回答編集履歴
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追記
    
        answer	
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         @@ -50,4 +50,23 @@ 
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       50 
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            ほげほげほげほげほげ
         
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            ほげほげほげほげほげ
         
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            </textarea>
         
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            ```
         
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            # 追記
         
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            ピュアなjavascriptで書くとこうです
         
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            ```javascript
         
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            window.addEventListener('DOMContentLoaded', function(e){
         
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              document.querySelector('[type=button][value=search]').addEventListener('click',function(e){
         
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                var v1= document.querySelector('#hoge').value;
         
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                var v2= document.querySelector('#fuga').value;
         
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                var start=v2.indexOf(v1);
         
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                var end=start+v1.length;
         
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                with(document.querySelector('#fuga')){
         
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                  selectionStart=start;
         
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                  selectionEnd=end;
         
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                  focus();
         
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                }
         
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              });
         
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            });
         
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            ```
         
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