getPropertyValue(propertyName),返回属性 propertyName 的字符串值 item(index),返回索引为 index 的 CSS 属性名 removeProperty(propertyName),从样式中删除 CSS 属性 propertyName,使用这个方法删除属性意味着会应用该属性的默认(从其他样式表层叠继承的)样式 setProperty(propertyName, value, priority),设置 CSS 属性...
可枚举属性 enumerable值为 true,Object对象的propertyIsEnumerable()方法可以判断此对象是否包含某个属性,并且这个属性是否可枚举。可以通过for...in , Object.keys, Json.stringify 方法枚举。 for...in获取自身可枚举属性 varprops = [];for(vari obj){if(obj.hasOwnProperty(obj[i]){ props.push(obj[i])...
Supply a class name as a string. (optional) Supply a node. This can be obtained bygetElementById, or simply by just throwing in "document" (it will be document if don't supply a node)). It's mainly useful if you know your parent and you don't want to loop through the entire D...
--通过name获取-->document.getElementsByTagName("input")<!--通过TagName获取--> 2、innerHTML 属性:innerHTML 属性用于获取或替换 HTML 元素的内容。语法如下:Object.innerHTML案例: 代码语言:javascript 复制 javascriptvarmychar=document.getElementById("con");// 获取h2元素document.write("原标题:"+mycha...
其实for..in操作的主要目的就是遍历对象的属性,如果只需要获取对象的实例属性,可以使用hasOwnProperty()进行过滤。 functionPerson(name, age) {this.name =name;this.age =age; } Person.prototype.getName=function() {returnthis.name; }//实例化varjenemy =newPerson('jenemy', 25);for(varpropinPerson)...
var searchResults = context.document.body.search('video you', {ignorePunct: true}); // Queue a command to load the search results and get the font property values. context.load(searchResults, 'font'); // Synchronize the document state by executing the queued commands, // and return a ...
[keyName] – JavaScript developers can set and get values in anIDictionaryby using this syntax. They can also access scriptable property values on custom .NET Framework types by using the scriptable property names as the value of keyName. SeePassing JavaScript Objects to Managed Codefor informatio...
When HelloHelper is created, the name in the Name property is used to return a message from GetHelloMessage.HelloHelper.cs:C# Copy using Microsoft.JSInterop; namespace BlazorSample; public class HelloHelper(string? name) { public string? Name { get; set; } = name ?? "No Name";...
3.2 Use computed property names when creating objects with dynamic property names. Why? They allow you to define all the properties of an object in one place. function getKey(k) { return `a key named ${k}`; } // bad const obj = { id: 5, name: 'San Francisco', }; obj[getKey...
function addFieldToList(siteUrl) { var clientContext = new SP.ClientContext(siteUrl); var oList = clientContext.get_web().get_lists().getByTitle('Announcements'); this.oField = oList.get_fields().addFieldAsXml( '<Field DisplayName=\'MyField\' Type=\'Number\' />', true, SP.AddFi...