Web Reference: ECMAScript 2019 added the String method trimStart() to JavaScript. The trimStart() method works like trim(), but removes whitespace only from the start of a string. Jul 10, 2025 · Some of the most-used operations on strings are to check their length, to build and concatenate them using the + and += string operators, checking for the existence or location of substrings with the indexOf() method, or extracting substrings with the substring() method. Aug 14, 2025 · JavaScript provides a variety of built-in methods to work with strings — allowing you to extract, modify, search, and format text with ease. Below are some of the most commonly used core string methods:
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