JavaScript / HTML与DOM，Button一起工作，每次点击时都会计算点击并生成新字符串

Question

I need create button which count click but make every time new string. I have that function with scope which make count every time when I click, but I cannot understand, why in HTML it every time count zero, should be like this: (Verticaly every click make new string with updated count) 1 2 3 4 ...

<form action="#">
    <input type="button" value="Count" onclick="add_count()">
</form>

function add_count() {
let integer = (function () {
    let counter = 0;
    return function() {return counter++;};
}());
let tag = document. createElement("p");
let text;
text = document. createTextNode(integer());
tag. appendChild(text);
let element = document. getElementsByTagName("body")[0];
element. appendChild(tag)};

Answer 1

You just need to move the counter initialization outside of the function scope

I've tweaked your code a bit.

Note: try not using inline event listeners, instead use event listeners in JavaScript file

 let counter = 0; const button = document.querySelector('input'); function add_count() { let integer = (() => counter++); const tag = document.createElement("p"); const text = document.createTextNode(integer()); tag.appendChild(text); const element = document.body element.appendChild(tag) }; button.addEventListener('click', add_count)

 <form action="#"> <input type="button" value="Count"> </form>