https://developer.mozilla.org/en-US/docs/Web/CSS/Reference#Selectors 在css3规范中,定义了以下几种类型的selector: Basic selector type selector: elementname class selector: .classname ID selector: #idName universal selector:
CSS [attribute~="value"] Selector The[attribute~="value"]selector is used to select elements with an attribute value containing a specified word. The following example selects all elements with a title attribute that contains a space-separated list of words, one of which is "flower": ...
Selector [attribute=value]4.07.02.03.19.6 CSS Syntax [attribute=value] { css declarations; }Demo More Examples Example Set the width of an <input type="text"> element to 100px. However, when it gets focus, make it 250px wide:
The “Password” text box has an ID attribute whose value is defined as “Passwd”, type attribute whose value is defined as “password”. Thus, ID attribute, type attribute, and their values can create the CSS Selector to access the designated web element. Creating a CSS Selector for web...
CSS [attribute~="value"] Selector The[attribute~="value"]selector is used to select elements with an attribute value containing a specified word. The following example selects all elements with a title attribute that contains a space-separated list of words, one of which is "flower": ...
Selects all elements that have the given attribute, regardless of its value. [name="value"] Selects all elements that have the given attribute, whose value is the string value. [name~="value"] Selects all elements that have the given attribute, whose value contains the string value separat...
:not(selector)：选中不匹配给定选择器的元素。例如，div:not(.active)选中所有没有.active类的<div>元素。特殊状态选择器：:empty：选中没有任何子元素（包括文本节点）的元素。:target：选中URL中指定id的元素。例如，如果URL是http://example.com/#section1，则:target会选中id为section1的元素。
<label class="hidden-label" for="Email">Test Class selector: </label> <input id="Passwd-hidden" class="password" type="password" spellcheck="false"> </div> <div> <label class="hidden-label" for="Test attribute">Test attribute: </label> ...
5.2 Selector syntax选择器语法Asimple selectoris either atype selectororuniversal selectorfollowed immediately by zero or moreattribute selectors,ID selectors, orpseudo-classes, in any order. The simple selector matches if all of its components match. 一个简单选择器可以是一个类型选择器或通用选择器...
所以,async 函数返回的是一个 Promise 对象。从文档中也可以得到这个信息。async 函数(包含函数语句、函数表达式、Lambda表达式)会返回一个 Promise 对象,如果在函数中return一个直接量,async 会把这个直接量通过Promise.resolve()封装成 Promise 对象。 await 到底在等啥 ...