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JS Reference Manual

JS Reference Manual (Categorized Order)
JS Reference Manual (Alphabetical Order)

JavaScript

JS Array
JS Boolean
JS Class
JS Date
JS Error
JS Global
JS JSON
JS Map
JS Math
JS Number
JS Promise
JS RegExp
JS Set
JS String
JS Object
JS Operator
JS Operator Precedence
JS Statement
JS Typed Array

Window

Window Object
Window Console
Window History
Window Location
Window Navigator
Window Screen

HTML DOM

HTML Document
HTML Element
HTML Attribute
HTML Event
HTML Event Object
HTML Collection
HTML NodeList
HTML DOMTokenList
HTML Style

Web API

API Canvas
API Console
API Fetch
API Fullscreen
API Geolocation
API History
API MediaQueryList
API Storage
API Validation
Web API

HTML Object

<a>
<abbr>
<address>
<area>
<article>
<aside>
<audio>
<b>
<base>
<bdo>
<blockquote>
<body>
<br>
<button>
<canvas>
<caption>
<cite>
<code>
<col>
<colgroup>
<datalist>
<dd>
<del>
<details>
<dfn>
<dialog>
<div>
<dl>
<dt>
<em>
<embed>
<fieldset>
<figcaption>
<figure>
<footer>
<form>
<head>
<header>
<h1> - <h6>
<hr>
<html>
<i>
<iframe>
<img>
<ins>
<input> button
<input> checkbox
<input> color
<input> date
<input> datetime
<input> datetime-local
<input> email
<input> file
<input> hidden
<input> image
<input> month
<input> number
<input> password
<input> radio
<input> range
<input> reset
<input> search
<input> submit
<input> text
<input> time
<input> url
<input> week
<kbd>
<label>
<legend>
<li>
<link>
<map>
<mark>
<menu>
<menuitem>
<meta>
<meter>
<nav>
<object>
<ol>
<optgroup>
<option>
<output>
<p>
<param>
<pre>
<progress>
<q>
<s>
<samp>
<script>
<section>
<select>
<small>
<source>
<span>
<strong>
<sub>
<summary>
<sup>
<table>
<tbody>
<td>
<tfoot>
<th>
<thead>
<tr>
<textarea>
<time>
<title>
<track>
<u>
<ul>
<var>
<video>

Other reference manuals

CSSStyleDeclaration
JS type conversion

Elective courses

Course recommendation：

CodeW3C.com Treasure Box

JavaScript LN2 property

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Definition and usage

LN2 The property is loge2, which is the natural logarithm of 2, and its value is approximately 0.69314718055994528623.

Example

Returns the natural logarithm of 2：

Math.LN2;

Try it yourself

Syntax

Math.LN2

Technical details

Return value：	A number representing the natural logarithm of 2.
JavaScript version：	ECMAScript 1

Browser Support

Math.LN2 Is an ES1 Feature (JavaScript 1999). All browsers fully support it:

Chrome	IE	Edge	Firefox	Safari	Opera
Support	Support	Support	Support	Support	Support

Tutorial:JavaScript Math

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Schedule of Courses

JS Reference Manual

JavaScript

Window

HTML DOM

Web API

HTML Object

Other reference manuals

Elective courses

Course recommendation：

JavaScript LN2 property

Definition and usage

Example

Syntax

Technical details

Browser Support

Related Pages

Toolbox

JavaScript and HTML DOM Reference Manual

JavaScript Examples

JavaScript Quiz

JavaScript Tutorial

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