Detailed explanation of JS string operations

This time I will bring you a detailed explanation of the operation of JSstring, what are the notes of JS string operation, the following is a practical case, let's take a look.

charAt()                                                                                                                                                                  -                                                                                              -                               that The position where a specific string appears for the first time in the string

substring() Returns a substring of the string

slice() Returns a substring of the string, supports negative parameters (characters The first character in the string is set to -1)

# Concat () to use multiple string into a string

# Replace () to put a certain child in the string Replace a string with a specific string

split()                                                                 ’ s ’ s ’ s ’ s ’ s to ’ s ’ to ’ t ’ s #Search target substring

search() Use regular expression to search for target substring (the index is returned)

ps：JavaScript

Special Characters

You can use backslashes in JavaScript to add special characters to text strings. Insert special characters Backslashes are used to insert ellipses, newlines, quotation marks, and other special characters in text strings.

Please look at the following JavaScript code:

var txt="We are the so-called "Vikings" from the north."
document.write(txt)

In JavaScript, strings use single quotes or double quotes to start or end. This means that the above string will be truncated to: We are the so-called. To solve this problem, you must add a backslash (\) before the quotation marks in "Viking". This converts each double quote into a literal string.

var txt="We are the so-called \"Vikings\" from the north."
document.write(txt)

Now JavaScript can output the correct text string: We are the so-called "Vikings" from the north.

Here is another example:

document.write ("You \& me are singing!")

The above example will produce the following output:

You & me are singing!

The table below lists The remaining special characters can be added to the text string using backslashes:

Code	Output
\'	Single quotes
\"	Double quotes
\&	and ampersand
\\	Backslash
\n	Line break
\r	Carriage return character
\t	Tab character
\b	Backspace character
\f	Form feed character

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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