Mixing
String comparison not working in Javascript when comparing an environment variable with a constant
We have a simple React application, created with CRA 1.x.
We installed dotenv to use environment variables on the project and our variables are included on the .env and .env.development files like this:
.env
REACT_APP_LOGGER=LOGGER
.env.development
REACT_APP_LOGGER=NO_LOGGER
Then in the code we have this logic:
if(process.env.REACT_APP_LOGGER === "LOGGER") {
// do something
}
On local builds with webpack 4 in development mode the if is true, and on production mode is false.
But on azure, in both cases is false
process.env.REACT_APP_LOGGER === "LOGGER" // false
We have checked the value of process.env.REACT_APP_LOGGER and it is "LOGGER" type of string but the code is returning weird values:
console.log(process.env.REACT_APP_LOGGER)
console.log(process.env.REACT_APP_LOGGER === "LOGGER")
console.log(process.env.REACT_APP_LOGGER == "LOGGER")
console.log(typeof process.env.REACT_APP_LOGGER)
This is the output generated by the previous code:
LOGGER
false
false
string
Is there something I´m doing wrong? The weird part is that we have other string comparisons like this one and they are comparing correctly.
process.env.NODE_ENV === "production" // true
EDIT: When we look at the transpiled code we see the following:
console.log("LOGGER"),
console.log(!1),
console.log(!1),
console.log(f("LOGGER"));
So I guess that means the comparison is done during build time (and as this is a constant it makes sense).
javascript node.js environment-variables
edited Nov 21 '18 at 7:59
Ignacio Soler Garcia
12.1k20100174
asked Nov 20 '18 at 13:53
Miguel AngelMiguel Angel
4219
add a comment |
We have a simple React application, created with CRA 1.x.
We installed dotenv to use environment variables on the project and our variables are included on the .env and .env.development files like this:
.env
REACT_APP_LOGGER=LOGGER
.env.development
REACT_APP_LOGGER=NO_LOGGER
Then in the code we have this logic:
if(process.env.REACT_APP_LOGGER === "LOGGER") {
// do something
}
On local builds with webpack 4 in development mode the if is true, and on production mode is false.
But on azure, in both cases is false
process.env.REACT_APP_LOGGER === "LOGGER" // false
We have checked the value of process.env.REACT_APP_LOGGER and it is "LOGGER" type of string but the code is returning weird values:
console.log(process.env.REACT_APP_LOGGER)
console.log(process.env.REACT_APP_LOGGER === "LOGGER")
console.log(process.env.REACT_APP_LOGGER == "LOGGER")
console.log(typeof process.env.REACT_APP_LOGGER)
This is the output generated by the previous code:
LOGGER
false
false
string
Is there something I´m doing wrong? The weird part is that we have other string comparisons like this one and they are comparing correctly.
process.env.NODE_ENV === "production" // true
EDIT: When we look at the transpiled code we see the following:
console.log("LOGGER"),
console.log(!1),
console.log(!1),
console.log(f("LOGGER"));
So I guess that means the comparison is done during build time (and as this is a constant it makes sense).
javascript node.js environment-variables
edited Nov 21 '18 at 7:59
Ignacio Soler Garcia
12.1k20100174
asked Nov 20 '18 at 13:53
Miguel AngelMiguel Angel
4219
Tryprocess.env.REACT_APP_LOGGER.lengthand let me know what's the output. I think you've spaces
– Ritwick Dey
Nov 20 '18 at 18:01
Tryconsole.log(JSON.stringify(process.env.REACT_APP_LOGGER))to make sure
– Bergi
Nov 20 '18 at 18:09
The solution was pass both to stringify, like this:JSON.stringify(process.env.REACT_APP_LOGGER) === JSON.stringify("LOGGER")
– Miguel Angel
Dec 1 '18 at 8:20
add a comment |
We have a simple React application, created with CRA 1.x.
We installed dotenv to use environment variables on the project and our variables are included on the .env and .env.development files like this:
.env
REACT_APP_LOGGER=LOGGER
.env.development
REACT_APP_LOGGER=NO_LOGGER
Then in the code we have this logic:
if(process.env.REACT_APP_LOGGER === "LOGGER") {
// do something
}
On local builds with webpack 4 in development mode the if is true, and on production mode is false.
But on azure, in both cases is false
process.env.REACT_APP_LOGGER === "LOGGER" // false
We have checked the value of process.env.REACT_APP_LOGGER and it is "LOGGER" type of string but the code is returning weird values:
console.log(process.env.REACT_APP_LOGGER)
console.log(process.env.REACT_APP_LOGGER === "LOGGER")
console.log(process.env.REACT_APP_LOGGER == "LOGGER")
console.log(typeof process.env.REACT_APP_LOGGER)
This is the output generated by the previous code:
LOGGER
false
false
string
Is there something I´m doing wrong? The weird part is that we have other string comparisons like this one and they are comparing correctly.
process.env.NODE_ENV === "production" // true
EDIT: When we look at the transpiled code we see the following:
console.log("LOGGER"),
console.log(!1),
console.log(!1),
console.log(f("LOGGER"));
So I guess that means the comparison is done during build time (and as this is a constant it makes sense).
javascript node.js environment-variables
edited Nov 21 '18 at 7:59
Ignacio Soler Garcia
12.1k20100174
asked Nov 20 '18 at 13:53
Miguel AngelMiguel Angel
4219
We have a simple React application, created with CRA 1.x.
We installed dotenv to use environment variables on the project and our variables are included on the .env and .env.development files like this:
.env
REACT_APP_LOGGER=LOGGER
.env.development
REACT_APP_LOGGER=NO_LOGGER
Then in the code we have this logic:
if(process.env.REACT_APP_LOGGER === "LOGGER") {
// do something
}
On local builds with webpack 4 in development mode the if is true, and on production mode is false.
But on azure, in both cases is false
process.env.REACT_APP_LOGGER === "LOGGER" // false
We have checked the value of process.env.REACT_APP_LOGGER and it is "LOGGER" type of string but the code is returning weird values:
console.log(process.env.REACT_APP_LOGGER)
console.log(process.env.REACT_APP_LOGGER === "LOGGER")
console.log(process.env.REACT_APP_LOGGER == "LOGGER")
console.log(typeof process.env.REACT_APP_LOGGER)
This is the output generated by the previous code:
LOGGER
false
false
string
Is there something I´m doing wrong? The weird part is that we have other string comparisons like this one and they are comparing correctly.
process.env.NODE_ENV === "production" // true
EDIT: When we look at the transpiled code we see the following:
console.log("LOGGER"),
console.log(!1),
console.log(!1),
console.log(f("LOGGER"));
So I guess that means the comparison is done during build time (and as this is a constant it makes sense).
javascript node.js environment-variables
javascript node.js environment-variables
edited Nov 21 '18 at 7:59
Ignacio Soler Garcia
12.1k20100174
asked Nov 20 '18 at 13:53
Miguel AngelMiguel Angel
4219
edited Nov 21 '18 at 7:59
Ignacio Soler Garcia
12.1k20100174
asked Nov 20 '18 at 13:53
Miguel AngelMiguel Angel
4219
edited Nov 21 '18 at 7:59
Ignacio Soler Garcia
12.1k20100174
edited Nov 21 '18 at 7:59
Ignacio Soler Garcia
12.1k20100174
edited Nov 21 '18 at 7:59
Ignacio Soler Garcia
12.1k20100174
12.1k20100174
asked Nov 20 '18 at 13:53
Miguel AngelMiguel Angel
4219
asked Nov 20 '18 at 13:53
Miguel AngelMiguel Angel
4219
asked Nov 20 '18 at 13:53
Miguel AngelMiguel Angel
4219
4219
Tryprocess.env.REACT_APP_LOGGER.lengthand let me know what's the output. I think you've spaces
– Ritwick Dey
Nov 20 '18 at 18:01
Tryconsole.log(JSON.stringify(process.env.REACT_APP_LOGGER))to make sure
– Bergi
Nov 20 '18 at 18:09
The solution was pass both to stringify, like this:JSON.stringify(process.env.REACT_APP_LOGGER) === JSON.stringify("LOGGER")
– Miguel Angel
Dec 1 '18 at 8:20
add a comment |
Tryprocess.env.REACT_APP_LOGGER.lengthand let me know what's the output. I think you've spaces
– Ritwick Dey
Nov 20 '18 at 18:01
Tryconsole.log(JSON.stringify(process.env.REACT_APP_LOGGER))to make sure
– Bergi
Nov 20 '18 at 18:09
The solution was pass both to stringify, like this:JSON.stringify(process.env.REACT_APP_LOGGER) === JSON.stringify("LOGGER")
– Miguel Angel
Dec 1 '18 at 8:20
Try
process.env.REACT_APP_LOGGER.length and let me know what's the output. I think you've spaces– Ritwick Dey
Nov 20 '18 at 18:01
Try
process.env.REACT_APP_LOGGER.length and let me know what's the output. I think you've spaces– Ritwick Dey
Nov 20 '18 at 18:01
Try
console.log(JSON.stringify(process.env.REACT_APP_LOGGER)) to make sure– Bergi
Nov 20 '18 at 18:09
Try
console.log(JSON.stringify(process.env.REACT_APP_LOGGER)) to make sure– Bergi
Nov 20 '18 at 18:09
The solution was pass both to stringify, like this:
JSON.stringify(process.env.REACT_APP_LOGGER) === JSON.stringify("LOGGER")– Miguel Angel
Dec 1 '18 at 8:20
The solution was pass both to stringify, like this:
JSON.stringify(process.env.REACT_APP_LOGGER) === JSON.stringify("LOGGER")– Miguel Angel
Dec 1 '18 at 8:20
add a comment |
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Try
process.env.REACT_APP_LOGGER.lengthand let me know what's the output. I think you've spaces– Ritwick Dey
Nov 20 '18 at 18:01
Try
console.log(JSON.stringify(process.env.REACT_APP_LOGGER))to make sure– Bergi
Nov 20 '18 at 18:09
The solution was pass both to stringify, like this:
JSON.stringify(process.env.REACT_APP_LOGGER) === JSON.stringify("LOGGER")– Miguel Angel
Dec 1 '18 at 8:20