Search results
The indexOf () method returns the position of the first occurrence of a value in a string. The indexOf () method returns -1 if the value is not found. The indexOf () method is case sensitive.
- Try It Yourself
The W3Schools online code editor allows you to edit code and...
- Try It Yourself
29 lis 2023 · The indexOf() method of String values searches this string and returns the index of the first occurrence of the specified substring. It takes an optional starting position and returns the first occurrence of the specified substring at an index greater than or equal to the specified number.
There are 4 methods for extracting string characters: The at (position) Method. The charAt (position) Method. The charCodeAt (position) Method. Using property access [] like in arrays. JavaScript String charAt () The charAt () method returns the character at a specified index (position) in a string: Example.
Kurs Javascript - String - teksty. W JavaScript tak samo jak w innych językach możemy operować nie tylko na liczbach, ale także na tekstach. Tak zwane stringi w JavaScript możemy tworzyć na kilka sposobów: const text = "Ala ma kota, a kot ma Ale."; const text = 'Ala ma kota'; Kiedy którego używać?
25 lip 2024 · 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.
This JavaScript tutorial explains how to use the string method called indexOf () with syntax and examples. In JavaScript, indexOf () is a string method that is used to find the location of a substring in a string.
30 wrz 2024 · The JavaScript indexOf () method helps locate a substring within a string and returns its position. This method is case-sensitive, meaning that “Hello“.indexOf (“hello”) will return -1 due to the mismatch in the case.
