Check for cookie and log the result in React
I want to check if a cookie exists and if not I want to give the cookie auth a false value. If the cookie is false I want to redirect to / and if the cookie is true it should redirect to /home. Because I can not seem to get it working I removed the redirect and changed it to console.log("value"); so that I can see if it is working.
checkLogin() {
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === null) {
console.log("null");
localStorage.setItem("auth", false);
}
if (AuthCookie === false) {
console.log("false");
}
else if (AuthCookie === true) {
console.log("true");
}
else {
console.log("AuthCookie is neither false or true");
}
}
There is no output in the console with this code and I do not know why.
I want to store data locally, in this case it is a login page, but this is just to test the storing of the data.
import React, {Component} from 'react';
import ReactDOM from 'react-dom';
import { Redirect, Router } from 'react-router-dom';
import * as serviceWorker from './serviceWorker';
import Routes from './inc/routes';
import Navbar from './components/parts/navbar';
class Loader extends Component {
checkLogin() {
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === null) {
console.log("null");
localStorage.setItem("auth", false);
}
if (AuthCookie === false) {
console.log("false");
}
else if (AuthCookie === true) {
console.log("true");
}
else {
console.log("AuthCookie is neither false or true");
}
}
render() {
this.checkLogin();
return (
<div>
<Navbar />
<Routes />
</div>
);
}
}
ReactDOM.render(<Loader />, document.getElementById('root'));
Console now gives me AuthCookie is neither false or true, but when I look at application and localstorage it says that auth is false. Console shows no other errors or warnings.
javascript reactjs
asked Nov 19 '18 at 13:00
Jeff Jeff
8310
add a comment |
I want to check if a cookie exists and if not I want to give the cookie auth a false value. If the cookie is false I want to redirect to / and if the cookie is true it should redirect to /home. Because I can not seem to get it working I removed the redirect and changed it to console.log("value"); so that I can see if it is working.
checkLogin() {
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === null) {
console.log("null");
localStorage.setItem("auth", false);
}
if (AuthCookie === false) {
console.log("false");
}
else if (AuthCookie === true) {
console.log("true");
}
else {
console.log("AuthCookie is neither false or true");
}
}
There is no output in the console with this code and I do not know why.
I want to store data locally, in this case it is a login page, but this is just to test the storing of the data.
import React, {Component} from 'react';
import ReactDOM from 'react-dom';
import { Redirect, Router } from 'react-router-dom';
import * as serviceWorker from './serviceWorker';
import Routes from './inc/routes';
import Navbar from './components/parts/navbar';
class Loader extends Component {
checkLogin() {
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === null) {
console.log("null");
localStorage.setItem("auth", false);
}
if (AuthCookie === false) {
console.log("false");
}
else if (AuthCookie === true) {
console.log("true");
}
else {
console.log("AuthCookie is neither false or true");
}
}
render() {
this.checkLogin();
return (
<div>
<Navbar />
<Routes />
</div>
);
}
}
ReactDOM.render(<Loader />, document.getElementById('root'));
Console now gives me AuthCookie is neither false or true, but when I look at application and localstorage it says that auth is false. Console shows no other errors or warnings.
javascript reactjs
asked Nov 19 '18 at 13:00
Jeff Jeff
8310
1
how and when are you calling checkLogin
– Shubham Khatri
Nov 19 '18 at 13:03
2
localStorage !== cookies. what you are trying to do?
– Dekel
Nov 19 '18 at 13:10
This code will always log something, providingcheckLoginis being called, and that there are no errors. So: are there any errors in the console? Are you surecheckLoginis being called? (You don't show us any code which calls it.)
– Robin Zigmond
Nov 19 '18 at 13:20
@Dekel sorry, you are right. I first tried it with a cookie, but now am trying with localstorage.
– Jeff
Nov 19 '18 at 13:54
add a comment |
I want to check if a cookie exists and if not I want to give the cookie auth a false value. If the cookie is false I want to redirect to / and if the cookie is true it should redirect to /home. Because I can not seem to get it working I removed the redirect and changed it to console.log("value"); so that I can see if it is working.
checkLogin() {
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === null) {
console.log("null");
localStorage.setItem("auth", false);
}
if (AuthCookie === false) {
console.log("false");
}
else if (AuthCookie === true) {
console.log("true");
}
else {
console.log("AuthCookie is neither false or true");
}
}
There is no output in the console with this code and I do not know why.
I want to store data locally, in this case it is a login page, but this is just to test the storing of the data.
import React, {Component} from 'react';
import ReactDOM from 'react-dom';
import { Redirect, Router } from 'react-router-dom';
import * as serviceWorker from './serviceWorker';
import Routes from './inc/routes';
import Navbar from './components/parts/navbar';
class Loader extends Component {
checkLogin() {
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === null) {
console.log("null");
localStorage.setItem("auth", false);
}
if (AuthCookie === false) {
console.log("false");
}
else if (AuthCookie === true) {
console.log("true");
}
else {
console.log("AuthCookie is neither false or true");
}
}
render() {
this.checkLogin();
return (
<div>
<Navbar />
<Routes />
</div>
);
}
}
ReactDOM.render(<Loader />, document.getElementById('root'));
Console now gives me AuthCookie is neither false or true, but when I look at application and localstorage it says that auth is false. Console shows no other errors or warnings.
javascript reactjs
asked Nov 19 '18 at 13:00
Jeff Jeff
8310
I want to check if a cookie exists and if not I want to give the cookie auth a false value. If the cookie is false I want to redirect to / and if the cookie is true it should redirect to /home. Because I can not seem to get it working I removed the redirect and changed it to console.log("value"); so that I can see if it is working.
checkLogin() {
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === null) {
console.log("null");
localStorage.setItem("auth", false);
}
if (AuthCookie === false) {
console.log("false");
}
else if (AuthCookie === true) {
console.log("true");
}
else {
console.log("AuthCookie is neither false or true");
}
}
There is no output in the console with this code and I do not know why.
I want to store data locally, in this case it is a login page, but this is just to test the storing of the data.
import React, {Component} from 'react';
import ReactDOM from 'react-dom';
import { Redirect, Router } from 'react-router-dom';
import * as serviceWorker from './serviceWorker';
import Routes from './inc/routes';
import Navbar from './components/parts/navbar';
class Loader extends Component {
checkLogin() {
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === null) {
console.log("null");
localStorage.setItem("auth", false);
}
if (AuthCookie === false) {
console.log("false");
}
else if (AuthCookie === true) {
console.log("true");
}
else {
console.log("AuthCookie is neither false or true");
}
}
render() {
this.checkLogin();
return (
<div>
<Navbar />
<Routes />
</div>
);
}
}
ReactDOM.render(<Loader />, document.getElementById('root'));
Console now gives me AuthCookie is neither false or true, but when I look at application and localstorage it says that auth is false. Console shows no other errors or warnings.
javascript reactjs
javascript reactjs
asked Nov 19 '18 at 13:00
Jeff Jeff
8310
asked Nov 19 '18 at 13:00
Jeff Jeff
8310
edited Nov 19 '18 at 14:32
Jeff
asked Nov 19 '18 at 13:00
Jeff Jeff
8310
asked Nov 19 '18 at 13:00
Jeff Jeff
8310
asked Nov 19 '18 at 13:00
Jeff Jeff
8310
8310
1
how and when are you calling checkLogin
– Shubham Khatri
Nov 19 '18 at 13:03
2
localStorage !== cookies. what you are trying to do?
– Dekel
Nov 19 '18 at 13:10
This code will always log something, providingcheckLoginis being called, and that there are no errors. So: are there any errors in the console? Are you surecheckLoginis being called? (You don't show us any code which calls it.)
– Robin Zigmond
Nov 19 '18 at 13:20
@Dekel sorry, you are right. I first tried it with a cookie, but now am trying with localstorage.
– Jeff
Nov 19 '18 at 13:54
add a comment |
1
how and when are you calling checkLogin
– Shubham Khatri
Nov 19 '18 at 13:03
2
localStorage !== cookies. what you are trying to do?
– Dekel
Nov 19 '18 at 13:10
This code will always log something, providingcheckLoginis being called, and that there are no errors. So: are there any errors in the console? Are you surecheckLoginis being called? (You don't show us any code which calls it.)
– Robin Zigmond
Nov 19 '18 at 13:20
@Dekel sorry, you are right. I first tried it with a cookie, but now am trying with localstorage.
– Jeff
Nov 19 '18 at 13:54
1
1
how and when are you calling checkLogin
– Shubham Khatri
Nov 19 '18 at 13:03
how and when are you calling checkLogin
– Shubham Khatri
Nov 19 '18 at 13:03
2
2
localStorage !== cookies. what you are trying to do?
– Dekel
Nov 19 '18 at 13:10
localStorage !== cookies. what you are trying to do?
– Dekel
Nov 19 '18 at 13:10
This code will always log something, providing
checkLogin is being called, and that there are no errors. So: are there any errors in the console? Are you sure checkLogin is being called? (You don't show us any code which calls it.)– Robin Zigmond
Nov 19 '18 at 13:20
This code will always log something, providing
checkLogin is being called, and that there are no errors. So: are there any errors in the console? Are you sure checkLogin is being called? (You don't show us any code which calls it.)– Robin Zigmond
Nov 19 '18 at 13:20
@Dekel sorry, you are right. I first tried it with a cookie, but now am trying with localstorage.
– Jeff
Nov 19 '18 at 13:54
@Dekel sorry, you are right. I first tried it with a cookie, but now am trying with localstorage.
– Jeff
Nov 19 '18 at 13:54
add a comment |
2 Answers
2
active
oldest
votes
Are you sure AuthCookie is null, perhaps it is undefined, although we can not know without showing where it is assigned to localStorage initially.
Try to work backwards when debugging, so start by console logging AuthCookie when calling the function so you can be sure it is assigned the value you expect. Otherwise go further back to where it is being assigned to localStorage and check the value there. We can not know for sure with the code provided but id say the value is not what you think it is.
answered Nov 19 '18 at 13:11
Jayyf9Jayyf9
512
add a comment |
So I made 3 mistakes, first was if (AuthCookie === null), this should be undefined. The second mistake is that var AuthCookie is not updated after if (AuthCookie === undefined) so AuthCookie is not being updated to the new value. The last mistake is that the value should be in "" so (AuthCookie === "false").
The correct code working now:
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === undefined) {
console.log("null");
localStorage.setItem("auth", false);
}
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === "false") {
console.log("false");
}
else if (AuthCookie === "true") {
console.log("true");
}
else {
console.log("The cookie is set, but can't be read or has a different value");
}
answered Nov 22 '18 at 11:24
Jeff Jeff
8310
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Are you sure AuthCookie is null, perhaps it is undefined, although we can not know without showing where it is assigned to localStorage initially.
Try to work backwards when debugging, so start by console logging AuthCookie when calling the function so you can be sure it is assigned the value you expect. Otherwise go further back to where it is being assigned to localStorage and check the value there. We can not know for sure with the code provided but id say the value is not what you think it is.
answered Nov 19 '18 at 13:11
Jayyf9Jayyf9
512
add a comment |
Are you sure AuthCookie is null, perhaps it is undefined, although we can not know without showing where it is assigned to localStorage initially.
Try to work backwards when debugging, so start by console logging AuthCookie when calling the function so you can be sure it is assigned the value you expect. Otherwise go further back to where it is being assigned to localStorage and check the value there. We can not know for sure with the code provided but id say the value is not what you think it is.
answered Nov 19 '18 at 13:11
Jayyf9Jayyf9
512
add a comment |
Are you sure AuthCookie is null, perhaps it is undefined, although we can not know without showing where it is assigned to localStorage initially.
Try to work backwards when debugging, so start by console logging AuthCookie when calling the function so you can be sure it is assigned the value you expect. Otherwise go further back to where it is being assigned to localStorage and check the value there. We can not know for sure with the code provided but id say the value is not what you think it is.
answered Nov 19 '18 at 13:11
Jayyf9Jayyf9
512
Are you sure AuthCookie is null, perhaps it is undefined, although we can not know without showing where it is assigned to localStorage initially.
Try to work backwards when debugging, so start by console logging AuthCookie when calling the function so you can be sure it is assigned the value you expect. Otherwise go further back to where it is being assigned to localStorage and check the value there. We can not know for sure with the code provided but id say the value is not what you think it is.
answered Nov 19 '18 at 13:11
Jayyf9Jayyf9
512
answered Nov 19 '18 at 13:11
Jayyf9Jayyf9
512
answered Nov 19 '18 at 13:11
Jayyf9Jayyf9
512
answered Nov 19 '18 at 13:11
Jayyf9Jayyf9
512
512
add a comment |
add a comment |
So I made 3 mistakes, first was if (AuthCookie === null), this should be undefined. The second mistake is that var AuthCookie is not updated after if (AuthCookie === undefined) so AuthCookie is not being updated to the new value. The last mistake is that the value should be in "" so (AuthCookie === "false").
The correct code working now:
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === undefined) {
console.log("null");
localStorage.setItem("auth", false);
}
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === "false") {
console.log("false");
}
else if (AuthCookie === "true") {
console.log("true");
}
else {
console.log("The cookie is set, but can't be read or has a different value");
}
answered Nov 22 '18 at 11:24
Jeff Jeff
8310
add a comment |
So I made 3 mistakes, first was if (AuthCookie === null), this should be undefined. The second mistake is that var AuthCookie is not updated after if (AuthCookie === undefined) so AuthCookie is not being updated to the new value. The last mistake is that the value should be in "" so (AuthCookie === "false").
The correct code working now:
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === undefined) {
console.log("null");
localStorage.setItem("auth", false);
}
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === "false") {
console.log("false");
}
else if (AuthCookie === "true") {
console.log("true");
}
else {
console.log("The cookie is set, but can't be read or has a different value");
}
answered Nov 22 '18 at 11:24
Jeff Jeff
8310
add a comment |
So I made 3 mistakes, first was if (AuthCookie === null), this should be undefined. The second mistake is that var AuthCookie is not updated after if (AuthCookie === undefined) so AuthCookie is not being updated to the new value. The last mistake is that the value should be in "" so (AuthCookie === "false").
The correct code working now:
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === undefined) {
console.log("null");
localStorage.setItem("auth", false);
}
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === "false") {
console.log("false");
}
else if (AuthCookie === "true") {
console.log("true");
}
else {
console.log("The cookie is set, but can't be read or has a different value");
}
answered Nov 22 '18 at 11:24
Jeff Jeff
8310
So I made 3 mistakes, first was if (AuthCookie === null), this should be undefined. The second mistake is that var AuthCookie is not updated after if (AuthCookie === undefined) so AuthCookie is not being updated to the new value. The last mistake is that the value should be in "" so (AuthCookie === "false").
The correct code working now:
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === undefined) {
console.log("null");
localStorage.setItem("auth", false);
}
var AuthCookie = localStorage.getItem("auth");
if (AuthCookie === "false") {
console.log("false");
}
else if (AuthCookie === "true") {
console.log("true");
}
else {
console.log("The cookie is set, but can't be read or has a different value");
}
answered Nov 22 '18 at 11:24
Jeff Jeff
8310
answered Nov 22 '18 at 11:24
Jeff Jeff
8310
answered Nov 22 '18 at 11:24
Jeff Jeff
8310
answered Nov 22 '18 at 11:24
Jeff Jeff
8310
8310
add a comment |
add a comment |
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1
how and when are you calling checkLogin
– Shubham Khatri
Nov 19 '18 at 13:03
2
localStorage !== cookies. what you are trying to do?
– Dekel
Nov 19 '18 at 13:10
This code will always log something, providing
checkLoginis being called, and that there are no errors. So: are there any errors in the console? Are you surecheckLoginis being called? (You don't show us any code which calls it.)– Robin Zigmond
Nov 19 '18 at 13:20
@Dekel sorry, you are right. I first tried it with a cookie, but now am trying with localstorage.
– Jeff
Nov 19 '18 at 13:54