I want to retrieve data from a json file and then match it with the value of an existing variable and if the variable value matches the data in json it will display a message "a" and if it does not match it will display a message "b".
the json file is like this
["23435","87567", "34536","45234","34532","65365"]
What you want is to find a value in an array.
You can use includes
const array = ["23435","87567", "34536","45234","34532","65365"]
const aConstant = "23435"
return (<div>{ array.includes(aConstant) ? 'a' : 'b' }</div>)
Same thing with indexOf
const array = ["23435","87567", "34536","45234","34532","65365"]
const aConstant = "23435"
return (<div>{ array.indexOf(aConstant) !== -1 ? 'a' : 'b' }</div>)
You can also try filter
const array = ["23435","87567", "34536","45234","34532","65365"]
const aConstant = "23435"
return (<div>{ Boolean(array.filter( x => x === aConstant)) ? 'a' : 'b' }</div>)
And even find
const array = ["23435","87567", "34536","45234","34532","65365"]
const aConstant = "23435"
return (<div>{ array.find( x => x === aConstant) ? 'a' : 'b' }</div>)
Since this is not a proper JSON format file, you can load it in simply as a string:
import arrayFile from './arrayFile.txt';
Then, if your file is truly just an array hidden with nothing else, you can do something like this to get it into an array format:
const newArray = JSON.parse(arrayFile);
