Sometimes, we may run into the ‘SyntaxError: function statement requires a name’ when we’re developing JavaScript apps.
In this article, we’ll look at how to fix the ‘SyntaxError: function statement requires a name’ when we’re developing JavaScript apps.
Fix the ‘SyntaxError: function statement requires a name’ When Developing JavaScript Apps
To fix the ‘SyntaxError: function statement requires a name’ when we’re developing JavaScript apps, we should make sure that our function declarations has a function name in it.
On Edge, the error message for this error is Syntax Error: Expected identifier.
On Firefox, the error message for this error is SyntaxError: function statement requires a name.
And on Chrome, the error message for this error is SyntaxError: Unexpected token.
Therefore, the following code will throw the error:
function () {
return 'Hello world';
}
Instead, we should write:
function greet () {
return 'Hello world';
}
or:
const greet = function() {
return 'Hello world';
};
We can also use an anonymous function in an IIFE:
(function () {
return 'Hello world';
})()
Also, we should make sure that our callbacks don’t have syntax errors in them.
So instead of writing:
promise.then(
function() {
console.log("success");
});
function() {
console.log("error");
}
which has misplaced parentheses, we write:
promise.then(
function() {
console.log("success");
},
function() {
console.log("error");
}
);
Conclusion
To fix the ‘SyntaxError: function statement requires a name’ when we’re developing JavaScript apps, we should make sure that our function declarations has a function name in it.
On Edge, the error message for this error is Syntax Error: Expected identifier.
On Firefox, the error message for this error is SyntaxError: function statement requires a name.
And on Chrome, the error message for this error is SyntaxError: Unexpected token.
