<fieldset> 定义了一组相关的表单元素,并使用外框包含起来 <legend> 定义了 <fieldset> 元素的标题 <select> 定义了下拉选项列表 <optgroup> 定义选项组 <option> 定义下拉列表中的选项 <button> 定义一个点击按钮 <datalist>New 指定一个预先定义的输入控件选项列表 <keygen>New 定义了表单的密钥对生成器字段...
@CHARSET “UTF-8”; #container { width: 1000px; background-color: gray; margin: 0px auto; } #header { height: 120px; background-color: red; } #main { height: 600px; background-color: yellow; } #left { width: 700px; height: 600px; float: left; background: green; } .four ...
Grayed (disabled) text. This color is set to #000 if the current display driver does not support a solid gray color. Highlight Item(s) selected in a control. HighlightText Text of item(s) selected in a control. InactiveBorder Inactive window border. ...
domInfo.innerHTML ='你的设备不支持环境光Ambient Light API'; }else{varlightValue = document.getElementById('dl-value'); window.addEventListener('devicelight',function(event) { domInfo.innerHTML ='当前环境光线强度为:'+ Math.round(event.value) +'lux';varbackgroundColor ='rgba(0,0,0,'+(1...
For this kind of task, a best practice is to define a set of global CSS variables in a CSS rule with the :root selector. In this example, you've defined three color variables. Now, you can use these variables in other CSS rules. At the end of the CSS file, replace the light-...
Color Scheme Designer by Paletton Let's Go! Full featured palette and harmony generator Visit Site Spend some time onPalettonand you'll discover its got quite an extensive set options for generating color palettes and harmonies. But if you're lazy like us just hit the randomize button at the...
To display black, set all color parameters to 0, like this: rgb(0, 0, 0). To display white, set all color parameters to 255, like this: rgb(255, 255, 255). Example rgb(255, 0, 0) rgb(0, 0, 255) rgb(60, 179, 113) ...
Filled and stroked text with a shadowBlur property set to 4: Your browser does not support the HTML5 canvas tag. <script>const canvas = document.getElementById("myCanvas"); const ctx = canvas.getContext("2d");// Shadow ctx.shadowColor = "lightblue";ctx.shadowBlur = 4;ctx.shadowOffse...
.light-theme{--bg:var(--green);--fontColor:var(--black); }.dark-theme{--bg:var(--black);--fontColor:var(--green); } In the preceding code, you defined two new variables,bgandfontColor, which specify a background and font color. These variables use thevarkeyword to set their pr...