Stretchy makes form element autosizing the way it should be, meaning that every text element box in your design expands to fit text inputs beautifully. (Everybody likes when things just happen automatically, right?)
Stretchy has a spartan API, since in most cases you don’t need to call it at all. Stretchy works via event delegation and detects new elements via mutation observers, so you do not need to call any API methods for adding new elements via scripting (e.g. AJAX), but if you do need API methods, they are available in the documentation.
To use, just include the script anywhere in the website and you are ready to go!