These features are likely stable because removing them will cause backward compatibility issues and break legacy websites. Some implementations of ECMAScript have included additional properties for some of the standard native objects. * @param {integer} length how many characters to return More formally, in this case the substring starts at max (start + str.length, 0). The index of the first character is 0, and the index of the last character is 1 less than the length of the string. Ask Question Asked 2 years, 6 months ago Modified 6 months ago Viewed 95k times 34 My editor (VS Code) shows that my variable name is deprecated. For Dai, even if I remove the line (name = 5), it still says deprecated. If start_pos is positive and greater than the length of the string, substr () returns no characters. // "This is what a ^superscript looks like. The deprecated substr () method returns the characters in a string beginning at the specified location through the specified number of characters. Not the answer you're looking for? Follow our guided path, With our online code editor, you can edit code and view the result in your browser, Join one of our online bootcamps and learn from experienced instructors, We have created a bunch of responsive website templates you can use - for free, Large collection of code snippets for HTML, CSS and JavaScript, Learn the basics of HTML in a fun and engaging video tutorial, Build fast and responsive sites using our free W3.CSS framework, Host your own website, and share it to the world with W3Schools Spaces. To extract characters from the end of the string, use a negative start position. This page was last modified on Feb 21, 2023 by MDN contributors. Getting a substring from a string is one of the most common operations in JavaScript. Initializers in var declarations of forin loops headers are deprecated and produce syntax errors in strict mode. You should work to remove their use from your code. Use our color picker to find different RGB, HEX and HSL colors, W3Schools Coding Game! Return: It will returns sub string from the specified string. developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/, Exploring the infrastructure and code behind modern edge functions, Jamstack is evolving toward a composable web (Ep. Note If start is negative, substr uses it as a character index from the end of the string. You signed in with another tab or window. What is the "salvation ready to be revealed in the last time"? Conclusions from title-drafting and question-content assistance experiments What's the state of the Javascript language? If one knows the desired length of the new string, @supercat - It isn't deprecated, it's never been part of the standard library in the first place. --> is only valid at the start of a line (to avoid ambiguity with a postfix decrement followed by a greater than operator), while