Web Reference: Jul 10, 2025 · The substring() method of String values returns the part of this string from the start index up to and excluding the end index, or to the end of the string if no end index is supplied. The substring() method extracts characters, between two indices (positions), from a string, and returns the substring. The substring() method extracts characters from start to end (exclusive). Oct 4, 2018 · It's often a lot more concise to specify how long you want a string to be rather than the end index of the string. If substr really ever is removed from browser or Node.js JavaScript support, I suspect many of us will simply monkey-patch substr back into existence anyway.
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5 String Prototype Substring Javascript Net Worth 2026: Salary, Income & Wealth Net Worth & Biography

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Last Updated: April 7, 2026
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