Regex Match Whole String
Regular expressions are patterns used to match character combinations in strings. In JavaScript, regular expressions are also objects.
Regex Match Entire String
A regular expression pattern is composed of simple characters, such as /abc/
, or a combination of simple and special characters, such as /ab*c/
or /Chapter (\d+)\.\d*/
.
let str = 'Hello 456 World 123'; let regex1 = /\b(World)\b/g; let regex2 = /\b(world)\b/g; console.log(str.match(regex1)); // [ 'World' ] console.log(str.match(regex2)); // null
let str = 'abc' let pat = /^abc$/g; console.log(str.match(pat));