Common regular expressions

• Use the ^ and $ anchors to match the start and end of the string, respectively.
• Add the string you want to match in-between the two anchors.
• Use the ^ and $ anchors to match the start and end of the string, respectively.
• Do not add any characters in-between to match an empty string.
• Use the \s meta-sequence to match any whitespace character, including spaces, tabs, newlines, etc.

const regexp = /^abc$/;
// Where 'abc' is the exact string you want to match

• Use the ^ and $ anchors to match the start and end of the string, respectively.
• Do not add any characters in-between to match an empty string.
• Use the \s meta-sequence to match any whitespace character, including spaces, tabs, newlines, etc.
• Use the + quantifier to match one or more occurrences of the previous character.
• Add the global flag (g) to match all occurrences of the pattern in the string.
• Depending on the environment, line breaks can be represented in different ways.