时间: 2021-07-31 作者:daque
substring()因变量这个因变量常常运用于索取字符串的任何局部。它的参数是'start' 和'end'。发端的数值是第一个字符的索引,中断数值是归来局部之后的第一个字符的索引。你大概听起来会感触云里雾里的,然而一个最佳的回顾本领是:归来字符串的长度即是end-start。即使第二个参数简略了,那么它默许为直到字符串的中断。底下是几个例子:var str = "this is a string";str.substring(1, 3); //截止为hi str.substring(3, 1); //截止为hi str.substring(0, 4); //截止为this str.substring(8); //截止为hi str.substring(8, 8); //截止为空上头的第二个例子是说领会当start>end的功夫,那么这两个参数机动变换.结果的例子表露了:当start即是end的功夫,归来数值为空字符串。字符方法(html)底下引见javascript中最少运用的因变量。固然它们并不是格外有效,但起码它们为你的代码减少少许化妆。那些本领从字符东西中创造html代码用来表露在网页上。
str.anchor("anchor1")
<a name="anchor1">this is a string</a>
this is a string
str.big()
<big>this is a string</big>
this is a string
str.blink()
<blink>this is a string</blink >
this is a string
str.bold()
<b>this is a string</b>
this is a string
str.fixed()
<tt>this is a string</tt>
this is a string
str.fontcolor("darkred")
<font color="darkred">this is a string</font>
this is a string
str.fontsize(5)
<font size="5">this is a string</font>
this is a string
str.italics()
<i>this is a string</i>
this is a string
str.link("index.html")
<a href="index.html">this is a string</a>
this is a string
str.small()
<small>this is a string</smal>
this is a string
str.strike()
<strike>this is a string</strike>
this is a string
str.sub()
<sub>this is a string</sub>
this is a string
str.sup()
<sup>this is a string</sup>
this is a string
str.tolowercase()
this is a string
this is a string
str.touppercase()
this is a string
this is a string
上表中结果的两个例子不是与html一定关系的,然而它们动作一种方法东西是很有效的。一切的那些本领不妨运用到字符串中来创造一个定制的方法。