React JS - How do I pass variables (parameters) to the API URL? - json

Question

I have a single page that consist of two dropdown-list components; The page is only accessible upon successful authentication (valid token). Both dropdown-list consumes it's data from different JSON-API's. I have one of the dropdown list functional, but for the other, the URL to it's API requires parameters.
Example URL:
http://buildingsAPI:111/api/buildings/
tested via postman with an id appended:
http://buildingsAPI:111/api/buildings/abcde-abce-abc2-111-2222
sample Json:
[
{
"abc_buildingid": "1111-2222-3333-aaa-1111117",
"abc_energyprogramid": "abcde-abce-abc2-111-2222",
"siteName": "Building 1",
"Available": false,
"clientName": "Client 1"
},
{
"abc_buildingid": "222-2222-3333-aaa-1111117",
"abc_energyprogramid": "xyz11-abce-abc2-111-2222",
"siteName": "Building 2",
"Available": false,
"clientName": "Client 2"
},
]
...am already obtaining the token upon user authentication (localStorage), but I also need to append/pass the abc_energyprogramid as a parameter to the API URL.
...the code:
constructor(props) {
super(props);
this.getToken = this.getToken.bind(this);
}
componentDidMount() {
const bearerToken = this.getToken();
fetch('http://buildingsAPI:111/api/buildings/?myparam1={abc_energyprogramid}', {
method: 'GET',
headers: {
'Content-type': 'application/json',
'Authorization': `Bearer ${bearerToken}`
},
})
.then(results => results.json())
.then(buildings => this.setState({ buildings: buildings }))
}
getToken() {
return localStorage.getItem('id_token');
}
render() {
console.log(this.state.buildings);
return(
<div>
<select className="custom-select" id="siteName">
{ this.state.buildings.map(item =>(
<option key={item.siteName}>{item.siteName}</option>
))
}
</select>
</div>
);
}
...I currently get an error:" Unhandled Rejection (SyntaxError):unexpected end of JSON input" on this line of the code: .then(results => results.json()). Could I get some help with this please?

Answer 1

I think the problem is the way you're referencing abc_energyprogramid
Change this:
fetch('http://buildingsAPI:111/api/buildings/?myparam1={abc_energyprogramid}')
to:
fetch(`http://buildingsAPI:111/api/buildings/?myparam1=${abc_energyprogramid}`)
Notice the back-ticks and ES6 template string literal.