selector

问题 I'm trying to keep an NSTimer in the model of my application and update the time in my view controller file. To do this I created these two methods: func startTimer(labelToUpdate : UILabel) { timerGoing = true timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: "decTimeByOne:labelToUpdate:", userInfo: labelToUpdate, repeats: true) } func decTimeByOne(labelToUpdate : UILabel) { if timerGoing { if decreasingTime > 0 { decreasingTime--; labelToUpdate.text = "\

问题 I'm trying to keep an NSTimer in the model of my application and update the time in my view controller file. To do this I created these two methods: func startTimer(labelToUpdate : UILabel) { timerGoing = true timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: "decTimeByOne:labelToUpdate:", userInfo: labelToUpdate, repeats: true) } func decTimeByOne(labelToUpdate : UILabel) { if timerGoing { if decreasingTime > 0 { decreasingTime--; labelToUpdate.text = "\

问题 Is it possible with CSS3 to select an element that comes right after another? If I have, for example: <div> <a class="a">One</a> <a class="b">Two</a> <a class="c">Three</a> <a class="b">Four</a> </div> I want to select the class="b" anchor that comes after the class="a" anchor only. So I'd want the "Two" anchor selected and not the "Four" anchor. Is that possible in CSS3? If not, is it possible in jQuery? (though, I'd prefer CSS). 回答1: You don't need CSS 3 for this, it was already possible in

问题 Is it possible with CSS3 to select an element that comes right after another? If I have, for example: <div> <a class="a">One</a> <a class="b">Two</a> <a class="c">Three</a> <a class="b">Four</a> </div> I want to select the class="b" anchor that comes after the class="a" anchor only. So I'd want the "Two" anchor selected and not the "Four" anchor. Is that possible in CSS3? If not, is it possible in jQuery? (though, I'd prefer CSS). 回答1: You don't need CSS 3 for this, it was already possible in

问题 Is it possible with CSS3 to select an element that comes right after another? If I have, for example: <div> <a class="a">One</a> <a class="b">Two</a> <a class="c">Three</a> <a class="b">Four</a> </div> I want to select the class="b" anchor that comes after the class="a" anchor only. So I'd want the "Two" anchor selected and not the "Four" anchor. Is that possible in CSS3? If not, is it possible in jQuery? (though, I'd prefer CSS). 回答1: You don't need CSS 3 for this, it was already possible in

问题 Using jquery, I want to loop all elements having the class "item" and apply different background colors according to the index of the element. mapcolor is an array of colors (length = number of elements having "item" class) $.each($(".item"), function(i,e){ $("#"+e).css("background-color",mapcolor[i]); }); $("#"+e) selector doesn't work as expected, neither $("#"+e.id) ... Something's wrong with my selector. Any idea? 回答1: use .each() method instead and you have to be in the context with $

问题 I'm trying to get the tagname of name from the below line of code. I have to get the name from the below tagname using javascript <preference name="webviewbounce" value="false" /> i need to get webviewbounce This is what i know. document.getElementsByTagName("preference") But it doesnt give me the preference name . What i want is the tagname of name which is webviewbounce 回答1: Use document.querySelector to get the element. It will return the first matched element.Then use getAttribute to get

问题 This question already has answers here : querySelector, wildcard element match? (5 answers) Closed 1 year ago . I would like to select any element owning a class starting by a given string, here is an example where the classes start with fi- <i class="fi-xmsl-user"></i> <i class="fi-stsl-map"></i> I would like to do this in pure JavaScript (no jQuery). I already read the following questions: select class starting with jquery How to get all elements by class name? Jquery select first letter?

来源： https://stackoverflow.com/questions/59008962/angular-8-render-component-without-extra-wrapper-element-in-the-dom

问题 For example: <select> <option value="one">1</option> <option value="two">2</option> <option value="three">3</option> </select> I want to select the option where value = one, but I must select using the value attribute. I've tried a few variations as the ones below: option[value="one"]{ } select[value="one"]{ } select option[value="one"]{ } 回答1: option[value=two] { background-color: yellow; } <select> <option value="one">1</option> <option value="two">2</option> <option value="three">3</option