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jQuery/calculate-checkbox-value
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script | |
| src="https://code.jquery.com/jquery-3.3.1.slim.js" | |
| integrity="sha256-fNXJFIlca05BIO2Y5zh1xrShK3ME+/lYZ0j+ChxX2DA=" | |
| crossorigin="anonymous"></script> | |
| <script type="text/javascript" src="calculate-checkbox-value.js"></script> | |
| </head> | |
| <body> | |
| <div class="price_sum"> | |
| <form> | |
| <ul> | |
| <li><input type="checkbox" checked><span data-price="1">一円</span></li> | |
| <li><input type="checkbox"><span data-price="10">十円</span></li> | |
| <li><input type="checkbox" checked><span data-price="100">百円</span></li> | |
| <li><input type="checkbox"><span data-price="1000">千円</span></li> | |
| </ul> | |
| </form> | |
| </div> | |
| <div> | |
| <p>合計金額 : <span class="price_display"></span> 円</p> | |
| </div> | |
| </body> | |
| </html> |
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| $(function(){ | |
| calPrice(); | |
| $("input").on("change", function(){ | |
| calPrice(); | |
| }); | |
| function calPrice(){ | |
| var totalPrice = 0; | |
| $(".price_sum li").each(function(){ | |
| if ($(this).find("input").prop("checked")) { | |
| totalPrice += Number($(this).find("span").data("price")); | |
| } | |
| $(".price_display").text(totalPrice); | |
| }); | |
| } | |
| }); |
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