웹개발/jQuery
[jQuery] 처음배우는 Javascript_jQuery, 값 입력받아 계산하기
hatch
2021. 12. 13. 09:15
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1. 자바스크립트 코드
<!DOCTYPE html>
<html><head><meta charset="UTF-8">
<title>x</title>
</head>
<body>
<h3>계산</h3>
<hr>
<input type="text" id="first"> <input type="text" id="second">
<br>답은 <span id="result"></span>
<br><button onclick="plus()">더하기</button>
<script>
function plus() {
var first = document.getElementById("first");
var second = document.getElementById("second");
var result = document.getElementById("result");
result.innerHTML = parseInt(first.value) + parseInt(second.value);
}
</script>
</body>
</html>
2. JQuery 코드
<!DOCTYPE html>
<html><head><meta charset="UTF-8">
<title>계산</title>
<script src="http://code.jquery.com/jquery-3.4.1.js"></script>
</head>
<body>
<input type="text" id="first"> <input type="text" id="second">
<br>답은 <span id="result"></span>
<br><button id="btn">더하기</button>
<script>
$(document).ready(function(){
$("#btn").click(function(){
var first = $("#first").val();
var second = $("#second").val();
$("#result").text(parseInt(first) + parseInt(second));
});
});
</script>
</body>
</html>