Course schedule

JS reference manual

• JS reference manual (category order)
• JS reference manual (alphabetical order)

JavaScript

• JS array
• JS boolean
• JS klasse
• JS dato
• JS fejl
• JS global
• JS JSON
• JS map
• JS matematik
• JS tal
• JS løfte
• JS regulært udtryk
• JS sæt
• JS streng
• JS objekt
• JS operator
• JS operator prioritet
• JS sætning
• JS typiserede arrayer

Window

• Window objekt
• Window konsol
• Window historie
• Window placering
• Window navigator
• Window skærm

HTML DOM

• HTML dokument
• HTML element
• HTML egenskab
• HTML Event
• HTML Event objekt
• HTML samling
• HTML NodeList
• HTML DOMTokenList
• HTML stil

Web API

• API Canvas
• API konsol
• API Fetch
• API fuldskærm
• API geolokalisering
• API historie
• API MediaQueryList
• API lager
• API validering
• Web API

HTML objekt

• 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 knap
• <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.coms magiske lommekiste

Definition and usage

LOG2E The property is log2e, which is the logarithm base 2 of e, and its value is approximately 1.442695040888963387.

Example

Returns the logarithm base 2 of E:

Math.LOG2E;

Try it yourself

Syntax

Math.LOG2E

Technical details

Browserstøtte

Math.LOG2E Er ES1-karakteristik (JavaScript 1999). Alle browsere understøtter det fuldt ud:

Relaterede sider

Tutorial:JavaScript matematik

Værktøjskasse

JavaScript og HTML DOM reference håndbog

JavaScript eksempler

JavaScript quiz

JavaScript tutorial

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