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[英]How to check whether the date is in past or not?and How to get difference between two dates? by input tag type date and type time
[英]Using input type “Date” to find the difference between two dates
我很好奇為什么我的代碼無法正常運行。 我從html文件中檢索Date輸入的值,並創建了一個函數來查找差異。 但是,span元素將不會更新。 請向我解釋為什么我錯了,以及如何解決該問題。 謝謝!
const setup = () => {
let firstDate = $('#firstDate').val();
let secondDate = $('#secondDate').val();
const findTheDifferenceBetweenTwoDates = (firstDate, secondDate) => {
let timeDifference = Math.abs(secondDate.getTime() -
firstDate.getTime());
let millisecondsInADay = (1000 * 3600 * 24);
let differenceOfDays = Math.ceil(timeDifference / secondsInADay);
return differenceOfDays;
}
let result = findTheDifferenceBetweenTwoDates(firstDate, secondDate);
$("span").text(result);
}
$("span").text(result);
應該替換為
$("#span").text(result);
如果span是HTML元素的ID。
我發現您的問題不是來自跨度的問題,而是來自javascript的問題,您應該將字符串日期解析為js new日期,並且您在secondsInADay中有一個錯字應該是millisecondsInADay
還有一個錯誤,該代碼會在文檔准備就緒時運行,這是錯誤的,因為您正在等待用戶的輸入,所以我添加了一個提交按鈕
檢查此密碼: https ://codepen.io/hassanalisalem/pen/gGLyvJ
您的HTML
<div class="container">
<h1>Date Difference!</h1>
<h1>First Date</h1>
<input id="firstDate" type ="date">
<br/>
<h1>Second Date</h1>
<input id="secondDate" type ="date">
<br>
<h1>Amount of Days: <span id="result"></span></h1>
<button id="submit">submit</button>
</div>
您的js:
const animateBg = (i) => {
document.body.style.backgroundColor = 'hsl(' + i + ', 100%, 50%)';
setTimeout(function() {
animateBg(++i)
}, i);
}
animateBg(0);
const setup = () => {
let firstDate = $('#firstDate').val();
let secondDate = $('#secondDate').val();
const findTheDifferenceBetweenTwoDates = (firstDate, secondDate) => {
firstDate = new Date(firstDate);
secondDate = new Date(secondDate);
let timeDifference = Math.abs(secondDate.getTime() - firstDate.getTime());
let millisecondsInADay = (1000 * 3600 * 24);
let differenceOfDays = Math.ceil(timeDifference / millisecondsInADay);
return differenceOfDays;
}
let result = findTheDifferenceBetweenTwoDates(firstDate, secondDate);
alert(result);
$("#result").text(result);
}
$(document).ready(function () {
$('#submit').click(function () {
setup();
})
});
現在應該可以在Codepen上工作了
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