> For the complete documentation index, see [llms.txt](https://lwin-moe-paing.gitbook.io/typescript-baby-by-lwin-moe-paing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lwin-moe-paing.gitbook.io/typescript-baby-by-lwin-moe-paing/basic-typescript/ts-predefined-and-index.md).

# TS - Predefined & Index

<figure><img src="https://4062235122-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F7tekcoDYDaKhlNreT5uK%2Fuploads%2F7sGGRai8moEkyLP7TBjj%2FTypescript%20Predefined%20Indexing%20Syntax.png?alt=media&amp;token=0c074ae7-c695-4c6b-aa58-19da98cb8a71" alt=""><figcaption></figcaption></figure>

TypeScript မှာ Index Signature ကိုသုံးပြီး Object တစ်ခုအတွင်း predefined properties တွေကိုသတ်မှတ်နိုင်ပါတယ် ။

<figure><img src="https://4062235122-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F7tekcoDYDaKhlNreT5uK%2Fuploads%2FuseWaDyFwavsXqGwVtyb%2FTypescript%20Predefined%20Indexing%20Code.png?alt=media&amp;token=9c4dd0e9-a649-46a1-a7ab-a206aff4eff0" alt=""><figcaption></figcaption></figure>

StringObj ထဲမှာ KeyType string ရယ် ValueType string ဖြစ်တဲ့အပြင် ၊&#x20;

`name` property နဲ့ `address` property ပါကိုပါရမယ်လို့ Predefined လုပ်ထားတာဖြစ်ပါတယ် ။