[英]Local Storage form in HTML5
我正在嘗試將數字存儲到具有購物車類型的網站的本地存儲中...我發現了一些示例,在這些示例中可以存儲文本/電子郵件,但是當我嘗試將其存儲為數字而不是文本或更改表格名稱時,似乎沒有用。
這是我在網站上制作的用於捕獲數據的表格,其次是javascript,它應填充來自另一個會話的已保存數據,捕獲數據和(當前在提交時重置)數據。
<form id="localStorageCart" method="post" action="">
<label>Rooster:</label>
<input type="number" name="roosterQ" id="roosterQ" class="stored" min="0" max="99" step="1" value ="0" /><br>
<label>Cow:</label>
<input type="number" name="cowQ" id="cowQ" class="stored" min="0" max="99" step="1" value ="0" /><br>
<label>Cat:</label>
<input type="number" name="catQ" id="catQ" class="stored" min="0" max="99" step="1" value ="0" /><br>
<label>Sheep:</label>
<input type="number" name="sheepQ" id="sheepQ" class="stored" min="0" max="99" step="1" value ="0" /><br>
<label>Dumpster:</label>
<input type="number" name="dumpsterQ" id="dumpsterQ" class="stored" min="0" max="99" step="1" value ="0" /><br>
<label>Dog:</label>
<input type="number" name="dogQ" id="dogQ" class="stored" min="0" max="99" step="1" value ="0" /><br>
<label>Horse:</label>
<input type="number" name="horseQ" id="horseQ" class="stored" min="0" max="99" step="1" value ="0" /><br>
<input type="submit" class="submitOrder" value="Submit" />
</form><br>
<br>
<script type="text/javascript">
$(document).ready(function () {
function init() { /* checks for stored data and fills in... */
if (localStorage["roosterQ"]) {
$('#roosterQ').val(localStorage["roosterQ"]);
}
if (localStorage["cowQ"]) {
$('#cowQ').val(localStorage["cowQ"]);
}
if (localStorage["catQ"]) {
$('#catQ').val(localStorage["catQ"]);
}
if (localStorage["sheepQ"]) {
$('#sheepQ').val(localStorage["sheepQ"]);
}
if (localStorage["dumpsterQ"]) {
$('#dumpsterQ').val(localStorage["dumpsterQ"]);
}
if (localStorage["dogQ"]) {
$('#dogQ').val(localStorage["dogQ"]);
}
if (localStorage["horseQ"]) {
$('#horseQ').val(localStorage["horseQ"]);
}
}
init();
});
$('.stored').keyup(function () { /* keyup runs when key is pressed in a form with "stored"... Write to LS */
localStorage[$(this).attr('name')] = $(this).val();
});
$('#localStorageCart').submit(function() { /* currently resets all LS data*/
localStorage.clear();
});
</script>
localStorage
只能保存字符串,因此,如果要存儲數字,則需要鍵入convert
var num = 1.5, str;
// Number to string, would be done implicitly by localStorage
str = num.toString();
// String to number
num = +str; // note nothing infront of the + sign.
// OR
// num = window.parseFloat(str,10); // or parseInt if you want integers
console.log(num, str);
// 1.5 "1.5"
或更改似乎不起作用的表單名稱
您是否也在更新init
? 為了避免以后再執行此操作,它應該循環.stored
而不是通過id單獨獲取每個。
如果您仍然想通過localstorage進行操作,則可能需要在存儲變量之前檢查json.stringify
var obj = { 'a': 1, 'b': 2, 'c': 3 };
localStorage.setItem('obj', JSON.stringify(obj));
無論如何,您打算做什么? 您是否只是想保留該字段以供下次使用或重新加載頁面?
如果是這樣,您可能要嘗試使用此插件Sisyphus http://simsalabim.github.com/sisyphus/
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