Javascript：字串對象（string）的基本操作，javascriptstring

最後更新：2015-02-04 來源：互聯網

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本文代碼整理自w3school：http://www.w3school.com.cn

1.擷取字串的長度：

var s = "Hello world";document.write("length:"+s.length);

2.為字串添加各種樣式，如：

var txt = "Some words";document.write("<p>Big: " + txt.big() + "</p>")document.write("<p>Small: " + txt.small() + "</p>")document.write("<p>Bold: " + txt.bold() + "</p>")document.write("<p>Italic: " + txt.italics() + "</p>")document.write("<p>Blink: " + txt.blink() + " (does not work in IE)</p>")document.write("<p>Fixed: " + txt.fixed() + "</p>")document.write("<p>Strike: " + txt.strike() + "</p>")document.write("<p>Fontcolor: " + txt.fontcolor("Red") + "</p>")document.write("<p>Fontsize: " + txt.fontsize(16) + "</p>")document.write("<p>Link: " + txt.link("http://www.w3school.com.cn") + "</p>")

3.擷取字串中部分內容首次出現的位置：

var hw_text = "Hello world";document.write(hw_text.indexOf("Hello")+"<br/>");document.write(hw_text.indexOf("world")+"<br/>");document.write(hw_text.indexOf("abc")+"<br/>");

4.內容替換：

var str="Visit Microsoft!"document.write(str.replace(/Microsoft/,"W3School"))

：

範例程式碼：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><meta http-equiv="Content-Language" content="zh-cn" /><title>Javascript 字串對象</title><head>  <style>    body {background-color:#e6e6e6}  </style></head><body>  <h3>（一）length屬性：擷取字串的長度</h3>  <p id="hw">Hello world, Hello javascript!</p>  <script>    var s = document.getElementById("hw").innerHTML;    document.write("length:"+s.length);  </script>  <h3>（二）為字串添加樣式</h3>  <p>對字串調用樣式的相關方法時，會自動拼接相應的html標籤</p>  <p id = "hw_02">some words</p>  <button onclick="alertBig()">Call txt.big()</button>  <script>    var txt = document.getElementById("hw_02").innerHTML;    document.write("<p>Big: " + txt.big() + "</p>")    document.write("<p>Small: " + txt.small() + "</p>")    document.write("<p>Bold: " + txt.bold() + "</p>")    document.write("<p>Italic: " + txt.italics() + "</p>")    document.write("<p>Blink: " + txt.blink() + " (does not work in IE)</p>")    document.write("<p>Fixed: " + txt.fixed() + "</p>")    document.write("<p>Strike: " + txt.strike() + "</p>")    document.write("<p>Fontcolor: " + txt.fontcolor("Red") + "</p>")    document.write("<p>Fontsize: " + txt.fontsize(16) + "</p>")    document.write("<p>Link: " + txt.link("http://www.w3school.com.cn") + "</p>")    function alertBig(){      alert(txt.big());    }  </script>  <h3>（三）indexOf方法:定位字串中某一個指定的字元首次出現的位置</h3>  <script>    var hw_text = "Hello world";    document.write(hw_text.indexOf("Hello")+"<br/>");    document.write(hw_text.indexOf("world")+"<br/>");    document.write(hw_text.indexOf("abc")+"<br/>");  </script>  <h3>（四）replace()方法：替換字串中的部分內容</h3>  <script>    var str="Visit Microsoft!"    document.write(str.replace(/Microsoft/,"W3School"))  </script></body></html>

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Javascript：字串對象（string）的基本操作，javascriptstring

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