Find First Occurrence of a Substring Without Using Built-in Methods | JavaScript DSA

In this JavaScript DSA solution, we find the first occurrence of a substring inside a string without using built-in methods like indexOf() or includes(). The approach uses nested loops and character-by-character comparison to locate the matching substring.

✅ No Built-in Search Methods
✅ Character-by-Character Comparison
✅ Beginner-Friendly Logic
✅ Common Coding Interview Question

Time Complexity: O(n × m)
Space Complexity: O(1)

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Видео Find First Occurrence of a Substring Without Using Built-in Methods | JavaScript DSA канала Rahul Shrivastava