ES6中 Array新增了一个静态方法 Array.from,可以把类似数组的对象转换为数组,如通过 querySelectAll方法得到 HTML DOMNodeList,以及ES6中新增的 Set和Map等可遍历对象, 由此可以实现一行代码数组去重: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 let array = Array.from(new Set([1, 1, 1, 2, 3, ...
使用new 操作符和 Object 构造函数 使用对象字面量,对象定义的简写形式,目的是为了简化包含大量属性的对象的创建 可以通过点语法或中括号来存取属性 #Array 创建方式 Array构造函数 数组字面量 静态方法,from() 和 of()。from()用于将类数组结构转换为数组实例,而of()用于将一组参数转换为数组实例 数组空位 使用...
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...
For JavaScript arrays theconstructorproperty returns: function Array() { [native code] } Syntax array.constructor Return Value function Array() { [native code] } Array Tutorials: Array Tutorial Array Const Basic Array Methods Array Search Methods ...
prototypeis a property available with all JavaScript objects. Syntax Array.prototype.name=value Warning You are not advised to change the prototype of an object that you do not control. You should not change the prototype of built in JavaScript datatypes like: ...
The version of each of Bootstrap's jQuery plugins can be accessed via the VERSION property of the plugin's constructor. For example, for the tooltip plugin: $.fn.tooltip.Constructor.VERSION // => "3.3.7" No special fallbacks when JavaScript is disabled Bootstrap's plugins don't fall ba...
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...
{@link restProtocol.IServerResponse."first-name" | the first name property}** Here is a fairly elaborate example where the function name is an ECMAScript 6 symbol,* and it's an overloaded function that uses a label selector (defined using the `{@label}`* TSDoc tag):** {@link my-...
constructor是Object其中的一个属性。默认指向实例的构造函数 通过Object.prototype.toString方法,判断某个对象值属于哪种内置类型 11、in 与 hasOwnProperty 两者都代表查看某个属性是不是自己的 in判断的是对象的所有属性,包括对象实例及其原型的属性 hasOwnProperty则是判断对象实例的是否具有某个属性 ...
BaseObject=function(name) {if(typeofname !=="undefined") {this.name= name; } };BaseObject.prototype.name='default'; With this version,BaseObjectinherits thenameproperty from itsprototypeobject, where it is set (by default) to'default'. Thus, if the constructor is called without a name,...