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使网页显示动态效果并实现与用户交互功能。 function add(){ var p1 = document.getElementById("p1"); p1.className="one"; } function modify(){ var p2 = document.getElementById("p2"); p2.className="two"; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14...
JavaScript makes it relatively easy to manipulate the DOM (i.e., add, modify, and remove elements), but does nothing to promote doing so efficiently. A common example is code that adds a series of DOM elements one at a time. Adding a DOM element is an expensive operation, and code tha...
{"k":"[[ClassFieldInitializerName]]","v":6} {"k":"[[Namespace]]","v":6} {"k":"[[Object]]","v":6} {"k":"[[ObjectWasVisited]]","v":6} {"k":"[[AsyncGeneratorContext]]","v":6} {"k":"[[ModifyOp]]","v":6} {"k":"[[Gap]]","v":6} {"k":"[[PromiseI...
Specifies or retrieves which part of the contents of an element can be modified by the user. This property is the same as the user-modify property in the CSS3 declaration. The MozUserModify property does not seem to work in Firefox.
Javascript hasOwnProperty: A Powerful Property Checking tool Dealing With Objects in JavaScript With Object.assign, Object.keys and hasOwnProperty Copying Objects in JavaScript ― Orinami Olatunji JavaScript: Object.assign() — Thiago S. Adriano How to deep clone a JavaScript Object — Flavio Copes...
functionsum(a,b){console.log(this===window);// => truethis.myNumber=20;// add 'myNumber' property to global objectreturna+b;}// sum() is invoked as a function// this in sum() is a global object (window)sum(15,16);// => 31window.myNumber;// => 20 ...
The mapbox-gl.js script can safely populate the element and modify its contents. Use this technique with any JS library that renders UI. You can embed components from a third-party JS SPA framework inside Razor components, as long as they don't try to reach out and modify other pa...
constp1 =newPerson('fatfish')console.log(p1.money)// 1console.log(p1._money)// 1p1._money =2// Modify private property _money from outsideconsole.log(p1.money)// 2console.log(p1._money)// 2 我们可以使用“#”来实...
} set age(value) { // ... } } // good class Dragon { getAge() { // ... } setAge(value) { // ... } }24.3 If the property/method is a boolean, use isVal() or hasVal(). // bad if (!dragon.age()) { return false; } // good if (!dragon.hasAge()) { return ...