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In the world of JavaScript, strings are ubiquitous. Whether you’re working with user input, API responses, or data manipulation, you’ll inevitably encounter strings in your code. While strings may seem simple at first glance, they pack a punch with a plethora of built-in methods that can supercharge your text manipulation game.
Today, we’ll dive into four of these string superheroes: .startsWith(), .endsWith(), .includes(), and .repeat().
.startsWith(): The Front Guard
The .startsWith() method is a powerful ally when you need to check if a string starts with a specific substring. It returns a boolean value (true or false) based on whether the string starts with the provided substring or not. This method is particularly useful for validating user input, parsing data, or performing conditional logic based on string patterns.
const word = "JavaScript";
console.log(word.startsWith("Java")); // true
console.log(word.startsWith("Script")); // false
// You can also specify a position to start the search
console.log(word.startsWith("Script"…
