javascript - angular error not sure why its happening -


  • i new js , anguar 2
  • i getting below error when move 3 dots in grid.
  • can tell me how fix it.

  • providing whole code in fiddle , relevant code below.

          this.sportsdata.lockcolumn(laptop); 
typeerror: cannot read property 'locked' of undefined     @ init.reordercolumn (kendo.all.min.js:49)     @ init.lockcolumn (kendo.all.min.js:49)     @ swimmingdocuments.lockkgridcolumns (ball-bat.ts:863)     @ swimmingdocuments.collectuserdraggedcolumns (ball-bat.ts:847)     @ htmldocument.eval (ball-bat.ts:811)     @ htmldocument.dispatch (jquery-2.2.3.js:4737)     @ htmldocument.elemdata.handle (jquery-2.2.3.js:4549)     @ zonedelegate.invoketask (zone.js:236)     @ object.oninvoketask (core.umd.js:6233)     @ zonedelegate.invoketask (zone.js:235)     gym(remote, running): void {     if (remote.length <= 0) {       return;     }     this.sportsdata = $('#' + running).data("kendogrid");     let jump = $('#' + running + ' .k-grid-header > div > table > thead > tr:first-child > th');     let high = jump.length;     (let = 0; < high; i++) {       let laptop = jump.eq(i).attr('data-field');       let bed = typeof laptop;       if (bed == "string" && laptop != undefined) {         if (($.inarray(laptop, remote) !== -1 && jump.eq(i).css('display') != 'none') || laptop == 'locksetcolumn' || laptop == 'contextrow') {           this.sportsdata.lockcolumn(laptop);         } else {           this.sportsdata.unlockcolumn(laptop);         }        }     }


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