有品位的JS开发者特征

1 对函数参数是否为方法引用的判断

   

var evalWXjsApi = function(jsApiFun) {
    if (typeof WeixinJSBridge == "object" && typeof WeixinJSBridge.invoke == "function") {
        jsApiFun();
    } else {
        document.attachEvent && document.attachEvent("WeixinJSBridgeReady", jsApiFun);
        document.addEventListener && document.addEventListener("WeixinJSBridgeReady", jsApiFun);
    }
}