你有更好的方法来创建这个if/elseif句子吗?
if ((navigator.userAgent.indexOf('Opera') || navigator.userAgent.indexOf('OPR')) != -1) {
this.state.isBrowserAllowed = true;
} else if (navigator.userAgent.indexOf('Chrome') != -1) {
this.state.isBrowserAllowed = true;
} else if (navigator.userAgent.indexOf('Safari') != -1) {
this.state.isBrowserAllowed = true;
} else if (navigator.userAgent.indexOf('Firefox') != -1) {
this.state.isBrowserAllowed = true;
}
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