element.classList.contains(class); This works on all current browsers and there are polyfills to support older browsers too. Alternatively, if you work with older browsers and don’t want to use polyfills to fix them, usingindexOfis correct, but you have to tweak it a little: function h...
In JavaScript, you can use thecontains()method provided by theclassListobject to check if any element contains a specific CSS class. This method returnstrueif the class exists. Otherwise,falseis returned. Let us say we have the following HTML element: Subscribe Now And we want to check if ...
functioncheckout(name, movie, filmList, customerList) {if(movieList.contains(movie)) {varc =newCustomer(name, movie); customerList.append(c); filmList.remove(movie) }else{ console.log(movie+ "is not available") } } 下面使用简单的代码测试checkout函数 varmovies =createArr(_movies);varmovi...
问Javascript contains -检查多个值EN
If activated 'template', 'content' and 'title' options will be sanitized. whiteList object Default value Object which contains allowed attributes and tags sanitizeFn null | function null Here you can supply your own sanitize function. This can be useful if you prefer to use a dedicated library...
function isElementInViewport (el) { //special bonus for those using jQuery if (typeof jQuery === "function" && el instanceof jQuery) { el = el[0]; } var rect = el.getBoundingClientRect(); return ( rect.top >= 0 && rect.left >= 0 && rect.bottom <= (wind...
fnGetVersion(),fnSubmitForm(),fnInit();涉及返回逻辑值的函数可以使用is,has,contains等表示逻辑的词语代替动词,例如:fnIsObject(),fnHasClass(),fnContainsElment()。 内部函数:使用_fn+动词+名词形式,内部函数必需在函数最后定义。 例如: 代码语言:javascript ...
If activated 'template', 'content' and 'title' options will be sanitized. whiteList object Default value Object which contains allowed attributes and tags sanitizeFn null | function null Here you can supply your own sanitize function. This can be useful if you prefer to use a dedicated library...
const win= window, doc =document, height, rects;if(!elem || (elem && elem.nodeType !== 1) || !elem.getClientRects || !doc.elementFromPoint || !doc.querySelector || !elem.contains) {returnfalse; }if(elem.offsetWidth === 0 || elem.offsetHeight === 0) {returnfalse; ...
If activated 'template', 'content' and 'title' options will be sanitized. whiteList object Default value Object which contains allowed attributes and tags sanitizeFn null | function null Here you can supply your own sanitize function. This can be useful if you prefer to use a dedicated library...