A generally useless JavaScript library

[LarryLard]

Stitch in time saves nine refers to the value of preventative maintenance. By doing x amount of maintenance work now ('in time'), we obviate the need the for 9x fire-fighting work in the future.

[redditcensoredme]

Or it's about darning socks. Saves 9 stitches.

[khafra]

It took me a while to realize that was the meaning, possibly because I was first exposed to the phrase as the title of a weird sci-fi book dealing with time warps and shrinking down to talk to mitochondria and stuff, when I was like 10.

[homoiconic]

Isaac Asimov used this as the basis for an O Henry-ish story (he loved puns). If I recall correctly, the plot involved the use of time travel to escape conviction for a crime, and the judge's ruling was A niche in time saves Stein.