Result content: counter;ã使ã£ã¦ãã§ãã¯æ°ãã«ã¦ã³ããããã¨ãããã® JSã«ãããã®ã®ããã«å¿ç¨ã¯å¹ãã¾ããããæ°ããã ããªã css .languages {/*ãªã»ãã*/ counter-reset: characters; } input:checked {/*ãã§ãã¯ããããã«ã¦ã³ã*/ counter-increment: characters; } .total:after {/*çä¼¼è¦ç´ ã§ä»»æã®å ´æã«ã«ã¦ã³ãçµæã表示*/ content: counter(characters)"åã®é ç®ããã§ãã¯ãã¦ãã¾ã"; } html <div class="languages"> <div class="input-wrapper"> <input id="foo" type="checkbox"><label for="foo">foo</label>


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