我正在尝试添加输入日期字段的功能,以便当用户输入数字时,斜杠“/”会自动添加。
假设我有以下html:
<input type="text" id="fooDate" />
假设我有以下javascript:
var dateField = document.getElementById("fooDate");
dateField.onkeyup = bar;
bar
应该是什么?
到目前为止,谷歌的最佳结果是:
function bar(evt)
{
var v = this.value;
if (v.match(/^\d{2}$/) !== null) {
this.value = v + '/';
} else if (v.match(/^\d{2}\/\d{2}$/) !== null) {
this.value = v + '/';
}
}
谢谢!
也 - 我知道在你打字的时候输入斜线。只需滚动它:p
答案 0 :(得分:18)
更新/编辑:显然,目前支持广泛HTML5的最简单的解决方案是使用<input type="date" name="yourName">
。
对于抱怨它不能容纳退格或粘贴的人,我修改了原文:
//Put our input DOM element into a jQuery Object
var $jqDate = jQuery('input[name="jqueryDate"]');
//Bind keyup/keydown to the input
$jqDate.bind('keyup','keydown', function(e){
//To accomdate for backspacing, we detect which key was pressed - if backspace, do nothing:
if(e.which !== 8) {
var numChars = $jqDate.val().length;
if(numChars === 2 || numChars === 5){
var thisVal = $jqDate.val();
thisVal += '/';
$jqDate.val(thisVal);
}
}
});
`
答案 1 :(得分:4)
这是一种简单的方法:
Date: <input name=x size=10 maxlength=10 onkeyup="this.value=this.value.replace(/^(\d\d)(\d)$/g,'$1/$2').replace(/^(\d\d\/\d\d)(\d+)$/g,'$1/$2').replace(/[^\d\/]/g,'')">
&#13;
答案 2 :(得分:2)
我有一个可以使用jquery-ui datepicker的替代方法,没有formatter.js。它旨在从keyup
和change
事件中调用。它增加了零填充。它通过从dateFormat字符串构造表达式,使用各种支持的日期格式。我只能用少于三次的替换来想办法。
// Example: mm/dd/yy or yy-mm-dd
var format = $(".ui-datepicker").datepicker("option", "dateFormat");
var match = new RegExp(format
.replace(/(\w+)\W(\w+)\W(\w+)/, "^\\s*($1)\\W*($2)?\\W*($3)?([0-9]*).*")
.replace(/mm|dd/g, "\\d{2}")
.replace(/yy/g, "\\d{4}"));
var replace = "$1/$2/$3$4"
.replace(/\//g, format.match(/\W/));
function doFormat(target)
{
target.value = target.value
.replace(/(^|\W)(?=\d\W)/g, "$10") // padding
.replace(match, replace) // fields
.replace(/(\W)+/g, "$1"); // remove repeats
}
答案 3 :(得分:1)
This solution also handle the delete and backspace keys :
jQuery('input[name="dateofbirth"]').bind('keyup',function(event){
var key = event.keyCode || event.charCode;
if (key == 8 || key == 46) return false;
var strokes = $(this).val().length;
if(strokes === 2 || strokes === 5){
var thisVal = $(this).val();
thisVal += '/';
$(this).val(thisVal);
}
// if someone deletes the first slash and then types a number this handles it
if(strokes>=3 && strokes<5){
var thisVal = $(this).val();
if (thisVal.charAt(2) !='/'){
var txt1 = thisVal.slice(0, 2) + "/" + thisVal.slice(2);
$(this).val(txt1);
}
}
// if someone deletes the second slash and then types a number this handles it
if(strokes>=6){
var thisVal = $(this).val();
if (thisVal.charAt(5) !='/'){
var txt2 = thisVal.slice(0, 5) + "/" + thisVal.slice(5);
$(this).val(txt2);
}
}
});
答案 4 :(得分:1)
如果您正在寻找@ Chris的答案的纯js版本
var newInput = document.getElementById("theDate");
newInput.addEventListener('keydown', function( e ){
if(e.which !== 8) {
var numChars = e.target.value.length;
if(numChars === 2 || numChars === 5){
var thisVal = e.target.value;
thisVal += '/';
e.target.value = thisVal;
}
}
});
HTML部分可能(如有必要):
<input type="text" name="theDate" id="birthdate" maxlength="10"/>
答案 5 :(得分:1)
处理退格键,删除,粘贴,长按。
let $jqDate = $('.date-slashes');
$jqDate.bind('keyup', function(ev) {
if (ev.which !== 8) {
let input = $jqDate.val();
let out = input.replace(/\D/g, '');
let len = out.length;
if (len > 1 && len < 4) {
out = out.substring(0, 2) + '/' + out.substring(2, 3);
} else if (len >= 4) {
out = out.substring(0, 2) + '/' + out.substring(2, 4) + '/' + out.substring(4, len);
out = out.substring(0, 10)
}
$jqDate.val(out)
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<input name="dob" class="date-slashes" type="tel" maxlength="10" placeholder="mm/dd/yyyy">
答案 6 :(得分:1)
我的React正则表达式解决方案:
// add auto "/" for date, i.e. MM/YY
handleExpInput(e) {
// ignore invalid input
if (!/^\d{0,2}\/?\d{0,2}$/.test(e.target.value)) {
return;
}
let input = e.target.value;
if (/^\d{3,}$/.test(input)) {
input = input.match(new RegExp('.{1,2}', 'g')).join('/');
}
this.setState({
expDateShow: input,
});
}
答案 7 :(得分:0)
尝试使用此插件:http://digitalbush.com/projects/masked-input-plugin/ 它适用于jquery。
答案 8 :(得分:0)
此解决方案适合我。我已捕获模糊事件,但如果要使用keyup事件,则必须更改代码。 HTML
<input type="text" id="fooDate" onblur="bar(this)"/>
的Javascript
function bar(txtBox) {
if (txtBox == null) {
return ''
}
var re = new RegExp(/(\d{6})(\d{2})?/);
if (re.test(txtBox.value)) {
if (txtBox.value.length == 8) {
txtBox.value = txtBox.value.substring(0, 2) + '/' + txtBox.value.substring(2, 4) + '/' + txtBox.value.substring(4, 8)
}
if (txtBox.value.length == 7) {
txtBox.value = txtBox.value.substring(0, 2) + '/' + txtBox.value.substring(2, 3) + '/' + txtBox.value.substring(3, 8)
}
if (txtBox.value.length == 6) {
if (txtBox.value.substring(4, 6) < 20) {
txtBox.value = txtBox.value.substring(0, 2) + '/' + txtBox.value.substring(2, 4) + '/20' + txtBox.value.substring(4, 6);
} else {
txtBox.value = txtBox.value.substring(0, 2) + '/' + txtBox.value.substring(2, 4) + '/19' + txtBox.value.substring(4, 6);
}
}
}
return txtBox.value;
}
答案 9 :(得分:0)
我花了一些时间来研究Chris在上面发布的解决方案,并负责除粘贴之外的所有工作,这在我阅读原始海报时不是必需的。
//Bind keyup/keydown to the input
$('.date').bind('keyup', 'keydown', function(e) {
//check for numerics
var thisValue = $(this).val();
thisValue = thisValue.replace(/[^0-9\//]/g, '');
//get new value without letters
$(this).val(thisValue);
thisValue = $(this).val();
var numChars = thisValue.length;
$('#keyCount').html(numChars);
var thisLen = thisValue.length - 1;
var thisCharCode = thisValue.charCodeAt(thisLen);
$('#keyP').html(thisCharCode);
//To accomdate for backspacing, we detect which key was pressed - if backspace, do nothing:
if (e.which !== 8) {
if (numChars === 2) {
if (thisCharCode == 47) {
var thisV = '0' + thisValue;
$(this).val(thisV);
} else {
thisValue += '/';
$(this).val(thisValue);
}
}
if (numChars === 5) {
if (thisCharCode == 47) {
var a = thisValue;
var position = 3;
var output = [a.slice(0, position), '0', a.slice(position)].join('');
$(this).val(output);
} else {
thisValue += '/';
$(this).val(thisValue);
}
}
if (numChars > 10) {
var output2 = thisValue.slice(0, 10);
$(this).val(output2);
}
}
});
$('.date').blur(function() {
var thisValue = $(this).val();
var numChars = thisValue.length;
if (numChars < 10) {
$(this).addClass('brdErr');
$('#dateErr1').slideDown('fast');
$(this).select();
} else {
$(this).removeClass('brdErr');
$('#dateErr1').hide();
}
});
添加了很多内容,并提供了CSS类来显示无效日期的错误消息。
答案 10 :(得分:0)
对于有反应的用户,他们想要在将日期同步到状态之前对日期执行操作,可以执行以下操作:
onChangeText={(text) => {
// Format the value and remove slashes, so addItemEvery will work
let value = text.replace(/\/+/g, "");
// We substring to add / to only the first part, every two characters
const firstFourChars = addItemEvery(value.substring(0, 5), "/", 2);
value = firstFourChars + value.substring(5, value.length);
... e.g. update state
}
...
function addItemEvery(str, item, every) {
for (let i = 0; i < str.length; i++) {
if (!(i % (every + 1))) {
str = str.substring(0, i) + item + str.substring(i);
}
}
return str.substring(1);
}
答案 11 :(得分:0)
<SCRIPT LANGUAGE="JavaScript">
function addSlashes(f)
{
f.value = f.value.slice(0,2)+"/"+f.value.slice(2,4)+"/"+f.value.slice(4,7);
}
</SCRIPT>
答案 12 :(得分:-1)
这里是Jquery的更新版本。只需使用您的字段ID更改#txtDate
$(document).ready(function() {
$("#txtDate").keyup(function(){
if ($(this).val().length == 2){
$(this).val($(this).val() + "/");
}else if ($(this).val().length == 5){
$(this).val($(this).val() + "/");
}
});
});