--top-border: border-top; /* Can't set a property as custom property's value */ var(--top-border): 10px solid #bc84d8; /* Can't use a variable as a property */ } 你也不能把属性-值对存储为一个变量,然后重用它。下面的例子也是无效的: :root { --text-color: 'color: orange'...
:root{--top-border: border-top;/* Can't set a property as custom property's value */var(--top-border):10pxsolid#bc84d8;/* Can't use a variable as a property */} 你也不能把属性-值对存储为一个变量,然后重用它。下面的例子也是无效的: :root{--text-color:'color: orange';/* Inv...
set variable document.querySelector("h1").style.setProperty("--font-size-xs", "2rem"); 动态修改 variable 就意味着修改了 CSS Style. 非常好用. 这也是 Sass 无法做到的. 注意space 如果有用 prettier 之类的 format 工具. CSS value 通常会有一个空格在前面. 使用JavaSript 拿到的 value 也会有这个...
AI代码解释 :root{--top-border:border-top;/* Can't set a property as custom property's value */var(--top-border):10px solid #bc84d8;/* Can't use a variable as a property */} 你也不能把属性-值对存储为一个变量,然后重用它。下面的例子也是无效的: 代码语言:javascript 代码运行次数:0...
Variable default value As in the following example, the second value 1.2 separated by commas is the default value, that is, if--scaleis not assigned, the value 1.2 is used. .bigger { transform: scale(var(--scale, 1.2)); } When using thevar()function, you can assign one or more fal...
No: set to initial If no, set to initialHere is a flowchart that explains the browser’s work.Invalid at computed-value timeThe above is technically called invalid at computed-value time, which happens when the var() references a CSS variable with its initial value or it’s using a valid...
alert("The value of --blue is: "+rs.getPropertyValue('--blue')); } // Create a function for setting a variable value functionmyFunction_set() { // Set the value of variable --blue to another value (in this case "lightblue") ...
variable named --fontsize for the.containerclass. We set its value to 25 pixels. Then we use it in the.containerclass further down. Then, we create a@mediarule that says "When the browser's width is 450px or wider, change the --fontsize variable value of the.containerclass to 50px...
Using Absolute Value, Sign, Rounding and Modulo in CSS Today For quite a while now, the CSS spec has included a lot of really useful mathematical functions, such as trigonometric functions (sin(), cos(), tan(), asin(), acos(), atan(), atan2()), exponential functions (… Ana Tudor...
...: 2px solid rgba(0, 0, 0, .2); } /* 使用var函数定义变量 */ .mdiv{ --borderWidth: 8px; --borderColor: red...优先级 CSS获取变量和CSS的样式优先级一样 顺序是:!...设置变量的值 element.style.setProperty("--variableName", value); 检测是否支持变量 CSS检测: 通过@supports性能...