AI代码解释 classRectangle{constructor(){this.width=0;this.height=0;}setColor(color){// ...}render(area){// ...}setWidth(width){this.width=width;}setHeight(height){this.height=height;}getArea(){returnthis.width*this.height;}}classSquareextendsRectangle{constructor(){super();}setWidth(width...
尝试将这些代码添加到 Brackets IDE 中的新 HTML 文件中。您还可以从代码存储库下载名为B04959_01_CODE01的 HTML 源代码,并双击 HTML 文件来运行它。 观察前面的代码行时,您可能已经注意到了这两件事: 我们不需要任何许可证、身份验证或密钥来运行此代码。换句话说,API 是免费的。您只需要使用 CDN 链接。 ...
function computeValue(portfolio) { let total = 0.0; for(let stock in portfolio) { // For each stock in the portfolio: let shares = portfolio[stock]; // get the number of shares let price = getQuote(stock); // look up share price total += shares * price; // add stock value to ...
To find the area and perimeter of a rectangle in JavaScript, we will be using the basic formulas for the perimeter and area of a rectangle. The area of a rectangle is the multiplication of its length by its breadth, and the perimeter of a rectangle is the sum of the lengths of all ...
letrectangle = {upperLeft: {x:2,y:2},lowerRight: {x:4,y:5} }; 我们将在第六章和第七章再次看到对象和数组初始化器。 4.3 函数定义表达式 函数定义表达式定义了一个 JavaScript 函数,这种表达式的值是新定义的函数。在某种意义上,函数定义表达式是“函数文字”的一种方式,就像对象初始化器是“对象文字...
Rectangle { setWidth(width) { this.width = width; this.height = width; } setHeight(height) { this.width = height; this.height = height; } } function renderLargeRectangles(rectangles) { rectangles.forEach((rectangle) => { rectangle.setWidth(4); rectangle.setHeight(5); const area = ...
Create area of interest for VoxelLayer Explore a VoxelLayer using isosurface Explore a VoxelLayer using dynamic section VoxelLayer with discrete variable Modify the color scheme of a continuous variable Modify the opacity of a continuous variable VoxelLayer and time Configuring the popup of a VoxelLa...
fetch(url).then(response => {for(let [name,value] of response.headers) {console.log(`${name}: ${value}`);}}); 如果Web 服务器响应你的fetch()请求,那么返回的 Promise 将以 Response 对象实现,即使服务器的响应是 404 Not Found 错误或 500 Internal Server Error。fetch()仅在无法完全联系到 ...
A fixed positioned, resizable rectangle for selecting an area on the map. Demo Jonatan Heyman Leaflet.CheapLayerAt Allows querying which layer is under a screen coordinate. Demo Iván Sánchez Ortega Leaflet.FeatureSelect Use a configurable centerpoint marker to select any geometry type from a ...
用户输入,以事件的形式,例如鼠标点击(或触摸屏点击)HTML <button> 元素,或输入到 HTML <textarea> 元素中的文本,例如。§15.2 演示了 JavaScript 程序如何响应这些用户事件。 正在显示的文档的 URL 可以作为document.URL在客户端 JavaScript 中使用。如果将此字符串传递给URL()构造函数(§11.9),您可以轻松访问 ...