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JavaScript 字符串 at() 方法
tryjsref_string_at2
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<!DOCTYPE html> <html> <body> <h1>JavaScript String</h1> <h2>Bracket Notation</h2> <p>The bracked notation [] returns an indexed character from a string.</p> <p id="demo"></p> <script> let text = "freew3c"; let character = text[0]; document.getElementById("demo").innerHTML = character; </script> </body> </html>