const testArray: string[] = [];
testArray[0].length
The current implementation does not trigger a TypeScript error. What can be done to properly handle cases where a string may not exist at a specific index?
const testArray: string[] = [];
testArray[0].length
The current implementation does not trigger a TypeScript error. What can be done to properly handle cases where a string may not exist at a specific index?
If you encounter this issue, one workaround is to set array items as possibly undefined:
const test: (string | undefined)[] = [];
test[0].length; // will result in an error
if(test[0]) {
test[0].length; // will work fine
}
Unfortunately, there doesn't seem to be an eslint rule specifically addressing this requirement.
Now, achieving this functionality is made feasible through the specific setting in tsconfig.json:
{
"compilerOptions": {
"ensureIndexAccessSafety": true
}
}
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