css-selectors

问题 I am working with selenium in python 3.6 on the chrome browser. I have programmed it to the point where I can access the website I want but I am struggling to find the text box element I am searching for. When I inspect the element it has this code. <input placeholder="" id="ember32" class="ssRegistrationField ssEmailTextboxField ember-text-field ember-view" type="email"> But when I try and use the given ID, it does not work and says that it cannot be found. Here is my code (Without the text

问题 The structure of my HTML is like so <div> <div> <h1>Something</h1> </div> <div> <h1 class='Handle'>Something</h1> </div> </div> In the event that the div > div does not have a child with the class "Handle" I want the the div > div to have the style cursor:move; . How would I go about doing this in pure CSS, is it even possible? 回答1: This would work, except no browser currently supports it as far as I am aware. jQuery does though, however. div > div:not(:has(h1.Handle)) { cursor: move; } 回答2:

问题 I have been reading about CSS the last couple of days, and searched the internet for this question. Could anyone please explain me whats the difference between (~) and (>)? 回答1: General sibling means the element is after another element, where the child selector targets elements that are directly inside of certain elements. Siblings: HTML: <div class="brother"></div> <div class="sister"></div> CSS: .brother ~ .sister { /* This styles .sister elements that follow .brother elements */ }

问题 I have been reading about CSS the last couple of days, and searched the internet for this question. Could anyone please explain me whats the difference between (~) and (>)? 回答1: General sibling means the element is after another element, where the child selector targets elements that are directly inside of certain elements. Siblings: HTML: <div class="brother"></div> <div class="sister"></div> CSS: .brother ~ .sister { /* This styles .sister elements that follow .brother elements */ }

问题 I have been reading about CSS the last couple of days, and searched the internet for this question. Could anyone please explain me whats the difference between (~) and (>)? 回答1: General sibling means the element is after another element, where the child selector targets elements that are directly inside of certain elements. Siblings: HTML: <div class="brother"></div> <div class="sister"></div> CSS: .brother ~ .sister { /* This styles .sister elements that follow .brother elements */ }

问题 I have been reading about CSS the last couple of days, and searched the internet for this question. Could anyone please explain me whats the difference between (~) and (>)? 回答1: General sibling means the element is after another element, where the child selector targets elements that are directly inside of certain elements. Siblings: HTML: <div class="brother"></div> <div class="sister"></div> CSS: .brother ~ .sister { /* This styles .sister elements that follow .brother elements */ }

问题 I have been reading about CSS the last couple of days, and searched the internet for this question. Could anyone please explain me whats the difference between (~) and (>)? 回答1: General sibling means the element is after another element, where the child selector targets elements that are directly inside of certain elements. Siblings: HTML: <div class="brother"></div> <div class="sister"></div> CSS: .brother ~ .sister { /* This styles .sister elements that follow .brother elements */ }

问题 I would like to style a class based on another class not existing in the ancestors. div:not(.evil-class) .element { background-color: green; } <div class="evil-class"> <div class="element">An element within the evil class</div> </div> <div class="element">An element NOT in the evil class</div> Not sure why that doesn't work? I'm aware I can do the inverse; apply a style to both elements and then overwrite that style, but I'd rather not do that as I'd be overwriting styling which could change

问题 I would like to style a class based on another class not existing in the ancestors. div:not(.evil-class) .element { background-color: green; } <div class="evil-class"> <div class="element">An element within the evil class</div> </div> <div class="element">An element NOT in the evil class</div> Not sure why that doesn't work? I'm aware I can do the inverse; apply a style to both elements and then overwrite that style, but I'd rather not do that as I'd be overwriting styling which could change

问题 If I have multiple div tags with an attribute containing different numbered values, and I would like to select only number 1 through 10, what is the most efficient way to do this in css? Is there anything like e.g. .div[line-number=1-10] ? 回答1: This is not possible in the standard CSS. It is convenient to use a CSS preprocessor like SASS or LESS which allow you creating loops among many other features. An example with SASS: $selector: '.div'; @for $i from 1 to 10 { $selector: $selector + '