Regular Expression entry: "or" Match

Source: Internet
Author: User

Sometimes, we need to cancel the bold, italic, and other effects in a text segment, we want to match all "<B>", "</B>", "<I>", "</I>", and then replace them with null, we can only match and replace the previous knowledge twice /? B> "," </? I> ".

In a regular expression, you can use "|" to split an expression into two parts: "reg1 | reg2", which means: match all the text that matches the expression reg1 or the text that matches the expression reg2.

<\/?i>|<\/?b>
Effect demonstration Welcome to bkjia.com (BOLD ).
Welcome Bkjia.com(Italic). * 2
Welcome to bkjia.com. * 3 (normal)

This example code
function reg_replace(){var test = document.getElementById("test");var regex = /<\/?i>|<\/?b>/g;test.innerHTML = test.innerHTML.replace(regex,"");}
Additional reading

The topic list of this article is as follows:

  1. What is a regular expression?
  2. Getting started with regular expressions: match a Fixed Single Character
  3. Getting started with regular expressions: matching any single character
  4. Getting started with regular expressions: Use character groups
  5. Getting started with regular expressions: Use character ranges in character groups
  6. Getting started with regular expressions: Use of assense character groups
  7. Getting started with regular expressions: matching null characters
  8. Getting started with regular expressions: Match one or more characters
  9. Regular Expression: matches zero or multiple characters.
  10. Regular Expression entry: matches zero or one string.
  11. Getting started with regular expressions: Match fixed numbers of Characters
  12. Getting started with regular expressions: match the number of characters in a range
  13. Getting started with regular expressions: greedy matching
  14. Getting started with regular expressions: inert matching
  15. Entry to Regular Expressions: two matching Modes
  16. Getting started with regular expressions: match word boundaries
  17. Getting started with regular expressions: boundary definition and relativity
  18. Getting started with regular expressions: Match non-word boundaries
  19. Getting started with regular expressions: match the beginning and end of a text
  20. Entry to regular expression: submode
  21. Regular Expression entry: "or" Match
  22. Getting started with regular expressions: replacing with referenced text
  23. Getting started with regular expressions: unmatched
  24. Regular Expression Summary: Regular Expressions in JavaScript
  25. Regular Expression Summary: advanced application of regular expressions in js

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