JavaScript Javascript dom manipulation memory leak

Hi I have created a dom using raw javascript DOM:

Javascript code:

var parentElm = document.createElement("div");
var child1 = document.createElement("p");
var child2 = document.createElement("p");

parentElm.id = "parent";
child1.id = "child1";
child2.id = "child2";

child1.innerHTML = "Hello";
child2.innerHTML = "world"; // Is it a good way 

parentElm.appendChild(child1);
parentElm.appendChild(child2);
document.body.appendChild(parentElm);

The resulted HTML is:

<div id="parent">
    <p id="child1">Hello</p>
    <p id="child2">World</p>
</div>

Now when I want to remove the above section, I do as following.

document.body.removeChild(parentElm);

Here I am afraid of javascript memory leak.

  • If I am removing parent element from body, does it totally removed from memory. ?
  • If I am removing parent element from body, does it's child elements are also removed from memory by garbage collector automatically. Or I need to remove child elements manually ?
  • Is using innerHTML in the above code is a good way (child1.innerHTML = "Hello";)

Please help me in javascript dom manipulation.

Answer:1

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