element= baseElement.querySelector(selectors); element和baseElement是element对象. selectors是一个CSS选择器字符串(selectors) 例子 下面例子,HTML 文档中没有type属性,或type属性值为text/css的第一个style元素将会被返回: var el = document.body.querySelector("style[type='text/css'], style:not([type]...
DadaGrid 是 ASP.NET 编程中一个很重要的控件，其优良的可定制功能为提高它的表现力提供了极大的方便...
let el = document.querySelector('#test'); //return an element with id='test' let matches = el.querySelectorAll('div.highlighted > p'); // return a NodeList of p wrapped in a div with attribute class "highlighted" This example returns a list ofiframeelements that contain adataattribute...
If the element isn't scrolled at all up or down, then scrollTop is 0. If the document is not the active document, the returned value is 0. If the document is rendered on a subpixel-precise device, then the returned value is also subpixel-precise and may contain a decimal component....
MDN URL https://developer.mozilla.org/en-US/docs/Web/API/Element/querySelectorAll What specific section or headline is this issue about? Examples What information was incorrect, unhelpful, or incomplete? In first example, in the HTML, the div elements set theclassname. But in the JS for th...
querySelector(".log"); const time = new Date(); const timeStr = time.toLocaleTimeString(); logElem.innerHTML += `${timeStr}: ${msg}<br/>`; } log("Logging mouse events inside this container…"); The log() function creates the log output by getting the current time from a Date...
JavaScript jsCopy to Clipboardplay constanimation=document.querySelector("p.animation");constanimationEventLog=document.querySelector(".animation-example>.event-log",);constapplyAnimation=document.querySelector(".animation-example>button.activate",);letiterationCount=0;animation.addEventListener("animationst...
querySelector('#insert'); insert.addEventListener('click', () => { const subject = document.querySelector('#subject'); const positionSelect = document.querySelector('#position'); subject.insertAdjacentHTML(positionSelect.value, '<strong>inserted text</strong>'); }); const reset = document....
querySelector("button"); button.setAttribute("name", "helloButton"); button.setAttribute("disabled", ""); play This demonstrates two things: The first call to setAttribute() above shows changing the name attribute's value to "helloButton". You can see this using your browser's page ...
Element.insertAdjacentHTML() Element.outerHTML Parsing HTML or XML into a DOM tree:DOMParser Serializing a DOM tree into an XML string:XMLSerializer Element.getHTML() ShadowRoot.getHTML() Element.setHTMLUnsafe() ShadowRoot.setHTMLUnsafe()