回答編集履歴
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sample
answer
CHANGED
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@@ -1,1 +1,62 @@
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1
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クッキーにでも保存しておけばよいのでは？
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1
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+
クッキーにでも保存しておけばよいのでは？
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2
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3
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# sample
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4
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5
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こんな感じでどうでしょう
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6
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```javascript
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7
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<script>
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8
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const setCookie=(key,val)=>{
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var tmp = key+"="+encodeURIComponent(val)+";";
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tmp += "expires=Fri, 31-Dec-2030 23:59:59;";
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document.cookie = tmp;
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};
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const getCookie=key=>{
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var ret=null;
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var params = document.cookie.split(/; */);
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params.forEach(x=>{
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if(r=x.match(new RegExp("^"+key+"="+"(.*)"))){
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ret=decodeURIComponent(r[1]);
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}
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});
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return ret;
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};
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const delCookie=key=>{
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expiredate = new Date();
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expiredate.setFullYear(expiredate.getFullYear()-1);
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tmp = key+"=;";
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tmp += "expires="+expiredate.toGMTString();
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document.cookie = tmp;
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};
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const arr = [
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{cd:"1", label:"いち"},
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{cd:"2", label:"に"},
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{cd:"3", label:"さん"},
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{cd:"4", label:"よん"},
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{cd:"5", label:"ご"},
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];
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window.addEventListener('DOMContentLoaded', ()=>{
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const number=document.querySelector("#number");
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arr.forEach(x=>{
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const op=Object.assign(document.createElement("option"),{
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value:x.cd,textContent:x.label});
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number.appendChild(op);
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});
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number.addEventListener('change',e=>{
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setCookie('number',number.value);
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});
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var v=getCookie('number');
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if(v) number.value=v;
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});
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</script>
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<form:select path="number">
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<select id="number"></select>
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<span id="hiddenNumber" class="disNon"><c:out value="${entry.numberList}" /></span>
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</form:select>
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<a href="next.html">next</a>
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```
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59
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- next.html
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60
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```html
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61
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<a href="javascript:history.back()">back</a>
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62
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```
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