我正在尝试计算两个字段的总和并验证它们。基本上,我需要两个输入字段的值之和大于100,并且如果总和小于100则要显示提示。
到目前为止,我有这个:
<input type="text" class="input" id="value1">
<input type="text" class="input" id="value2">
<script>
$(document).ready(function(){
var val1 = $("#value1").val();
var val2 = $("#value2").val();
});
</script>
但是,如果这两个输入的总和小于100,我不知道如何验证结果并显示提示。
你能指出我正确的方向吗?
答案 0 :(得分:1)
答案 1 :(得分:1)
$(document).ready(function() {
var val1 = parseInt($("#value1").val());
var val2 = parseInt($("#value2").val());
var sum = val1 + val2;
if(sum > 100) {
alert(sum+ ' is greater than 100')
} else {
alert(sum + ' is less than 100')
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<input type="text" class="input" id="value1" value="70">
<input type="text" class="input" id="value2" value="50">
检查此示例。
答案 2 :(得分:0)
您需要使用focusout
来获取实时总和,并在总和小于100时提醒用户,您也可以添加keyup
个事件,但这不会有意义因为它会在你打字后立即开始提醒。 IMO,您应该有一个按钮,点击该按钮,即可触发计算和验证
如果您已在输入字段中填充了值,则只需调用/触发按钮的focusout
或click
事件:
:
$("#value1, #value2").on('focusout', function() {
var value2 = parseInt($("#value2").val()) > 0 ? parseInt($("#value2").val()) : 0;
var value1 = parseInt($("#value1").val()) > 0 ? parseInt($("#value1").val()) : 0
var sumOfValues = value1 + value2;
if (sumOfValues < 100) {
console.log('Your sum is ' + sumOfValues + ' which is less than 100');
}
});
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" class="input" id="value1">
<input type="text" class="input" id="value2">
&#13;
使用按钮:
$("button").on('click', function() {
var value2 = parseInt($("#value2").val()) > 0 ? parseInt($("#value2").val()) : 0;
var value1 = parseInt($("#value1").val()) > 0 ? parseInt($("#value1").val()) : 0
var sumOfValues = value1 + value2;
if (sumOfValues < 100) {
console.log('Your sum is ' + sumOfValues + ' which is less than 100');
}
});
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" class="input" id="value1">
<input type="text" class="input" id="value2">
<button>Calculate</button>
&#13;
答案 3 :(得分:0)
dplyr::near
答案 4 :(得分:0)
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
</head>
<body>
<input type="text" class="input" id="value1">
<input type="text" class="input" id="value2">
<button type="sumbit" name="submit" id="submit">check sum</button>
<p id="resultMessage"></p>
<script>
$(document).ready(function() {
// on button pressed
$('#submit').on('click', function() {
var val1 = $("#value1").val();
var val2 = $("#value2").val();
// numeric validation
if (!isNumeric(val1) || !isNumeric(val2)) {
$('#resultMessage').text('Some field contains not a number');
return;
}
// + operator converts input Strings to Number type
var sum = +val1 + +val2;
if (sum > 100) {
// if sum greather than 100
$('#resultMessage').text('Sum is greather than 100 (' + sum + ')');
} else if (sum < 100) {
// some code if sum less than 100 ...
$('#resultMessage').text('Sum is less than 100 (' + sum + ')');
} else {
// sum is 100
$('#resultMessage').text('Sum equals 100');
}
});
// function for numeric validation
function isNumeric(n) {
return !isNaN(parseFloat(n)) && isFinite(n);
}
});
</script>
</body>
</html>