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).

edited Nov 21 '18 at 7:59

Ignacio Soler Garcia

12.1k20100174

asked Nov 20 '18 at 13:53

Miguel Angel

4219

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

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).

edited Nov 21 '18 at 7:59

Ignacio Soler Garcia

12.1k20100174

asked Nov 20 '18 at 13:53

Miguel Angel

4219

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

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).

edited Nov 21 '18 at 7:59

Ignacio Soler Garcia

12.1k20100174

asked Nov 20 '18 at 13:53

Miguel 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

edited Nov 21 '18 at 7:59

Ignacio Soler Garcia

12.1k20100174

asked Nov 20 '18 at 13:53

Miguel Angel

4219

edited Nov 21 '18 at 7:59

Ignacio Soler Garcia

12.1k20100174

asked Nov 20 '18 at 13:53

Miguel 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

asked Nov 20 '18 at 13:53

Miguel Angel

4219

asked Nov 20 '18 at 13:53

Miguel Angel

4219

asked Nov 20 '18 at 13:53

Miguel Angel

4219

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

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 |

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

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 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

add a comment |

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