nodeType == 1) { value = someNode.nodeName; // 会显示元素的标签名 } # 节点关系 所有关系指针都是只读的 每个节点都有一个 childNodes 属性,其中包含一个 NodeList 的实例 NodeList 是一个类数组对象,用于存储可以按位置存取的有序节点 是对DOM 结构的查询,因此 DOM 结构的变化会自动地在 NodeList 中...
functionrec(){varmymessage=confirm("你是女的吗?");if(mymessage==true){document.write("你是女士!");}else{document.write("你是男士!");}} 当点击“点击我,弹出确认对话框”按钮后,就会有“你是女的吗”的弹窗,如果点“确定”,那页面就会输出“你是女的”,如果点“取消”,就会输出“你是男的”。
value:function() {} }); Array.prototype.propertyIsEnumerable('demo');//falseObject.getOwnPropertyDescriptor(Array.prototype, 'demo');//{writable: false, enumerable: false, configurable: false}for(variincolors) { console.log(i);//输出:0 1 2}//或者使用 hasOwnPropertyvarcolors = ['red', ...
propertyName].value; } alert (message); } function ChangeTitle () { var div = document.getElementById ("myDiv"); div.title = "New Alternate"; } Change alternate text! Hover the mouse over. Copy Code Print Preview Syntax Highlighter Did you find this example helpful? yes no...
varcolors = ['red','green','blue'];Object.defineProperty(Array.prototype,'demo', {enumerable:false,value:function() {} });Array.prototype.propertyIsEnumerable('demo');// falseObject.getOwnPropertyDescriptor(Array.prototype,'demo');// {writable: false, enumerable: false, configurable: false}...
All dropdown events have a relatedTarget property, whose value is the toggling anchor element. Event TypeDescription show.bs.dropdown This event fires immediately when the show instance method is called. shown.bs.dropdown This event is fired when the dropdown has been made visible to the user...
All dropdown events have a relatedTarget property, whose value is the toggling anchor element. Event TypeDescription show.bs.dropdown This event fires immediately when the show instance method is called. shown.bs.dropdown This event is fired when the dropdown has been made visible to the user...
All dropdown events have a relatedTarget property, whose value is the toggling anchor element. Event TypeDescription show.bs.dropdown This event fires immediately when the show instance method is called. shown.bs.dropdown This event is fired when the dropdown has been made visible to the user...
is called without a name, the name will default todefault. Similarly, if thenameproperty is removed from an instance ofBaseObject, the prototype chain will then be searched and thenameproperty will be retrieved from theprototypeobject where its value is still'default'. So now we get: ...
之后我们就可以通过具体的methodName和PropertyName生成的setter和getter方法,来获取实际的SEL。最后就可以让JSExport中的方法和属性得到正确的访问。所以简单点讲,JSExport就是负责把这些方法打个标,以methodName为key,SEL为value,存入一个map(prototype和constructor本质上就是一个Map)中去,之后就可以通过methodName拿到...