 Answer

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Client side java script comprises of the basic language and predefined objects which are relevant to running java script in a browser. The client side java script is embedded directly by in the HTML pages. This script is interpreted by the browser at run time.
- It is JavaScript that enables the enables web pages on browsers to run active online content.

Server side java script also resembles like client side java script. It has relevant java script which is to run in a server. The server side java scripts are deployed only after compilation.
- It is JavaScript that enables back-end access to databases, file systems, and servers.

answer Apr 6, 2017 by Snehal Raikar
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i want to sent a response for my form submit from server to client, that means python flask to javascript. My javascript code is given follows

document.addEventListener('DOMContentLoaded', function() {

chrome.tabs.getSelected(null, function(tab) {
  d = document;
  var f = d.createElement('form');
  f.action = 'http://127.0.0.1:5000/Get%20Form/';
  f.method = 'post';
  var i = d.createElement('input');
  i.type = 'hidden';
  i.name = 'url';
  i.value = tab.url;
  f.appendChild(i);
  d.body.appendChild(f);
  f.submit();   
});
$(".button").click(function(){
    request = new XMLHttpRequest();
    request.open("POST","http://127.0.0.1:5000/PutValue/",true);
    request.send();
    request.addEventListener("readystatechange", processRequest,false);
    function processRequest(e)
    {
    if(request.readyState==4 && request.status == 200)
    {
    var response = JSON.parse(request.responseText);
    a=response.result
    alert(a);
    }
    }
});
},false);

And my Python server code is follows

from flask import Flask, flash, redirect, url_for, request, render_template,jsonify
import json
import UrlTest
import trainingSet as ts

app = Flask(__name__)
user=""
s=0

@app.route('/Get Form/',methods = ['POST'])
def GetForm():
request.method == 'POST'
url=request.form['url']
UrlTest.process_test_url(url,'test_features.csv')
s=ts.main_caller('url_features.csv','test_features.csv')
print s
return str(s)

@app.route('/PutValue/',methods = ['POST'])
def PutValue():
request.method == 'POST'
print s
return jsonify(result=s)


if (__name__ == '__main__'):
app.run(debug=True,host='0.0.0.0', use_reloader=False)

I want to send the value of s to the javascript client. please help me to send this the value of s.
and if u can suggest the complete code in javascipt and python

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