# TypoScript Coding Guidelines¶

## Directory and File Names¶

• As of TYPO3 8.7, the file ending can and should be .typoscript.
• TypoScript files are located in the directory <extension>/Configuration/TypoScript.
• File name for constants in static templates: constants.typoscript.
• File name for TypoScript in static templates: setup.typoscript.

• TypoScript files used to have the ending .txt.
• Since TYPO3 7, it is also possible to use the ending .ts. This is not recommended because it is also used by TypeScript.
• Therefore, you should use .typoscript if you are using TYPO3 8.7 and later.