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JavaScript 2022 新特性
tryjs_string_at
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<!DOCTYPE html> <html> <body> <h1>JavaScript Strings</h1> <h2>The at() Method</h2> <p>The at() method returns an indexed element from a string:</p> <p id="demo"></p> <script> const name = "FreeW3C"; let letter = name.at(2); document.getElementById("demo").innerHTML = letter; </script> </body> </html>