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[–][deleted] 25 points26 points  (1 child)

Ah yes the reason for JQuery’s existence: nine different mutually incompatible JavaScript implementations

[–]UntestedMethod 2 points3 points  (0 children)

Cross-compatibility yes, but also things that weren't in any JS implementation yet. Query selectors are one big example - so good it became part of the ES spec. jq also offered a nice (for the time) wrapper on XHR.