target) { throw new TypeError('init is not a constructor'); } var fun = function () { console.log(this.name); } fun.call(this); } }) 解析:此题的关键在于是否清楚 ES6 的 class 和普通构造函数的区别,记住它们有以下区别,就不会有遗漏: ...
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } } 这个函数特别简单,当执行函数A的时候,不允许this不是A的子类实例,比如直接这样调用A(),但是在A的子类B中可以这样调用:A.apply(this, arguments...
function _classCallCheck(instance, Constructor) { // 检查是否成功创建了一个对象 if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } } var Person = function Person() { _classCallCheck(this, Person); }; 你可能会一头雾水,_classCallCheck...
}();function_classCallCheck(instance, Constructor) {if(!(instanceinstanceofConstructor)) {thrownewTypeError("Cannot call a class as a function"); } }function_possibleConstructorReturn(self, call) {if(!self) {thrownewReferenceError("this hasn't been initialised - super() hasn't been called")...
interfaceBar{}@dclassFoo{@dstaticstaticMember=1@d member=2@dmethod(foo:number,bar:Bar,baz:Foo):string{}constructor(a:Bar){}} 转换结果: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 var__metadata=(this&&this.__metadata)||function(k,v){if(typeofReflect==='object'&&typeofReflect....
I am trying to call an ActionScript 3 function with JavaScript. The problem I cannot seem to get any of the browsers to trigger this AS3 function. The debuggers say that the function is undefined when I call it on the flash object. What is supposed to happen is - the javascript func...
A callback function in JavaScript is a function that is passed as an argument to another function and is invoked after some kind of event.
on('shown.bs.modal', function () { $('#myInput').focus() }) 实例 静态实例 以下模态框包含了模态框的头、体和一组放置于底部的按钮。 × Modal title One fine body… Close Save changes <div class="modal fade" tabindex="-1" role="dialog"> <div class="modal-dialog" role="document...
on('shown.bs.modal', function () { $('#myInput').focus() }) Examples Static example A rendered modal with header, body, and set of actions in the footer. × Modal title One fine body… Close Save changes <div class="modal fade" tabindex="-1" role="dialog"> <div class="...
your taxes! Order yours today! Call now: 555-WIDG </p> </div> <divstyle="display:none"id="tab2"> <ulclass="tab"> <lionclick="ShowImage(1, 'tab');"> Summary </li> <liclass="tab_selected"onclick="ShowImage(2, 'tab');"> ...