How to Fix: tslint / codelyzer / ng lint error: "for (... in ...) statements must be filtered with an if statement"
Learn how to fix: tslint / codelyzer / ng lint error: "for (... in ...) statements must be filtered with an if statement".
📋 Table of Contents
The error message indicates that the for (... in ...) statement should be filtered with an if statement. This is because the for-of loop does not support iterating over arrays or objects without filtering.
🔧 Proven Troubleshooting Steps
Method 1: Using the Object.keys() method
- Step 1: Replace the for (... in ...) statement with Object.keys(this.formErrors).forEach((key) => {
Method 2: Using a conditional operator
- Step 1: Replace the for (... in ...) statement with a conditional operator (condition && condition) to filter out empty keys.
✨ Wrapping Up
By applying these methods, you can resolve the tslint / codelyzer / ng lint error and ensure your code is linted correctly.
❓ Frequently Asked Questions
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