回答編集履歴
1
調整
answer
CHANGED
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@@ -14,4 +14,46 @@
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14
14
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</select>
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15
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16
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<input name="color_name" type="text" id="color_name" value="">
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17
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```
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18
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+
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19
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# 調整版
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20
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入力欄に100、200、300のどれかを入れるとselectが変化し、表示欄に値が表示される
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21
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```javascript
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22
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<script>
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HTMLElement.prototype.trigger=function(eventStr){
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24
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if (document.createEvent) {
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var e = document.createEvent("HTMLEvents");
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e.initEvent(eventStr, true, true );
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return this.dispatchEvent(e);
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} else {
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var e = document.createEventObject();
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return this.fireEvent("on"+eventStr, e);
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}
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};
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window.addEventListener('DOMContentLoaded', function(e){
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document.querySelector('#inp').addEventListener('keyup',function(e){
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35
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var v=e.target.value;
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36
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var c={"100":"red","200":"yellow","300":"blue"};
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if(typeof c[v]!=="undefined"){
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document.querySelector('#color').value=c[v];
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}else {
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document.querySelector('#color').value="";
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}
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document.querySelector('#color').trigger('change');
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});
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document.querySelector('#color').addEventListener('change',function(e){
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45
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var t=e.target;
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46
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document.querySelector('#color_name').value=t.selectedIndex==0?"":t.options[t.selectedIndex].textContent;
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47
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});
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});
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</script>
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50
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<select name="color" id="color">
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51
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<option value="">選択</option>
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<option value="red">赤</option>
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<option value="yellow">黄</option>
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54
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<option value="blue">青</option>
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55
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</select><br>
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56
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入力：<input type="text" id="inp" value=""><br>
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57
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表示：<input name="color_name" type="text" id="color_name" value="" readonly>
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58
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```
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