My react code:
fetch("http://localhost:8080/getnames")
.then(response => response.text())
.then(data => {
alert("data: "+data);
alert("index: "+data.indexOf(value));
data.indexOf(value) === -1 ? callback() : callback("DuplicateName")
})
if array is ["abc","def"]
then data.indexOf("a")
is > -1
. Why? How to resolve this
What I want is exact match. how to accomplish that?
If the response is JSON, you have to parse it. You should use response.json()
method instead of response.text()
:
fetch("http://localhost:8080/getnames")
.then(response => response.json())
.then(data => {
alert("data: "+data);
alert("index: "+data.indexOf(value));
data.indexOf(value)===-1?callback():callback("DuplicateName")
})