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Js 文字列の操作、エンコードとデコード

JavaScript

文字列の長さを調べる

qiita.js
"abc".length

文字列の置換

qiita.js
//該当文字列が複数の場合、最初の文字列が置換される
"abcdeabcde".replace("abc", "ABC")
//すべての該当文字列を置換したい場合
"abcdeabcde".split("abc").join("ABC")

エンコードとデコード

qiita.js
//エンコード
encodeURI("あいうえお")
encodeURIComponent("あいうえお")
//デコード
decodeURI("%E3%81%82%E3%81%84%E3%81%86%E3%81%88%E3%81%8A")
decodeURIComponent("%E3%81%82%E3%81%84%E3%81%86%E3%81%88%E3%81%8A")
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