Then I learned these 5 techniques. Now I can't imagine coding without them.
Here's what changed everything:
𝐔𝐬𝐞 "𝐬𝐚𝐭𝐢𝐬𝐟𝐢𝐞𝐬" 𝐈𝐧𝐬𝐭𝐞𝐚𝐝 𝐨𝐟 𝐓𝐲𝐩𝐞 𝐀𝐬𝐬𝐞𝐫𝐭𝐢𝐨𝐧𝐬
• This simple switch changed everything for me.
• You get type checking WITHOUT losing the literal types.
• Game changer for autocomplete and refactoring.
𝐓𝐞𝐦𝐩𝐥𝐚𝐭𝐞 𝐋𝐢𝐭𝐞𝐫𝐚𝐥 𝐓𝐲𝐩𝐞𝐬 𝐟𝐨𝐫 𝐒𝐭𝐫𝐢𝐧𝐠 𝐕𝐚𝐥𝐢𝐝𝐚𝐭𝐢𝐨𝐧
• Instead of accepting any string, I now validate patterns at compile time.
• Result: Caught 12 bugs before they hit production.
• TypeScript now validates string patterns automatically.
𝐃𝐢𝐬𝐜𝐫𝐢𝐦𝐢𝐧𝐚𝐭𝐞𝐝 𝐔𝐧𝐢𝐨𝐧𝐬 𝐟𝐨𝐫 𝐒𝐭𝐚𝐭𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭
• This pattern eliminated 90% of my "undefined is not an object" errors.
• TypeScript automatically narrows types based on the status.
• No more checking if data exists everywhere.
𝐔𝐬𝐞 "𝐮𝐧𝐤𝐧𝐨𝐰𝐧" 𝐈𝐧𝐬𝐭𝐞𝐚𝐝 𝐨𝐟 "𝐚𝐧𝐲"
• Switching from any to unknown forced me to handle errors properly.
• Impact: Reduced runtime errors by 40% in our production app.
• This one change made my code so much safer.
𝐂𝐨𝐧𝐬𝐭 𝐀𝐬𝐬𝐞𝐫𝐭𝐢𝐨𝐧𝐬 𝐟𝐨𝐫 𝐈𝐦𝐦𝐮𝐭𝐚𝐛𝐥𝐞 𝐎𝐛𝐣𝐞𝐜𝐭𝐬
• Adding "as const" creates literal types and makes everything read-only.
• Now I get perfect autocomplete and prevent accidental mutations.
• Simple but incredibly powerful.
TypeScript isn't just about catching errors it's about writing code with confidence.
What's your favorite TypeScript feature that boosted your productivity?
Top comments (0)