selector

Let's say I want to find all div elements and span inside p . Is it possible to get all what I want in a single `querySelectorAll" invocation? Conceptually it should be something like document.querySelectorAll("div | p span") (if | means or ). Yes. You can use the same logical operators allowed in CSS: OR: chain selectors with commas document.querySelectorAll('div, p span'); // selects divs, and spans in ps AND: chain selectors without whitespace document.querySelectorAll('div.myClass'); // selects divs with the class "myClass" NOT: :not() -selector document.querySelectorAll('div:not(.myClass)

Maybe you guys can help me out with this, I've been struggling with it for the past 30 minutes. Let's say I have four elements with the same class. <div class="test">hi</div> <div class="test">hey</div> <div class="test">yo</div> <div class="test">What's up</div> How can I select the one that was clicked on? I was able to get it work like this: $('.test').click(function() { $(this).toggleClass("btn-danger btn-success"); }); However, I need it to fire without being clicked on success after an ajax call, so I need to be able to do something like this (failed attempts): $('.test', this)

I want to rewrite all messages in my code, I need replace only selectors, but I need be able to replace nested expressions f. e. : [super foo:[someInstance someMessage:@""] foo2:[someInstance someMessage2]]; I tried do it with clang::Rewriter replaceText and just generate new string, but there is a problem: It would not be work if I change selectors length, because I replace nested messages with those old positions. So, I assumed that I need to use clang::Rewriter ReplaceStmt(originalStatement, newStatement); I am using RecursiveASTVisitor to visit all messages, and I want to copy those

What does & refer to in an scss selector? //Case 1 .parent { & > ul { color: red } } //Case 2 .parent { & > ul { & > li { color: blue; } } } //Case 3 .parent { & > ul { & > li { color: blue; &:hover { color: pink } } } } andreas The & is a placeholder for the parent selector: .parent { & > ul { color: red } } Is the same like .parent > ul { color: red } A common use case are pseudo classes, e.g.: .link { &:hover { color: red } } A nice explanation with examples can be found on CSS Tricks . 来源： https://stackoverflow.com/questions/38804099/what-does-the-mean-in-an-scss-selector

I have the following div and I know the selector Id of the DIV. <div class="event"><img src="/Content/Images/Icons/calendar16.png">Event Name</div> but I don't know what the image is. I need something to find the image selector inside the div that i have so i can go change the source of the image to a new image. $('.event').children('img').attr('src', '<source here>'); This selects all the elements with the event class and then finds their children img elements. If you have multiple matches and want to change their sources differently then you can use $.each() to iterate through them.