回答編集履歴
2
ちょうせい
test
CHANGED
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@@ -15,16 +15,27 @@
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15
15
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b.html
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16
16
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```javascript
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17
17
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<script>
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18
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+
const view=async(area)=>{
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19
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+
const url = "c.json";
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20
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+
const newLines=await fetch(url)
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21
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.then(res=>res.json())
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22
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.then(data=>data.filter(x=>x.area==area));
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23
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console.dir(area,newLines);
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24
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}
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25
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document.addEventListener('click',e=>{
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26
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const t=e.target;
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27
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if(t.matches('.btn')){
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28
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const area=t.textContent;
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29
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view(area);
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30
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}
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31
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});
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18
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-
window.addEventListener('DOMContentLoaded',
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32
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+
window.addEventListener('DOMContentLoaded', ()=>{
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19
33
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const param="x";
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20
34
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const area=new URLSearchParams(location.search.substr(1)).get(param);
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21
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-
const url = "c.json";
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22
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-
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35
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view(area);
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23
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-
.then(res=>res.json())
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24
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-
.then(data=>{
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25
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const newLines = data.filter(x=>x.area==area);
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26
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console.dir(area, newLines);
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27
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-
});
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28
36
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});
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29
37
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</script>
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38
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+
<button class="btn">近畿</button>
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39
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<button class="btn">関東</button>
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40
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<button class="btn">中部</button>
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30
41
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```
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1
調整
test
CHANGED
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@@ -1,3 +1,30 @@
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1
1
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bでbtnのcliockイベントを拾ってもボタンを押しているわけではないので反応しません
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2
2
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getUrlParamで前のページで選ばれたパラメータが検査できるのでそれをもとにjsonを呼び出してください
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3
3
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aのボタンも別々のnameではなく同じものにした方が処理はしやすいでしょう
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4
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+
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5
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+
# 参考
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6
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+
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7
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+
a.html
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8
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```html
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9
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<form method="get" action="b.html">
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10
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<button name="x" value="近畿" type="submit">近畿</button>
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11
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<button name="x" value="関東" type="submit">関東</button>
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12
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<button name="x" value="中部" type="submit">中部</button>
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13
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</form>
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14
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```
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15
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b.html
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16
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```javascript
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17
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<script>
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18
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window.addEventListener('DOMContentLoaded', async()=>{
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19
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const param="x";
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20
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const area=new URLSearchParams(location.search.substr(1)).get(param);
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21
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const url = "c.json";
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22
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fetch(url)
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23
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.then(res=>res.json())
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24
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.then(data=>{
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25
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const newLines = data.filter(x=>x.area==area);
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26
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console.dir(area, newLines);
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27
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});
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28
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});
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29
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</script>
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30
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```
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