浏览器对象模型(Browser Object Model,简称BOM)定义了与浏览器进行交互的方法和接口,BOM与DOM不同,其既没有标准的实现,也没有严格的定义, 所以浏览器厂商可以自由地实现BOM。BOM由多个对象组成,其中代表浏览器窗口的Window对象是BOM的顶层对象,其他对象都是该对象的子对象。 1.2、JavaScript特点 JavaScript主要被作为客...
JavaScript是一种解释执行的脚本语言,是一种动态类型、弱类型、基于原型的语言,内置支持类型,它遵循ECMAScript标准。它的解释器被称为JavaScript引擎,为浏览器的一部分,广泛用于客户端的脚本语言,主要用来给HTML增加动态功能。 几乎所有主流的语言都可以编译为JavaScript,进而能够在所有平台上的浏览器中执行,这也体现了Java...
To easily add scrollspy behavior to your topbar navigation, add data-spy="scroll" to the element you want to spy on (most typically this would be the ). Then add the data-target attribute with the ID or class of the parent element of any Bootstrap .nav component. body { position:...
constdiv =document.getElementById("my_div");constfragment =document.createDocumentFragment();constelems =document.querySelectorAll('a');for(lete =0; e < elems.length; e++) { fragment.appendChild(elems[e]); } div.appendChild(fragment.cloneNode(true)); ...
queue[0]; }; // good class PeekableQueue extends Queue { peek() { return this.queue[0]; } }9.3 Methods can return this to help with method chaining. // bad Jedi.prototype.jump = function () { this.jumping = true; return true; }; Jedi.prototype.setHeight = function (height) {...
Notice that the element in this example has a class attribute that you can use to apply CSS styles. Save the changes to your HTML file with the keyboard shortcut Control+S on Windows or Command+S on macOS. In your CSS file (main.css), add a new rule with a .btn class selector ...
td.appendChild(document.createTextNode(this.data[j])); frag2.appendChild(td); } tr.appendChild(frag2); frag.appendChild(tr); } tbody.appendChild(frag); }, addEvents:function() { $('table').on('click', 'td',function() { $(this).toggleClass('active'); ...
addClass('fat') All methods should accept an optional options object, a string which targets a particular method, or nothing (which initiates a plugin with default behavior): Copy $('#myModal').modal() // initialized with defaults $('#myModal').modal({ keyboard: false }) // ...
var box = document.getElementById('box') console.log(box) // 获取到的就是页面中的那个id 为 box 的 div 标签 1-2 getElementsByClassName getElementsByClassName是用过标签的class名称来获取标签的 因为页面中可能有多个元素的class名称一样,所以获取到的是一组元素 哪怕你获取的class只有一个,那也是...
The example above creates a class named "Car". The class has two initial properties: "name" and "year". A JavaScript class isnotan object. It is atemplatefor JavaScript objects. Using a Class When you have a class, you can use the class to create objects: ...