By returning early from a method, we can reduce the nested conditions and make code more readable.
Examples
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function anyMethod (object) {
if (object) {
let token = localStorage.getItem("token");
if(token){
localStorage.setItem(`${token}_valid`, true);
return token;
}
else {
localStorage.setItem('token', "default-token")
return;
}
}
return;
}
The above can be written as
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function anyMethod (object) {
if (!object) return; // Avoiding nested condtions by returning early
let token = localStorage.getItem('token');
if(token){
localStorage.setItem(`${token}_valid`, true);
return token;
}
else {
localStorage.setItem('token', "default-token")
return;
}
}
which is more readable.