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JavaScript & HTML DOM Reference manual

Ikhtisar

JavaScript benda

JavaScript Array benda JavaScript Boolean benda JavaScript Date benda JavaScript Math benda JavaScript Number benda JavaScript String benda JavaScript RegExp benda JavaScript Global Properties / Fungsi JavaScript operator

Browser benda

Window benda Navigator benda Screen benda History benda Location benda

DOM benda

HTML DOM Document benda HTML DOM objek elemen HTML DOM atribut objek HTML DOM benda acara

HTML benda

<a> <area> <audio> <base> <blockquote> <body> <button> <canvas> <col> <colgroup> <datalist> <del> <details> <dialog> <embed> <fieldset> <form> <iframe> <frameset > <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> - range <input> - password <input> - radio <input> - reset <input> - search <input> - submit <input> - text <input> - time <input> - url <input> - week <keygen> <link> <label> <legend> <li> <map> <menu> <menuItem> <meta> <meter> <object> <ol> <optgroup> <option> <param> <progress> <q> <script> <select> <source> <style> <table> <td> <th> <tr> <textarea> <title> <time> <track> <video>

JavaScript valueOf () metode

Sebelumnya: properti JavaScript POSITIVE_INFINITY

Berikutnya: Metode JavaScript toString ()

Jumlah JavaScript Object

contoh

Mengembalikan Nomor keberatan nilai numerik dasar:

var num = 15;
var n = num.valueOf();

n keluaran:

Definisi dan Penggunaan

Metode valueOf () dapat mengembalikan nomor tali.

Dukungan Browser

Semua browser utama mendukung valueOf () metode

tatabahasa

number.valueOf()

Kembali Nilai

类型	描述
Number	一个数的原始值

rincian teknis

Versi JavaScript:	1.1

Jumlah JavaScript Object

Sebelumnya: properti JavaScript POSITIVE_INFINITY

Berikutnya: Metode JavaScript toString ()