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Character Class ↔ RegExp Syntax [] to wrap Class Range or Pattern Character

Class Range​

a set of characters express by hypen pattern: a-z

[abc]​

Character Class to match chars in bracket

[^abc]​

RegExp Negated Character Class to NOT match chars abc in bracket

[0-9]​

RegExp Character Class to match digit range from 0-9

[A-z]​

RegExp Character Class to match letter range (a-z & A-Z)

JS doesn't support [:punct:] [:space:] [:blank:] !

[:punct:]​

RegExp Character Class to match punctuation char

[:space:]​

RegExp Character Class to match space char

[:blank:]​

RegExp Character Class to match space or tab char

^[abc]​

RegExp Character Class to match at line start char

References​

  1. [abc] ↔ Character Class to match chars in bracket

  2. [^abc] ↔ RegExp Negated Character Class to NOT match chars abc in bracket

  3. [0-9] ↔ RegExp Character Class to match digit range from 0-9

  4. [A-z] ↔ RegExp Character Class to match letter range (a-z & A-Z)

  5. [:punct:] ↔ RegExp Character Class to match punctuation char

  6. [:space:] ↔ RegExp Character Class to match space char

  7. [:blank:] ↔ RegExp Character Class to match space or tab char

  8. ^[abc] ↔ RegExp Character Class to match at line start char

  9. ^ ↔ RegExp Assertion to negate Character Class or only match start of line