javascript - why calling a function within object markup is valid? -


can please explain me how valid? never seen nor expected valid.

https://gist.github.com/martinaglv/0cf3f564d9c31c053da5#file-13-js

function whatdoesitdo(){        var values = [];            myblock: {          values.push('1');          values.push('2');          break myblock;          values.push('3');      }            values.push('4');            return values.join(',');  }

funny enough, thing (myblock) code label, old tool used give names code blocks. used while coding, like, assembly when using jump instructions , such. used in order use functions 'goto' (don't it's evil!!).

so, in here block called "myblock" inserts elements array. break means code stop executing in block (that's why 2 elements in array there).

later, after '4' inserted, join method turns array string made array's elements, joined "," delimiter. (so becomes "1,2,4") , that's return value


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