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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <title>Document</title>
- </head>
- <body>
- <button data-val="test1" data-index="1">1</button>
- <button data-val="test2" data-index="2">2</button>
- <button data-val="test3" data-index="3">3</button>
- <script>
- let btns = document.querySelectorAll('button');
- for(let i = 0; i < btns.length; i++){
- btns[i].onclick = function(){
- console.log(this.dataset)
- }
- }
- </script>
- </body>
- </html>
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