What is the "Function statement requires a name" syntax error?
The JavaScript exception SyntaxError - Function statement requires a name occurs when a function statement (or function declaration) requires a name but is not given one.
The SyntaxError object represents an error when trying to interpret syntactically invalid code. It is thrown when the JavaScript engine encounters tokens or a token order that does not conform to the syntax of the language when parsing code.
Instance Properties
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SyntaxError.prototype.message: Error message. Although ECMA-262 specifies thatSyntaxErrorshould provide its own message property, in SpiderMonkey it inheritsError.prototype.message. -
SyntaxError.prototype.name: Error name. This is inherited from Error. -
SyntaxError.prototype.fileName: Path to file that raised this error. This is inherited from Error. -
SyntaxError.prototype.lineNumber: Line number in file that raised this error. Inherited from Error. -
SyntaxError.prototype.columnNumber: Column number in line that raised this error. This is inherited from Error. -
SyntaxError.prototype.stack: Stack trace. This is inherited from Error.
Code
There is a function statement in the below code that is unnamed but requires a name, which will yield a SyntaxError. We will need to check how functions are defined and if we need to provide a name for it, if the function in question needs to be a function expression, or if the function code is placed correctly in the used context.
function () {return 'Hello world';}// SyntaxError: function statement requires a name
In order to solve this, we can use a function expression (assignment) instead. Basically, we will assign a name to our anonymous function.
let greet = function() {return 'Good Morning';};console.log(greet())
