template strings inside if statements

Question

is it correct syntax to use string literals inside if statements. please guide. how can i use categ dynamically in the function based on different values so that i dont have to write the same function for every button clicked.

const filterButtons= document.querySelectorAll(".filter-btn")

 let categ;

 filterButtons.forEach(function (btn) {
       
      
       

       btn.addEventListener("click",function (e) {
       if(e.currentTarget.dataset.id=="price") {
         categ = "price";
         console.log(categ);
       } 
       
       if(e.currentTarget.dataset.id=="discountPercentage") {
        categ = "discountPercentage";
        console.log(categ);
      }

      if(e.currentTarget.dataset.id=="rating") {
        categ = "rating";
        console.log(categ);
      }

    
      let newModData = [...mainProducts];

        let i=0;
        let j=0;
        let fixed = 0
        
        
     while(j< newModData.length-1) {
     
     while(i< newModData.length-1)
       {
         if(`newModData[i+1].${categ}`< `newModData[fixed].${categ}`)
           {
            const temp = Object.assign({}, newModData[fixed]);
            
            newModData[fixed] = newModData[i+1];
            newModData[i+1] = temp;
           }   
         i++;
     
       }
       i=j+1;
       fixed++;
       j++; 
     }   
     
     displayNew(newModData);  

       })

is it correct syntax to use string literals inside if statements. please guide. how can i use categ dynamically in the function based on different values so that i dont have to write the same function for every button clicked.

Firmino Changani · Answer

If newModData is an array of objects, then the correct syntax is:

if(newModData[i+1][categ] < newModData[fixed][categ]) {
 // Your logic here
}

To access properties of an object dynamically you must use brackets [] instead of dot .:

const prop = "name"; //

const someObj = {
  name: "Jane",
  age: 20
}

console.log(someObj[prop]); // --> Jane

template strings inside if statements

1 Answers