Calculator/script.js at main · mudassir523/Calculator · GitHub

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const display = document.querySelector('#display')

const buttons = document.querySelectorAll('button')

buttons.forEach((item)=>{
    item.onclick = ()=>{
        if(item.id=='clear'){
            display.innerText =''
        }
        else if(item.id=='backspace'){
              let string = display.innerText.toString()
              display.innerText = string.substr(0, string.length-1)

        }
        else if (display.innerText!='' && item.id == '='){
            display.innerText = eval(display.innerText)
        }
        else if(display.innerText=='' && item.id=='='){
            display.innerText ='please Enter Something to Calculator'
        }
        else{
            display.innerText+= item.id
        }
    }
})