<div id="container"></div>
var elements = [document.createElement('div'), document.createElement('div')];
var fragment = document.createDocumentFragment();
var container = document.getElementById('container');
elements.forEach(element => fragment.appendChild(element));
container.appendChild(fragment);
var changeIndex = 1;
elements[changeIndex] = document.createElement('div');
container.replaceChild(elements[changeIndex], container.children[changeIndex]);
var changeIndex = 1;
elements[changeIndex] = document.createElement('div');
container.children[changeIndex].replaceWith(elements[changeIndex])
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
replaceChild | |
replaceWith |
Test name | Executions per second |
---|---|
replaceChild | 36077.4 Ops/sec |
replaceWith | 41899.3 Ops/sec |
Let's dive into the explanation of the benchmark.
Benchmark Overview
The benchmark is designed to compare two approaches for replacing elements in an HTML document: replaceChild
and replaceWith
. The test creates two elements, appends them to a fragment, and then replaces one of the original elements with a new element using each of these methods.
Options Compared
The benchmark compares the performance of:
replaceChild
: Replaces the specified child node with a new node.replaceWith
: Replaces all child nodes of a specified node with a new node.Pros and Cons of Each Approach
replaceChild
:replaceWith
:Library Usage
The benchmark uses the document
object and its associated methods (createElement
, appendChild
, replaceChild
, and replaceWith
). These are standard DOM (Document Object Model) APIs that provide access to HTML documents.
Special JS Features/Syntax
There are no special JavaScript features or syntax used in this benchmark. It only relies on the standard DOM API.
Benchmark Preparation Code
The preparation code creates two elements, a fragment, and a container element with an ID of "container". The script then appends each element to the fragment and appends the fragment to the container.
Other Alternatives
If you're looking for alternatives to these approaches, consider:
innerHTML
: Replaces the HTML content of an element by replacing its innerHTML property.appendChild
with a single child node: Instead of creating a new element and replacing it, append only the replacement node to the original parent element.Keep in mind that each of these alternatives has its own performance implications and may not be suitable for all use cases.
For more complex DOM manipulations, consider using libraries like jQuery or React, which provide additional APIs and abstractions for working with HTML documents.