js html escape

May 21, 2023 pm 07:37 PM

在编写JS和HTML程序时,经常会遇到需要进行转义的情况。转义就是将特殊字符转换成特定的符号,以便在程序中正确地使用。在下面的文章中,我们将探讨JS和HTML中的常见转义字符。

一、JS中的转义字符

  1. 双引号和单引号(" 和 ')

在JS中,字符串必须被引号包含起来。如果字符串本身包含双引号或单引号,则需要对其进行转义。例如:

var username = "John said, "Hello!"";
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  1. 反斜杠符号()

反斜杠符号是JS中最常用的转义字符之一。它用于将特殊字符转换成普通字符,例如:

var message = 'It's a beautiful day';
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  1. 换行符(

换行符可以在JS字符串中用于创建新行。例如:

var message = 'Hello
world!';
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  1. 回车符()

回车符通常与换行符一起使用,在JS中用于创建新行。例如:

var message = 'Helloworld!';
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  1. 水平制表符( )

水平制表符可用于在JS字符串中创建制表符。例如:

var message = 'Name:    John
Age:    25';
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  1. 垂直制表符( )

垂直制表符通常与水平制表符一起使用,在JS中用于创建制表符。例如:

var message = 'Name:John
Age:    25';
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  1. 退格符()

退格符可用于在JS字符串中创建退格符。例如:

var message = 'Helloworld!';
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二、HTML中的转义字符

  1. 尖括号(< 和 >)

在HTML中,尖括号是用于标签的。如果您需要在HTML代码中使用这些符号,您将需要使用他们的转义字符。例如:

<p>This is an example of using &lt; and &gt; symbols.</p>
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  1. 与符号(&)

与符号也被用于HTML代码中,用于创建特定的字符实体。例如:

<p>This is an example of &amp; symbol in HTML.</p>
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  1. 引号(" 和 ')

当您需要在HTML代码中使用引号时,您需要使用相应的转义字符。例如:

<p>The "quote" symbol is used for emphasis.</p>
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总之,对于任何需要将特殊字符作为普通字符使用的情况,都需要使用转义字符。在开发JS和HTML程序时,熟练掌握这些常见的转义字符是非常重要的。

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