Sometimes, we may run into the ‘SyntaxError: missing = in const declaration’ when we’re developing JavaScript apps.
In this article, we’ll look at how to fix the ‘SyntaxError: missing = in const declaration’ when we’re developing JavaScript apps.
Fix the ‘SyntaxError: missing = in const declaration’ When Developing JavaScript Apps
To fix the ‘SyntaxError: missing = in const declaration’ when we’re developing JavaScript apps, we should make sure we assign a value to any variable that’s declared with const when they’re declared.
On Edge, the error message for this error is SyntaxError: Const must be initialized.
On Firefox, the error message for this error is SyntaxError: missing = in const declaration.
And on Chrome, the error message for this error is SyntaxError: Missing initializer in const declaration.
Therefore, the following code will throw the error:
const COLUMNS;
To fix this, we write:
const COLUMNS = 100;
However, we don’t have to assign a value to a variable declared with let when they’re declared, so:
let columns;
won’t throw the error.
Conclusion
To fix the ‘SyntaxError: missing = in const declaration’ when we’re developing JavaScript apps, we should make sure we assign a value to any variable that’s declared with const when they’re declared.
On Edge, the error message for this error is SyntaxError: Const must be initialized.
On Firefox, the error message for this error is SyntaxError: missing = in const declaration.
And on Chrome, the error message for this error is `SyntaxError: Missing initializer in const declaration.
