[英]Octothorpe (hashtag) after page URL to change input button default
這是一個示例,我有一個帶有單選按鈕的表單,默認情況下第一個被選中:
<input type=radio name="input" id="one" checked>
<input type=radio name="input" id="two">
<input type=radio name="input" id="three">
<input type=radio name="input" id="four">
當我輸入index.html#two時,如何使其默認情況下自動檢查兩個而不是一個,而當我沒有八度時,它將默認為第一個?
提前致謝!
我還沒有測試過,但是如果它不起作用,那么注解有望將您帶到正確的位置
window.onload = function() {
if(location.hash){//if the page's URL has an octothore part
document.getElementById(location.hash.substr(1)).checked=true;
//gets the checkbox's ID with the hash minus the octothorpe, and then checks it
} else {
//if there WASN't an octorthorpe
document.getElementById('one').checked=true;
}
};
如果要保持狀態:
var interval = setInterval(function(){
window.onload = function() {
if(location.hash){//if the page's URL has an octothore part
document.getElementById(location.hash.substr(1)).checked=true;
//gets the checkbox's ID with the hash minus the octothorpe, and then checks it
} else {
//if there WASN't an octorthorpe
document.getElementById('one').checked=true;
}
};
},50);
每當您希望它停止時,都可以使用interval.clear();
雖然為了代碼衛生,我還是建議:
var checkBoxBasedOnHash = function() {
if(location.hash){//if the page's URL has an octothore part
document.getElementById(location.hash.substr(1)).checked=true;
//gets the checkbox's ID with the hash minus the octothorpe, and then checks it
} else {
//if there WASN't an octorthorpe
document.getElementById('one').checked=true;
}
};
window.onload = function() {
checkBoxBasedOnHash();
var interval = setInterval(checkBoxBasedOnHash,500);
}
因為它減少了重復的代碼,並肯定了該間隔僅在復選框已加載之后發生。
HTML:
<input type="radio" name="input" id="one" />
<input type="radio" name="input" id="two" />
<input type="radio" name="input" id="three" />
<input type="radio" name="input" id="four" />
JS(需要jQuery):
$(document).ready(function() {
// Grab the hash from the URL
var hash = location.hash;
// Uncheck all the radio buttons
$("input").attr("checked", null);
// If there's a hash, check the matching radio button
if (hash) {
$("input" + hash).attr("checked", "checked");
}
// If there's not, check the first radio button
else {
$("#one").attr("checked", "checked");
}
});
要在jsfiddle中進行測試,請使用字符串替換location.hash
以假裝您正在從URL中獲取哈希,例如:
var hash = "#three";
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.