或者，您可以使用jQuery自己的实现：var className = " " + selector + " ";if ( (" " + eleme...
1functionhasClass(element, cls) {2varclassName = " " + cls + " ",3rclass = /[\t\n\r\f]/g;4if(element.nodeType === 15&& (" " + element.className + " ").replace(rclass, " ").indexOf(className) >= 0) {6returntrue;7}//end if8returnfalse;9}//end hasClass()...
And we want to check if the element has the active class. Here's how to do this in two simple steps. Grab the element from the DOM: const button = document.querySelector("button"); Use element.classList.contains method to check for a class: // returns 'true' if the class exists...
functionhasClass(element, className){ varaSameClassEle =document.getElementsByClassName(className); for(vari=0; i < aSameClassEle.length; i++) { if(aSameClassEle[i] === element) { returntrue; } } returnfalse; } 好了,这样在判断一个元素是否含有某个样式的时候,就有不同的方法可以用了。如...
nextStep:function(){constelement =this.$el.querySelector("#conversation__tram-1 input");if(element has theclassofis-valid) { Do something } }, }, 如您所见,我想检查输入字段是否具有is-valid类。你能想到我可以用 Vue.js 做到这一点的任何方法吗?谢谢。
if ( $('#MyElement').hasClass('MyClass') ) $('#MyElement').toggleClass('MyClass'); 使用HTML5 操作 classes 现代浏览器都支持使用classList方法来操作元素的className,但是IE10中不支持该方法,即使使用了shim document.getElementById("MyElement").classList.add('class'); ...
Class(element,csName){if(!hasClass(element,csName)){element.className+=' '+csName;}addClass(odiv,'div3');//这样就可以灵活给元素添加样式了;【元素删除指定样式】//同样先进行判断,在进行删除varodiv=document.getElementById('div1');functionhasClass(element,csName){returnelement.className.match(...
root= rid && document.getElementById(rid) ||document;if(root.getElementsByClassName) {returnroot.getElementsByClassName(cls); } tag= tag || '*';varelems =root.getElementsByTagName(tag);varret =[];for(vari = 0, len = elems.length; i < len; i++) {varelem =elems[i];if((' ' +...
if (Math.abs(n) === Infinity) { n = 0; } if (n >= len) { return -1; } k = Math.max(n >= 0 ? n : len - Math.abs(n), 0); while (k < len) { if (k in o && o[k] === searchElement) { return k;
if (c > 0) { window.requestAnimationFrame(scrollToTop); window.scrollTo(0, c - c / 8); } }; scrollToTop(); 18.smoothScroll:滚动到指定元素区域 该代码段可将指定元素平滑滚动到浏览器窗口的可见区域。 const smoothScroll = element => ...