1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
---
title: CSS Functional Notation
slug: Web/CSS/CSS_Functions
tags:
- CSS Function
- CSS 函数
- attr()
- calc()
- minmax()
- var()
translation_of: Web/CSS/CSS_Functions
---
<div>{{CSSRef}}</div>
<p><strong>CSS 功能符号</strong>是一种 <a href="/en-US/docs/Web/CSS/CSS_Values_and_Units">CSS 值</a>，可以表示更复杂的数据类型或调用特殊的数据处理或计算。</p>
<h2 id="句法">句法</h2>
<pre class="syntaxbox notranslate">selector {
property: functional-notation( [argument]? [, argument]! );
}</pre>
<p>The syntax starts with the <strong>name of the functional notation</strong>, followed by a left parenthesis <code>(</code>. Next up are the notation argument(s), and the function is finished off with a closing parenthesis <code>)</code>.</p>
<p>Functions can take multiple arguments, which are formatted similarly to CSS property values. Whitespace is allowed, but they are optional inside the parentheses. In some functional notations multiple arguments are separated by commas, while others use spaces.</p>
<h2 id="索引">索引</h2>
<p>Functional notation defined by a set of CSS specifications includes the following:</p>
<div class="index"><span>A</span>
<ul>
<li>{{CSSxRef("abs", "abs()")}} (math) {{Experimental_Inline}}</li>
<li>{{CSSxRef("acos", "acos()")}} (math) {{Experimental_Inline}}</li>
<li>{{CSSxRef("font-variant-alternates/annotation()", "annotation()")}} (font)</li>
<li>{{CSSxRef("asin", "asin()")}} (math) {{Experimental_Inline}}</li>
<li>{{CSSxRef("atan", "atan()")}} (math) {{Experimental_Inline}}</li>
<li>{{CSSxRef("atan2", "atan2()")}} (math) {{Experimental_Inline}}</li>
<li>{{CSSxRef("attr")}}</li>
</ul>
<span>B</span>
<ul>
<li>{{CSSxRef("filter-function/blur", "blur()")}} (filter)</li>
<li>{{CSSxRef("filter-function/brightness", "brightness()")}} (filter)</li>
</ul>
<span>C</span>
<ul>
<li>{{CSSxRef("calc")}} (math)</li>
<li>{{CSSxRef("font-variant-alternates/character-variant()", "character-variant()")}} (font)</li>
<li>{{CSSxRef("circle", "circle()")}} (shape)</li>
<li>{{CSSxRef("clamp")}} (math)</li>
<li>{{CSSxRef("color()")}} (colors) {{Experimental_Inline}}</li>
<li>{{CSSxRef("conic-gradient")}}</li>
<li>{{CSSxRef("cos", "cos()")}} (math) {{Experimental_Inline}}</li>
<li>{{CSSxRef("counter")}}</li>
<li>{{CSSxRef("counters")}}</li>
<li>{{CSSxRef("filter-function/contrast", "contrast()")}} (filter)</li>
<li>{{CSSxRef("cross-fade")}} {{Experimental_Inline}}</li>
<li>{{CSSxRef("cubic-bezier", "cubic-bezier()")}}</li>
</ul>
<span>D</span>
<ul>
<li>{{CSSxRef("device-cmyk", "device-cmyk()")}} (colors) {{Experimental_Inline}}</li>
<li>{{CSSxRef("filter-function/drop-shadow", "drop-shadow()")}} (filter)</li>
</ul>
<span>E</span>
<ul>
<li>{{CSSxRef("element")}} {{Experimental_Inline}}</li>
<li>{{CSSxRef("env")}} {{Experimental_Inline}}</li>
<li>{{CSSxRef("ellipse", "ellipse()")}} (shape)</li>
<li>{{CSSxRef("exp", "exp()")}} (math) {{Experimental_Inline}}</li>
</ul>
<span>F</span>
<ul>
<li>{{CSSxRef("fit-content", "fit-content()")}}</li>
<li>{{CSSxRef("format", "format()")}}</li>
</ul>
<span>G</span>
<ul>
<li>{{CSSxRef("filter-function/grayscale", "grayscale()")}} (filter)</li>
</ul>
<span>H</span>
<ul>
<li>{{CSSxRef("hsl", "hsl()")}} (colors)</li>
<li>{{CSSxRef("hsla", "hsla()")}} (colors)</li>
<li>{{CSSxRef("filter-function/hue-rotate", "hue-rotate()")}} (filter)</li>
<li>{{CSSxRef("hwb", "hwb()")}} (colors) {{Experimental_Inline}}</li>
<li>{{CSSxRef("hypot", "hypot()")}} (math) {{Experimental_Inline}}</li>
</ul>
<span>I</span>
<ul>
<li>{{CSSxRef("imagefunction", "image()")}} {{Experimental_Inline}}</li>
<li>{{CSSxRef("image-set")}} {{Experimental_Inline}}</li>
<li>{{CSSxRef("inset()")}} (shape)</li>
<li>{{CSSxRef("filter-function/invert", "invert()")}} (filter)</li>
</ul>
<span>L</span>
<ul>
<li>{{CSSxRef("lab", "lab()")}} (colors) {{Experimental_Inline}}</li>
<li>{{CSSxRef("lch", "lch()")}} (colors) {{Experimental_Inline}}</li>
<li>{{CSSxRef("leader", "leader()")}}</li>
<li>{{CSSxRef("linear-gradient")}}</li>
<li>{{CSSxRef("local", "local()")}} {{Experimental_Inline}}</li>
<li>{{CSSxRef("log", "log()")}} (math) {{Experimental_Inline}}</li>
</ul>
<span>M</span>
<ul>
<li>{{CSSxRef("transform-function/matrix", "matrix()")}} (transform)</li>
<li>{{CSSxRef("transform-function/matrix3d", "matrix3d()")}} (transform)</li>
<li>{{CSSxRef("max")}} (math)</li>
<li>{{CSSxRef("min")}} (math)</li>
<li>{{CSSxRef("minmax")}} (math)</li>
<li>{{CSSxRef("mod", "mod()")}} (math) {{Experimental_Inline}}</li>
</ul>
<span>O</span>
<ul>
<li>{{CSSxRef("filter-function/opacity", "opacity()")}} (filter)</li>
<li>{{CSSxRef("font-variant-alternates/ornaments()", "ornaments()")}} (font)</li>
</ul>
<span>P</span>
<ul>
<li>{{CSSxRef("paint")}} {{Experimental_Inline}}</li>
<li>{{CSSxRef("path", "path()")}} (shape)</li>
<li>{{CSSxRef("transform-function/perspective", "perspective()")}} (transform)</li>
<li>{{CSSxRef("polygon", "polygon()")}} (shape)</li>
<li>{{CSSxRef("pow", "pow()")}} (math) {{Experimental_Inline}}</li>
</ul>
<span>R</span>
<ul>
<li>{{CSSxRef("radial-gradient")}}</li>
<li>{{CSSxRef("rem", "rem()")}} (math) {{Experimental_Inline}}</li>
<li>{{CSSxRef("repeat")}}</li>
<li>{{CSSxRef("repeating-linear-gradient")}}</li>
<li>{{CSSxRef("repeating-radial-gradient")}}</li>
<li>{{CSSxRef("repeating-conic-gradient")}}</li>
<li>rgb() (colors)</li>
<li>rgba() (colors)</li>
<li>{{CSSxRef("transform-function/rotate", "rotate()")}} (transform)</li>
<li>{{CSSxRef("transform-function/rotate3d", "rotate3d()")}} (transform)</li>
<li>{{CSSxRef("transform-function/rotateX", "rotateX()")}} (transform)</li>
<li>{{CSSxRef("transform-function/rotateY", "rotateY()")}} (transform)</li>
<li>{{CSSxRef("transform-function/rotateZ", "rotateZ()")}} (transform)</li>
<li>{{CSSxRef("round", "round()")}} (math) {{Experimental_Inline}}</li>
</ul>
<span>S</span>
<ul>
<li>{{CSSxRef("filter-function/saturate", "saturate()")}} (filter)</li>
<li>{{CSSxRef("transform-function/scale", "scale()")}} (transform)</li>
<li>{{CSSxRef("transform-function/scale3d", "scale3d()")}} (transform)</li>
<li>{{CSSxRef("transform-function/scaleX", "scaleX()")}} (transform)</li>
<li>{{CSSxRef("transform-function/scaleY", "scaleY()")}} (transform)</li>
<li>{{CSSxRef("transform-function/scaleZ", "scaleZ()")}} (transform)</li>
<li>{{CSSxRef("filter-function/sepia", "sepia()")}} (filter)</li>
<li>{{CSSxRef("sign", "sign()")}} (math) {{Experimental_Inline}}</li>
<li>{{CSSxRef("sin", "sin()")}} (math) {{Experimental_Inline}}</li>
<li>{{CSSxRef("transform-function/skew", "skew()")}} (transform)</li>
<li>{{CSSxRef("transform-function/skewX", "skewX()")}} (transform)</li>
<li>{{CSSxRef("transform-function/skewY", "skewY()")}} (transform)</li>
<li>{{CSSxRef("sqrt", "sqrt()")}} (math) {{Experimental_Inline}}</li>
<li>{{CSSxRef("steps", "steps()")}}</li>
<li>{{CSSxRef("font-variant-alternates/styleset()", "styleset()")}} (font)</li>
<li>{{CSSxRef("font-variant-alternates/stylistic()", "stylistic()")}} (font)</li>
<li>{{CSSxRef("font-variant-alternates/swash()", "swash()")}} (font)</li>
<li>{{CSSxRef("symbols", "symbols()")}}</li>
</ul>
<span>T</span>
<ul>
<li>{{CSSxRef("tan", "tan()")}} (math) {{Experimental_Inline}}</li>
<li>{{CSSxRef("target-counter", "target-counter()")}} {{Experimental_Inline}}</li>
<li>{{CSSxRef("target-counters", "target-counters()")}} {{Experimental_Inline}}</li>
<li>{{CSSxRef("target-text", "target-text()")}} {{Experimental_Inline}}</li>
<li>{{CSSxRef("toggle", "toggle()")}} {{Experimental_Inline}}</li>
<li>{{CSSxRef("transform-function/translate", "translate()")}} (transform)</li>
<li>{{CSSxRef("transform-function/translate3d", "translate3d()")}} (transform)</li>
<li>{{CSSxRef("transform-function/translateX", "translateX()")}} (transform)</li>
<li>{{CSSxRef("transform-function/translateY", "translateY()")}} (transform)</li>
<li>{{CSSxRef("transform-function/translateZ", "translateZ()")}} (transform)</li>
</ul>
<span>U</span>
<ul>
<li>{{CSSxRef("url()", "url()")}}</li>
</ul>
<span>V</span>
<ul>
<li>{{CSSxRef("var")}}</li>
</ul>
</div>
<h2 id="规范">规范</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{SpecName("CSS4 Values")}}</td>
<td>{{Spec2("CSS4 Values")}}</td>
<td>Adds <code>toggle()</code>, <code>attr()</code>, <code>calc()</code>, <code>min()</code>, <code>max()</code>, <code>clamp()</code>, <code>round()</code>, <code>mod()</code>, <code>rem()</code>, <code>mod()</code>, <code>sin()</code>, <code>cos()</code>, <code>tan()</code>, <code>asin()</code>, <code>acos()</code>, <code>atan()</code>, <code>atan2()</code>, <code>pow()</code>, <code>sqrt()</code>, <code>hypot()</code>, <code>log()</code>, <code>exp()</code>, <code>abs()</code> and <code>sign()</code> functional notation.</td>
</tr>
<tr>
<td>{{SpecName("CSS3 Values")}}</td>
<td>{{Spec2("CSS3 Values")}}</td>
<td>Adds <code>calc()</code> functional notation.</td>
</tr>
<tr>
<td>{{SpecName("CSS4 Colors")}}</td>
<td>{{Spec2("CSS4 Colors")}}</td>
<td>Adds commaless syntaxes for the <code>rgb()</code>, <code>rgba()</code>, <code>hsl()</code>, and <code>hsla()</code> functional notation.<br>
Allows alpha values in <code>rgb()</code> and <code>hsl()</code>, turning <code>rgba()</code> and <code>hsla()</code> into (deprecated) aliases for them.<br>
Adds <code>hwb()</code>, <code>device-cmyk()</code>, and <code>color()</code> functions.</td>
</tr>
<tr>
<td>{{SpecName("CSS3 Colors")}}</td>
<td>{{Spec2("CSS3 Colors")}}</td>
<td>Adds <code>rgba()</code>, <code>hsl()</code>, <code>hsla()</code> functional notation.</td>
</tr>
<tr>
<td>{{SpecName("CSS4 Images")}}</td>
<td>{{Spec2("CSS4 Images")}}</td>
<td>Adds <code>element()</code>, <code>image()</code>, <code>image-set()</code> and <code>conic-gradient()</code> functional notation.</td>
</tr>
</tbody>
</table>
<h2 id="也可以看看">也可以看看</h2>
<ul>
<li><a href="/en-US/docs/Web/CSS/CSS_Values_and_Units">CSS Values and Units</a></li>
<li><a href="/en-US/docs/Learn/CSS/Introduction_to_CSS/Values_and_units">Introduction to CSS: Values and Units </a></li>
</ul>
<div id="gtx-trans" style="position: absolute; left: 166px; top: 4490px;">
<div class="gtx-trans-icon"></div>
</div>
|
