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hoist(Noun) A hoisting device, such as pulley or crane. hoist(Noun) The perpendicular height of a flag, as opposed to the fly, or horizontal length, when flying from a staff. hoist(Noun) The vertical edge of a flag which is next to the staff. hoist(Noun) The height of a fore-and-aft sail, next the mast or stay.
var bar = function() { return 3; }; The left hand side (var bar) is a Variable Declaration. Variable Declarations get hoisted but their Assignment Expressions donât. So when bar is hoisted the interpreter initially sets var bar = undefined. The function definition itself is not hoisted.