回答編集履歴
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ActiveXObject\(\) のコード例を追加
test
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@@ -5,3 +5,39 @@
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- [try...catch - JavaScript | MDN](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Statements/try...catch)
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**ActiveXObject() の例外をcatchして静かに実行させる**
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IE の独自拡張である `ActiveXObject()` は存在しない `servername` を引数にとると例外が発生する為、`try-catch` で静かに実行させます。
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```JavaScript
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if (typeof XMLHttpRequest !== 'function' && typeof XMLHttpRequest !== 'object') {
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var xhr;
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for (i = 0, servername = ['Msxml2.XMLHTTP.6.0', 'Msxml2.XMLHTTP.3.0')], l = servername.length; i < l; i++) {
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try {
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xhr = new ActiveXObject(servername[i]);
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break;
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}
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catch (error) {}
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}
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}
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```
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