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<html><head> <meta charset="utf-8"> <title>Contar checkbox</title></head><body> <form> Checkbox 1 <input type = "checkbox" /> Checkbox 2 <input type = "checkbox" checked /> Checkbox 3 <input type = "checkbox" /> Checkbox 4 <input type = "checkbox" checked /> Checkbox 5 <input type = "checkbox" /> </form></body></html>document.body.innerHTML += "Total de checkbox:" + document.querySelectorAll("form [type=checkbox]").length + "<br />Total de checkbox marcados: " + document.querySelectorAll("form [type=checkbox]:checked").length;
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300px
300px
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|---|---|
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