Most HTML events are related to window objects and form controls. Except for DOMActivate, everything else is classified as HTML Events in DOM2 Events. (DOMActivate is a UI event) FocusEvent Fires when a page element gains or loses focus. Can be combined with document.hasFocus() and documen...
mathematical calculations and array processing. JavaScript expressions can be used in business objects, event objects (in event field constructors) and action objects. The result is a value that is evaluated by the event runtime during event rule evaluation (for events and business objects...
event.preventDefault();//例如ctrl+w是无法被prevent的}); 7、Key events This page turns violet when you hold the V key.window.addEventListener("keydown", event=>{if(event.key=="v") { document.body.style.background="violet"; console.log("repeat");//只要按住就会不断触发,而不是仅触发一次...
In this article, we will go over event handlers, event listeners, and event objects. We’ll also go over three different ways to write code to handle events, and a few of the most common events. By learning about events, you’ll be able to make a more interactive web experience for e...
The World Wide Web Consortium (W3C) categorizes events into three distinct areas: user interface (mouse, keyboard), logical (result of a process), and mutation (action that modifies a document). Table 7-1 lists some basic events, their descriptions, and the affected objects. Table 7-1. ...
selector string false if a selector is provided, tooltip objects will be delegated to the specified targets trigger string 'click' how popover is triggered - click | hover | focus | manual title string | function '' default title value if `title` attribute isn't present content string | ...
W3Schools maintains a complete JavaScript reference, including all HTML and browser objects. The reference contains examples for all properties, methods and events, and is continuously updated according to the latest web standards. Track your progress - it's free!
selector string false If a selector is provided, tooltip objects will be delegated to the specified targets. In practice, this is used to also apply tooltips to dynamically added DOM elements (jQuery.on support). See this and an informative example. template string '' Base HTML to use when...
prototypeLet you to add properties and methods to JavaScript objects seal()Prevents adding new or deleting existing object properties toString()Converts an object to a string and returns the result valueOf()Returns the primitive value of an object ...
https://developer.mozilla.org/zh-CN/docs/Web/Events 1. 2. 条件语句: if (choice === 'sunny') { para.textContent = '阳光明媚。穿上短裤吧!去海滩,或公园,吃个冰淇淋。'; } else if (choice === 'rainy') { para.textContent = '外面下着雨;带上雨衣和雨伞,不要在外面呆太久。'; ...