您可以将数字存储在类型为Number的变量中，然后处理该值以找出每个位的值0/1。
一旦你有了这些信息，你就可以在处理过的信息上切换情况条件，寻址单个比特。
这里有一个演示，它将存储在register中的值作为22位值，并将返回一个数组，其中包含与寄存器中的位数一样多的值。一旦数组被返回，你就可以在它上面设置条件。例如，在演示中，我正在检查最高有效位是否设置为零。

function getIndividualBits(value) {
    
    //convert the number to a binary string representation
    let binaryStr = value.toString(2);
            
    // Convert the binary string to an array of integers, starting from the least significant bit
    let bitArray = Array.from(binaryStr).reverse().map(bit => parseInt(bit, 10));
    
    return bitArray;
}

//register value as number literal in binary
let register = 0b1111110001010101010000;
//get an array where at each index contains the value of the n-th bit (LSB is index zero)
let result = getIndividualBits(register);
//Expected output: [0,0,0,0,1,0,1,0,1,0,1,0,1,0,0,0,1,1,1,1,1,1]
console.log(result);  

//for example check if bit 22 (most significant) is zero => false
console.log( result[22] == 0 )

在这里，我使用getIndividualBits函数来帮助另一个函数，该函数将根据传递值中的第一个设置为1的位返回消息：

function getIndividualBits(value) {        
    let binaryStr = value.toString(2);    
    return Array.from(binaryStr).reverse().map(bit => parseInt(bit, 10));    
}

function checkFaults(value){

  const faultDescriptions = [
      //index: 0
      "The fault that has occured is: \n SHORT CIRCUIT DETECTED\n Please remove power, \n check wiring before resuming.",
      //index: 1
      "The fault that has occured is: \n DRIVE OVER TEMPERATURE \n Please remove power, \n increase air flow, add heatsink, \n or reduce duty cycle.",
      //index: 2
      "The fault that has occured is: \n OVER VOLTAGE \n Please remove power, \n DC bus above drive rating, \n Output shutdown.",
      //index: 3
      "The fault that has occured is: \n  UNDER VOLTAGE \n Please remove power, \n DC bus below minimum rating, \n check for drooping or collapsing, \n improve power source, reduce acceleration.",
      //index: 4
      "The fault that has occured is: \n MOTOR TEMPERATURE SENSOR \n ACTIVE \n Please remove power, \n check wiring and input voltage, \n reset and retry.",
      //index: 5
      "The fault that has occured is: \n FEEDBACK ERROR OR ENCODER \n POWER ERROR \n Please remove power, \n allow drive to cool down, \n reset and retry.",
      //index: 6
      "The fault that has occured is: \n MOTOR PHASING ERROR \n Please remove power, \n allow drive to cool down, \n reset and retry.",
      //index: 7
      "The fault that has occured is: \n CURRENT OUTPUT LIMITED \n Please remove power, \n allow drive to cool down \n reset and retry.",
      //index: 8
      "The fault that has occured is: \n VOLTAGE OUTPUT LIMITED \n Please remove power, \n allow drive to cool down \n reset and retry.",
      //index: 9
      "The fault that has occured is: \n POSITIVE LIMIT SWITCH ACTIVE \n Please remove power, \n allow drive to cool down \n reset and retry.",
      //index: 10
      "The fault that has occured is: \n NEGATIVE LIMIT SWITCH ACTIVE \n Please remove power, \n allow drive to cool down \n reset and retry."
  ];
  
  const defaultMsg = "Drive is operating without fault";
  
  const bits = getIndividualBits(value);
  //for each fault descriptions
  for(let i=0;i<faultDescriptions.length;i++){
    //if the bits value at that position is == 1
    if(bits[i] == 1)
      //return the corresponding description
      return faultDescriptions[i];
  }
  
  //if no faults where found, return the default case message
  return defaultMsg;
}

let register = 0b1111110001010101010000;
let msg = checkFaults(register);

console.log(msg);
//=> "MOTOR TEMPERATURE SENSOR" - index 4 corresponding to 4th LSB (zero based)