Autocomplete #

Autocomplete is interesting because it executes many things at once. Just look at the source, the interesting part is trigger modifiers - it does something only if user typed something (rather than just navigated field with cursor keys) and then stopped for 100 ms.

When autocomplete triggers a time-consuming operation (e.g. full-text search), the implementation above triggers numerous requests if the user types slow enough. If requests finish at different durations, an older request can override the latest. To avoid this, we need to abort the XHR using ts-req-strategy="last".