如何使用对象显示文本内容

Question

How do I iterate through an object that will be displayed on the webpage by using display.textContent.

Given that

var list = {x:1, y:2, z:3};
for (var property in list){
   div.textContent = (list[property])
} 
//Displays 3.  
//Div is referring to my HTML page.

I want to be able to display 1, but then after a button is clicked, it will than display 2, 3, etc.. How could I do that?

Answer 1

You don't store previous value of div.textContent , so you see only last iteration result. Try this

   var list = {x:1, y:2, z:3};
   div.textContent = "";
   for (var property in list){
       div.textContent = div.textContent + " " + (list[property]);
   } 

Answer 2

You could try something like this:

  var list = {x:1, y:2, z:3}, index = 1, // Store the current iteration keys = Object.keys(list); // Grab all the keys for the object var button = document.querySelector("button"), div = document.querySelector("div"); // Bind your click handler button.addEventListener("click", function() { // Might want to do something after '3' if(index >= keys.length) return; // Otherwise set the content from the key at 'index' and increment // the index for the next click div.textContent = list[keys[index++]]; }); 

 <div>1</div> <button>Next</button> 

Answer 3

How to display 1,2,3 every time a button is clicked?

 function displayResult(){ var list = {x:1, y:2, z:3}; var div = document.querySelector("#myDiv"); //getting my div element var text = new Array(); for (var property in list){ text.push(list[property]) //adding values in text array } div.textContent = text.join(",") //array concatenation } 

 <div id="myDiv"></div> <button onclick="displayResult()">Display</button>