运行测试时，React App冻结浏览器页面

如何解决运行测试时，React App冻结浏览器页面

我是React的新手，目前正在使用具有React框架的基本功能的计算器应用程序。这是freecodecamp的前端库项目的一部分。我的代码可以正常工作，因为它可以进行所有计算，但是每次尝试运行测试时，网页都会冻结。这是我的代码；

class Calculator extends React.Component{
  constructor(props){
    super(props)
    this.state = {
      display: "0",clickedNumber: false,clickedOperator: false,clickedDecimal: false,}
  
   this.handleClear = this.handleClear.bind(this)
   this.inputNums = this.inputNums.bind(this)
   this.doEquals = this.doEquals.bind(this)
   this.inputOperator = this.inputOperator.bind(this)
   this.inputDecimal = this.inputDecimal.bind(this)
  }

  handleClear(){
    this.setState({display: "0",clickedDecimal: false})
  }
 
  inputNums(Buttons){
    if(!this.state.clickedNumber && Buttons.target.innerText !== "0")
    {this.setState({display: Buttons.target.innerText,clickedNumber: true,clickedDecimal: false})}

    else if(this.state.clickedNumber){
      this.setState({display: this.state.display + Buttons.target.innerText,})
    }
  }
  inputOperator(operator){
  if(!this.state.clickedOperator){
    this.setState({
    display:  this.state.display + operator.target.innerText,clickedDecimal: false })
  }

  }

  inputDecimal(decimal){
    if(!this.state.clickedDecimal){
      this.setState({
        display: this.state.display + decimal.target.innerText,clickedDecimal: true,clickedOperator:false
      })
    }
  }
doEquals(){
  function makingRequestedOperation(arr,operIndex,oper){
    let num1 = [];
    let num2=[];
    let info = {
       
    }
    let result;
    for(var j = parseInt(operIndex)-1; j>-1; j--){
      if(!isNaN(arr[j]) || arr[j] === "."){
         num1.push(arr[j]);
         info.firstNumIndex = j;
       }else if(isNaN(arr[j]) && arr[j] !== "."){
         break;
       }
     }
    num1.reverse();
    for(var i = parseInt(operIndex)+1; i<arr.length; i++){
       if(!isNaN(arr[i]) || arr[i] === "."){
         num2.push(arr[i]);
         info.lastNumIndex = i;
       }else if(isNaN(arr[i]) && arr[i] !== "."){
         break;
       }
     }
    const deleteCount = num1.concat(oper,num2);
    let operator1 = num1.join("");
    let operator2 = num2.join("");
    if(oper==="+"){
      result = parseFloat(operator1) + parseFloat(operator2);
    }else if(oper ==="-"){
      result = parseFloat(operator1) - parseFloat(operator2)
    }else if(oper ==="*"){
      result = parseFloat(operator1) * parseFloat(operator2);
    }else if(oper ==="/"){
      result = parseFloat(operator1) / parseFloat(operator2);
    }
    info.result = result;
     arr.splice(info.firstNumIndex,deleteCount.length,info.result);
    return arr;
  }
  let arr = this.state.display.split("");
  while(arr.length>1){
  let sumIndex = arr.indexOf("+");
  let divIndex = arr.indexOf("/");
  let multIndex = arr.indexOf("*");
  let subIndex = arr.indexOf("-")
  if(divIndex > 0 && multIndex >0){
    if(divIndex < multIndex){
      arr = makingRequestedOperation(arr,divIndex,"/");
    }else{
      arr = makingRequestedOperation(arr,multIndex,"*");
    }
  }else{
    if(divIndex > 0){
      arr = makingRequestedOperation(arr,"/");
    }else if(multIndex >0){
      arr = makingRequestedOperation(arr,"*");
    }else if(sumIndex >0 && subIndex > 0){
      if(sumIndex < subIndex){
        arr = makingRequestedOperation(arr,sumIndex,"+");  
      }else{
        arr = makingRequestedOperation(arr,subIndex,"-");  
      }
      
    }else if(subIndex >0){
         arr = makingRequestedOperation(arr,"-");
    }else{
      arr = makingRequestedOperation(arr,"+");
    }
  }
}
  
arr = Math.round(arr*100000)/100000;  
 

this.setState({
 display: arr.toString()
})

}
 
  render(){
    const buttonsData = 
    [{id:"zero",value: "0"},{id:"one",value: "1"},{id:"two",value: '2'},{id:"three",value: "3"},{id:"four",value: "4"},{id:"five",value: "5"},{id:"six",value: "6"},{id:"seven",value: "7"},{id:"eight",value: "8"},{id:"nine",value: "9"}];

    const operators = [{
      id:"add",value: "+"},{ id:"subtract",value: "-"
    },{id:"multiply",value: "*"},{id:"divide",value: "/"}]
    return(
    <div className = "App">
      <Display
        display = {this.state.display}
        />

       {buttonsData.map((data)   =>  
       (<Buttons
       id = {data.id}
       name = {data.value} 
       key = {data.id}
       onClick = {this.inputNums}                                    
       />
       )) }

<Buttons
    id = "decimal"
    onClick = {this.inputDecimal}
    name = "."
    />

   {operators.map((operator) =>(<Buttons 
      id = {operator.id}
      name = {operator.value}
      key = {operator.id}
      onClick = {this.inputOperator}
      />))}

<Buttons 
id= "equals"
name = "="
onClick = {this.doEquals}
/>

    <Buttons
    id = "clear"
    onClick = {this.handleClear}
    name = "Clear"
    />
    </div>
    

    )
  }
}

我认为问题可能出在doEquals函数上，但无法解决。我该如何解决这个问题？