addEventListener(), removeEventListener(), event, click, submit, keydown, keyup, change, input, mouseover, mouseout, preventDefault(), stopPropagation(), target, event delegation, function, return, arguments, arrow function, callback, anonymous function, default parameters, parameters, closure, length, charAt(), indexOf(), lastIndexOf(), substring(), slice(), replace(), toUpperCase(), toLowerCase(), trim(), push(), pop(), shift(), unshift(), splice(), slice(), length, map(), filter(), reduce(), forEach(), find(), indexOf(), includes(), concat()

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