html - Javascript: Remove last occurence of comma in span tag -


I object key result > And separated them with a comma, but I can not remove the last time of comma in the text. 

  Results: & lt; Span class = "result" & gt; & Lt; / Span & gt;

Javascript:

(key in obj) {$ ("result"). Attached (key + ","); }

Therefore, for example, instead of 1,2,3, it would be 1,2,3

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