String.prototype.slice()
String.prototype.slice() is a JavaScript method in the String category. Extracts a section of a string and returns it as a new string. The syntax is str.slice(indexStart, indexEnd). It returns a new string. A typical example: "Hello".slice(0, 2) // "He". Its time complexity is O(n), which matters when it runs over large inputs. The TypeScript signature is (start?: number, end?: number): string. A close sibling is String.prototype.charAt(), which returns the character at the specified index. A close sibling is String.prototype.charCodeAt(), which returns the Unicode value of the character at the specified index. A close sibling is String.prototype.concat(), which concatenates strings together. A close sibling is String.prototype.includes(), which checks if a string contains a specified substring. More about this category: String methods for text manipulation — split, replace, trim, match, and more. Related String methods: String.prototype.charAt(), String.prototype.charCodeAt(), String.prototype.concat(), String.prototype.includes(), String.prototype.indexOf(), String.prototype.lastIndexOf(), String.prototype.match(), String.prototype.matchAll().