javascript - Only get Object of boxes when using QuaggaJS -

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i using quaggajs. when move barcode in front of camera, results got object of boxes below instead of complete results.

i tried figure out, failed. may cause this? thanks

{   "boxes": [     [       [77.4074243622672, 410.9288668804402],       [0.050203235235130705, 310.53619724086366],       [360.15706727788256, 33.05711026051813],       [437.5142884049146, 133.44977990009465]     ],     [       [248.90769330706507, 415.2041489551161],       [198.9532321622869, 352.62160512937635],       [339.546160777576, 240.3979259789976],       [389.5006219223542, 302.98046980473737]     ]   ] }

the codes here:

quagga.init({     inputstream : {       name : "live",       type : "livestream",       target: document.queryselector('#myvideo')     },     decoder : {       readers : ["code_128_reader"]     }   }, function(err) {       if (err) {           console.log(err);           return       }       console.log("initialization finished. ready start");       quagga.start();        quagga.onprocessed(res => {         console.log(res);  // here got object of boxes       })   });


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