[FIX] ws doc: language switcher in some iOS versions
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@ -106,8 +106,10 @@ $(function () {
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// programming language switcher
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function findSheet(pattern, fromSheet) {
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if (fromSheet) {
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for(var i=0; i<fromSheet.cssRules.length; ++i) {
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var rule = fromSheet.cssRules[i];
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// cssRules may be `null` in iOS safari (?)
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var rules = fromSheet.cssRules || [];
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for(var i=0; i<rules.length; ++i) {
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var rule = rules[i];
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if (rule.type !== CSSRule.IMPORT_RULE) { continue; }
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if (pattern.test(rule.href)) {
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return rule.styleSheet;
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