implement-stack-with-array/index.html at master · Stevepurpose/implement-stack-with-array · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="style.css">
    <title>Stack Implent Using Array</title>
</head>
<body>
    <h1>Stack Implementation using an Array<hr></h1>
    <div id="demo">
    <p id="instruct">Enter value in box and click on any button below to perform whatever action you want to implement on stack</p>
    <ul>
    <li>push</li>
      <li>pop</li>
      <li>peek</li>
      <li>isEmpty</li>
      <li>size</li>
   <li>clear</li>
   <li>display</li>

   </ul>
    </div>

    <div class="choices">
       <button id="but1">push</button>
       <button id="but2">pop</button>
         <button id="but3">display</button>
          <button id="but4">peek</button>
         <button id="but5">isEmpty</button>
           <button id="but6">size</button>
            <button id="but7" >clear</button>

    </div>

    <div class="visual">
    <p id="toread"></p>
     <div id="showstack">

    </div>

    </div>


    <div class="show">
    <input id="toadd" type="text" placeholder="enter value to push">

    </div>


    <script>
    let choices=document.querySelector(".choices")
    let visual=document.querySelector(".visual")

    var toread=document.getElementById("toread")

    var show=document.querySelector(".show")


   var button=document.querySelector("button")

   var showstack=document.getElementById("showstack")

//var toadd=document.getElementById ("toadd")


var toadd=document.getElementById("toadd").value


        class Stack {
        constructor() {
            this.items = [];
            this.top = -1;
        }
    }

   //instantiate
   let stackup = new Stack()


/*code for push*/
stackup.push = function (toadd) {
        this.items[this.top] =toadd
        this.top += 1
    }

    /*code for display */
stackup.display = function () {
        if (this.top < 0) {
            return "Stack is empty"
        }
        else{
        showstack.innerHTML="items on stack are:<br/>"
        for (let i =this.top-1; i>-2; i--) {
      showstack.innerHTML += this.items[i] + " <br />"
        }
        }


    }

/*code for pop*/

    stackup.pop = function () {
        if (this.top < 0) {
     return "no elements left"
        }
        else{
      var temp= this.items[this.top-1]
        //--this.items.length
        //return temp
       this.top-=1
        return temp
    }


    }
 /*code for peek*/
 stackup.peek=function(){
     if(this.top<0){
         toread.innerHTML="stack is empty"
     }
     else{
   var temp=this.items[this.top-1]
     return temp
 }


 }

 /*code for isEmpty*/
 stackup.isEmpty=function(){
     if(this.top<0){
         showstack.innerHTML=true
     }
     else{
      showstack.innerHTML=false
     }
 }


//code for size
   stackup.size=function(){

      var trav=0
      while(trav<=this.top){


          trav+=1
      }

   toread.innerHTML=trav +" "+ "is the size of stack"
   }


   //for clear

   stackup.clear=function(){
   this.top=-1
   toread.innerHTML="stack is cleared"
    }


 /*event listeners via delegation*/

    choices.addEventListener("click",clicked)


   function clicked(e){
       if(e.target.matches("button")){
           var button=e.target


   switch(button){
   //for push
  case but1:

var toadd=document.getElementById("toadd").value
toread.innerHTML = toadd +" " +" is added to the stack"
        stackup.push(toadd)
   break;


  //for pop
  case but2:
  toread.innerHTML = stackup.pop() + " is popped from stack"

       break;


     //for display
   case but3:
   stackup.display()
       break;


      //for peek
       case but4:
    toread.innerHTML=stackup.peek()+" "+"is top element in stack"
       break;

     //check if empty
 case but5:

stackup.isEmpty()

 break;

 //for size
 case but6:
 stackup.size()
 break;

 //for clear
case but7:
stackup.clear()
break;


  }


   }

  }


    </script>
    </body>
</html>