Check out example codes for "object notation string javascript\". It will help you in understanding the concepts better.

Code Example 1

function getValueFromNotation(obj: Object,is: string|any[], value: any = undefined) {
    
    if (typeof is == 'string')
      return getValueFromNotation(obj,is.split('.'), value);
    else if (is.length==1 && value!==undefined)
      return obj[is[0]] = value;
    else if (is.length==0)
      return obj;
    else
      return getValueFromNotation(obj[is[0]],is.slice(1), value);
  
}

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